Project: “DOSIMETRY: Dosimetry science payloads for ExoMars TGO & surface platform;

unified webbased database with Liulin-type instruments’ cosmic radiation data”

History

The project was won during the 1st CALL FOR OUTLINE PROPOSALS UNDER THE PLAN FOR EUROPEAN COOPERATING STATES (PECS) IN BULGARIA, September 2015

The project was conducted in the period 01 July 2016-30 August 2021. The project is completed successfully.

Objectives

Development, manufacture and testing in relevant environments of the geometrical mass, thermal equivalent, engineering, qualification and flight models of the dosimeter (Liulin-ML) of the Active neutron spectrometer and dosimeter (ADRON-EM) instrument of ExoMars 2018 surface platform science payload

The Active neutron spectrometer and dosimeter (ADRON-EM) is in the list of the Russian led instruments for ExoMars 2018 Surface Platform (SP) science payload. The active neutron spectrometer of ADRON-EM instrument is under development in the Space Research Institute (IKI), Moscow. The dosimeter Liulin-ML of ADRON–EM is under development in the Space Research and Technology Institute-BAS (SRTI-BAS), Bulgaria (see Annex 1 - in Russian and http://exploration.esa.int/mars/56933-exomars-2018-surface-platform/). A participant in Liulin-ML is also the Institute of Biological and Medical Problems (IMBP-Moscow) that is responsible for the physical calibrations of the dosimeter and simulations of its response to different exposures. The PI of ADRON-EM is Igor Mitrofanov from IKI, Moscow, Russia.

The objective is to develop, manufacture, test and deliver (directly or trough ESA) to the PI of ADRON-EM the geometrical mass, thermal equivalent, engineering, qualification and flight models, the necessary hardware and software for testing and the necessary technical documentation of the dosimeter Liulin-ML of the ADRON-EM instrument for the ExoMars SP science payload. The dosimeter will be used for radiation environment monitoring onboard the Mars Surface Platform during ExoMars 2018 mission.

Compared to Objective 1 in the outline proposal - development, manufacture and testing of the qualification and flight models, the development and testing of the geometrical mass, thermal equivalent and engineering models are also added. This difference is due to the updated (during the elapsed time between the two proposals) current timeline for development, delivery and testing of the Russian led scientific payload for ExoMars SP (see the recent timeline in Annex 3a compared to the previous one in Annex 3 - in Russian). According Annex 3a the development, delivery and testing of the geometrical mass, thermal equivalent and engineering models continues to 31.10. 2016.

The Liulin-ML contains two dosimetric telescopes. Each pair of the telescopes consists of two Si PIN photodiodes and will provide absorbed dose rate, particle flux, energy deposition spectrum and linear energy transfer (LET) spectrum of primary and secondary charged particles and gamma rays aboard the SP. The combined data from Liulin-ML and the neutron detectors of ADRON-EM will be used to study the radiation conditions from all sources of ionizing radiation during the cruise phase and on the surface of Mars (functional diagram of Liulin-ML).

Data obtained will serve for verification and benchmarking of the radiation environment models and assessment of the radiation risk to the crewmembers of future exploratory flights. 

Flight operations of the dosimeter Liulin-MO of FREND instrument on ExoMars 2016 TGO

The dosimeter Liulin-MO (see Annex 2) of the Fine Resolution Epithermal Neutron Detector (FREND) instrument for ExoMars TGO has been developed and manufactured in STPD-SRTI-BAS under contracts with IKI-Moscow. FREND including its dosimeter Liulin-MO  has been flight qualified in IKI-Moscow, integrated and tested aboard the TGO s/c at TAS-Cannes and recently has gone final pre-launch testing aboard the TGO at Baikonur. The PI of FREND science payload is Igor Mitrofanov from IKI, Moscow, Russia.

The objective is to support the real time verification and analysis of the FREND’s dosimeter Liulin-MO data to assist with the ExoMars TGO mission planning activities.

Handling the data from the dosimeter Liulin-MO of FREND instrument on ExoMars 2016 TGO

The objective is to develop, test and provide to FREND PI and team the necessary Liulin-MO flight data products to be made available to ESA, Roscosmos and the international scientific community. The ownership of Liulin-MO data belongs to SRTI-BAS, IKI-Moscow and IMBP-Moscow. A mutual agreement between the three institutes has been signed that settles this ownership, as well as that all scientific publications based on Liulin-MO data will include the co-authors from SRTI-BAS, IKI-Moscow and IMBP-Moscow.

Development of unified, web-based database with Liulin data

The objective is to survey, collect and store in unified format the existing Liulin type instruments data sets from ISS, BION, Photon and Chandrayan-1 satellites and to develop a web-based database that will serve users from all over the world. The available data of Liulin instruments is described in Annex 5. To prepare in a unified format the Liulin-MO ExoMars TGO data and to add them to the database. This will accelerate the analysis of the Liulin-MO data and will serve the ExoMars TGO team.

 

Highlight Summary

Main results of the project

The geometrical (GM), thermal (TM), engineering (EM), qualification (QM) and flight (FM) models of Liulin-ML dosimeter of ADRON-EM instrument for ExoMars RSP mission, their testing equipment and design documentation has been completed, delivered to Space Research Institute-Moscow-Russia (IKI-Russia) and accepted. The design review of GM, TM, EM, QM, FM and test equipment of EM QM, FM and reviews of input acceptance tests in Bulgaria and IKI-Russia are accepted by the European Space Agency (ESA).

Liulin-ML contains two dosimetric telescopes - A&B (detectors A and B), and C&D (detectors C and D) arranged in parallel directions. Each pair of the dosimetric telescopes consists of two 300 µm thick, 20x10 mm area rectangular Si PIN photodiodes. The distance between the parallel Si PIN photodiodes is 20.8 mm. The functional diagram of the instrument is shown in Fig. 1.

Fig. 1. Functional diagram of Liulin-ML
The primary measured parameters are the amplitudes of the voltage pulses at the outputs of the charge-sensitive preamplifiers - shaping amplifiers CSA1 to CSA4, connected to the detectors. The amplitude of a voltage pulse is proportional to the energy deposited in the corresponding detector by a charged particle or a photon crossing the detector. By an 8-bit ADC these amplitudes are digitized and organized in a deposited 256 channel’s energy deposition spectrum for every one of the detectors. The gains of Liulin–ML preamplifiers CSA1 to CSA4 are a compromise between the conflicting goals of measuring gamma rays, electrons and high - energy protons (which have very low LET and hence requires high gains) and covering the HZE spectrum (which requires low gains to measure highly ionizing particles such as iron). As a result of the compromise one of the pairs of parallel detectors and its corresponding CSA measures and provides the energy deposition spectrum in the range ~ 0.15 – 47 MeV. Those are detectors – preamplifiers A – CSA1 and B – CSA2. The gains of CSA1 and CSA2 are ~ 240 mV MeV-1. CSA1 and CSA2 are powered by + 12V. This leads to a maximum energy deposition of ~ 47 MeV that can be registered in these channels without electronic saturation. The other pair of parallel detectors and its corresponding CSA measures the energy deposition spectrum in the range ~ 0.3 - 190 MeV. Those are detectors – preamplifiers D – CSA3 and C – CSA4. The gains of CSA3 and CSA4 are ~ 60 mV MeV-1. CSA3 and CSA4 are powered by + 12V. This leads to a maximum energy deposition of ~ 190 MeV that can be registered in these channels without electronic saturation.

Further (during on ground data processing) the energy deposition spectrum in a single detector is obtained by combining the energy deposition spectrum measured by A or B - in the range ~ 0.15 – 47 MeV with the energy deposition spectrum measured by C or D in the range ~ 47.1 - 190 MeV. In that way the 2 pairs of two parallel detectors and their corresponding CSAs provide data in the energy deposition range ~ 0.15 - 190 MeV.

The parameters provided by Liulin-ML simultaneously for two pairs of parallel detectors have the following ranges: energy deposition spectra and coincidence energy deposition spectra in the range 0.15 - 190 MeV. The energy deposition spectra and the coincidence spectra are resolved every 130 s in fast mode and every 1 hour in standard mode of measurement.

Totally 8 spectra are measured and provided in the telemetry data: SpA, SpB, SpC, SpD – these are the energy deposition spectra in the single detectors A, B, C, D without a coincidence with signals from the other detector in the telescope; SpAB, SpBA, SpCD, SpDC - these are the coincidence spectra in the corresponding telescopes – the first letter in the name of each of these spectra indicates the detector from which the signal is measured in coincidence with the signal from the detector designated by the second letter. Each one of 8 spectra is of 1024 bytes.

In addition in 2 tables (one for the telescope A&B and the other for the telescope C&D) are recorded the spectral channel numbers of the corresponding signals from the coincidence spectra in which at least one of the coinciding signals is >20 MeV. Each table contains 32 positions and is of 64 bytes. The tables are also provided in the telemetry data.

Fig. 2. External view of Liulin-ML FM
SpA, SpB, SpC, SpD, SpAB, SpBA, SpCD, SpDC will be used for calculation of the particle flux and dose rates during on ground data processing.

SpAB, SpBA, SpCD, SpDC and the 2 tables will be used for determination of the linear energy transfer (LET) spectra and radiation quality factors Q during on ground data processing.

All these data will be used for the calculation of the particle flux, dose rates and dose equivalent rates during on ground data processing.

The external view of Liulin-ML FM is shown in Fig.2.

  • The qualification tests, calibrations and planetary sterilization of Liulin-ML QM and FM in Bulgaria and Russia were completed successfully.
  • The qualification reviews of Liulin-ML QM and FM are accepted by ESA.The qqualification of Liulin-ML QM to Flight Spare Model (FSM) has been completed successfully. The qualification report is accepted by ESA.
  • Liulin-MO dosimeter on ExoMars TGO performs nominally since April 2016.Telemetric data form Liulin-MO dosimeter were received every day and processed in due course during 2016-2019 as was planned in the contract and CCN1. The team database was filled in and used by all FREND team members. These activities continue permanently since 2019 after the work planned in CCN1 was over and this is of importance for the ExoMars TGO operation and science.
  • The pipeline SRTI (Sofia) – IKI (Moscow) – ESAC (Madrid) has been established in late 2019. More than 40 files with calibrated data have been uploaded in PSA till January 2020. EAICD v.2.0 was provided to FREND’s PI and then submitted to PSA. A new version of the calibrated dosimeter data products will be submitted to PSA after ESAC publishes the new version of the input data.
  • An unified web based database with Liulin-type instruments’ cosmic radiation data was developed. The database contains data from 10 space experiments with Liulun type instruments performed between 1991 and 2019 on Mir space station, ISS, Photon, Bion satellites and ExoMars TGO. The final version of the web-based database with the Liulin data is functioning at (http://esa-pro.space.bas.bg/database) and is available to the science community (Fig. 3). At this site also the user manual of the database is available. Preparation and import of the running data from Liuin-MO on TGO from the Science Phase of ExoMars TGO in the Liulin database continues since 2019.

Fig. 3. Liulin database page with data source(s) selection option and user manual

Two separate options were foreseen in the database. By the first option the user downloads the original, zipped “DATA SOURCES” (http://esa-pro.space.bas.bg/datasources) in comma separated values (CSV) format, which are directly opened in a MS EXCEL program, where they can be easily further visualised and analysed in depth. The data sources contain the measured flux and absorbed dose rate with a resolution between 10 sec and 1 hour, the time at which the data were taken and the geographical and geomagnetic coordinates of the vehicle for each data point.

The “DATABASE” allows (http://esa-pro.space.bas.bg/database) the following functions: source selection; data export in CSV and TXT format; and several charts: visualization, synchronized zoom, tooltip and hairline; export to vector, JPEG and PDF format. The manual describes the structure of the database and its operation.

  • Important scientific results were obtained and 82 scientific works were published or presented at scientific meetings.
Lessons learned, Follow on work

No serious technical problems raised during the design, testing and qualifications of Liulin-ML instrument for ExoMars 2020, mainly because the design of the Liulin-ML models developed and qualified for space flight under the contract was based as much as possible on the design and experience of Lulin-MO instrument already successfully flown in the space.

The main problems and risks of the contract were connected with changes of the schedule of ExoMars 2020 project as well as some technical requirements. At the beginning of the contract the planetary sterilization method for Liulin-ML was not defined. The risks were successfully resolved by communications with ESA and the international partners. Maintaining of a Risk register was helpful for this purpose.

Additional necessary works to be done, not envisaged in the original contract were identified during the work on the project and were included in 3 CCNs to the contract. These works were connected with qualification of Liulin-ML QM to FSM, development of a S/W for express analysis of Liulin-ML data during the pre-commissioning and commissioning phases of ExoMars SP, development of methods for calibrations with radioactive sources and calibration of Liulin ML QM, conducting of planetary protection procedures for Liulin-ML, continuation of the daily flight operations of Liulin-MO aboard TGO on Mars orbit, express analysis of its data, preparation and import of the running data from Liuin-MO on TGO from the Science Phase of ExoMars TGO in the Liulin data base to the end of 2019.

Close communications with ESA and the international partners for resolving the problems and risks is one of the main lessons learned.

As a follow-up of some works done under the contract, a new contract between STDP-SRTI-BAS and ESA under PECS entitled “Application of the data received from Liulin-MO dosimeter aboard ExoMars TGO (TGORad)” and based partially on Liulin-MO data processed during the contract “Dosimetry” was signed (http://esa-pro.space.bas.bg/ExoMars/).

Related Publications

  1. Semkova, J., T. Dachev, St. Maltchev, B. Tomov, Yu. Matviichuk, P. Dimitrov, R. Koleva, K. Krastev, I. Mitrofanov, A. Malakhov, M. Mokrousov, A. Sanin, M. Litvak, A. Kozyrev, V. Tretyakov, D. Golovin, S. Nikiforov, A. Vostrukhin, F. Fedosov, N. Grebennikova, V. Benghinc, V. Petrov, V. Shurshakov, Radiation investigations onboard ExoMars missions. Results for radiation parameters during TGO cruise to Mars, Workshop on Radiation Measurements on ISS, ESTEC, Noordwijk, The Netherlands, 6-8 September 2016, http://www.wrmiss2016.de/

  2. Dachev, T.P, N.G. Bankov, B. T. Tomov, Yu. N. Matviichuk, Pl. G. Dimitrov, D.-P. Häder, G. Horneck, Overview of the ISS radiation environment observed during EXPOSE-R2 mission in 2014-2016, Workshop on Radiation Measurements on ISS, ESTEC, Noordwijk, The Netherlands, 6-8 September 2016, http://www.wrmiss2016.de/

  3. Dachev, T.P., Pl. G. Dimitrov, B. T. Tomov, Yu. N. Matviichuk, V.A. Shurshakov, V.V. Benghin, E.N. Yarmanova, O.A. Ivanova, I. Nikolaev, Description of the Liulin-ISS-2 system for personal dosimetric control of Russian cosmonauts inside and outside ISS, Workshop on Radiation Measurements on ISS, ESTEC, Noordwijk, The Netherlands, 6-8 September 2016, http://www.wrmiss2016.de/
  4. Dachev, T., ISS radiation environment in the period 23 October 2014 - 11 January 2016 (Invited), International Symposium on Recent Observations and Simulations of the Sun-Earth System III, Golden Sands, Varna, Bulgaria, September 11-16, 2016, http://www.isroses.lanl.gov/
  5.  Semkova J., Experimental investigations of the radiation environment onboard ExoMars 2016 and 2018 interplanetary mission, International Symposium on Recent Observations and Simulations of the Sun-Earth System III, Golden Sands, Varna, Bulgaria, September 11-16, 2016, http://www.isroses.lanl.gov/
  6. Koleva, R., Transient Plasma Structures in the Magnetotail Lobes, International Symposium on Recent Observations and Simulations of the Sun-Earth System III, Golden Sands, Varna, Bulgaria, September 11-16, 2016, http://www.isroses.lanl.gov/
  7. Krastev K., Calculation of the radiation doses and particle fluxes obtained from the Liulin-MO dosimetric instrument onboard ExoMars 2016 mission to Mars, International Symposium on Recent Observations and Simulations of the Sun-Earth System III, Golden Sands, Varna, Bulgaria, September 11-16, 2016, http://www.isroses.lanl.gov/
  8. Semkova J., Dachev T., Maltchev St., Tomov B., Matviichuk Yu., Dimitrov P., Koleva R., Krastev K. , Mitrofanov I., Malakhov A., Mokrousov M., Sanin A., Litvak M., Kozyrev A., Tretyakov V., Golovin D., Nikiforov S., Vostrukhin A., Fedosov F., Grebennikova N., Benghin V., Shurshakov V., Dosimetry investigations onboard ExoMars missions. Results from radiation measurements during ExoMars 2016 TGO cruise to Mars, The Seventh Moscow Solar System Symposium (7M-S3), Moscow, October 10-14, 2016, http://ms2016.cosmos.ru/
  9. Semkova J., Koleva R , Dachev T., Maltchev St., Tomov B., Matviichuk Yu., Dimitrov P., Krastev K., Mitrofanov I., Malakhov A., Mokrousov M., Sanin A., Litvak M., Kozyrev A., Tretyakov V., Golovin D., Nikiforov S., Vostrukhin A., Fedosov F., Grebennikova N., Benghin V., Shurshakov V., Bulgarian participation in ESA-ROSCOSMOS ExoMars missions. Radiation characteristics onboard ExoMars TGO during the cruise to Mars according Liulin-MO data, SES2016, 2-4 November, Sofia, Bulgaria, http://space.bas.bg/SENS/SES2016/Programme_SES_2016.pdf
  10.  Dachev, T.P, N.G. Bankov, B. T. Tomov, Yu. N. Matviichuk, Pl. G. Dimitrov, D.-P. Häder, G. Horneck, ISS radiation environment as observed by the R3DR2 instrument in the period October 2014-January 2016,  SES2016, 2-4 November, Sofia, Bulgaria, http://space.bas.bg/SENS/SES2016/Programme_SES_2016.pdf
  11. Krastev K., Semkova J., Dachev T., Maltchev St., Tomov B., Matviichuk Yu., Dimitrov P., Koleva R., Mitrofanov I., Malakhov A., Mokrousov M., Sanin A., Litvak M., Kozyrev A., Tretyakov V., Golovin D., Nikiforov S., Vostrukhin A., Fedosov F., Grebennikova N., Benghin V., Shurshakov V., Liulin MO dosimetric instrument - basic parameters and preliminary results obtained onboard ExoMars 2016, SES2016, 2-4 November, Sofia, Bulgaria, http://space.bas.bg/SENS /SES2016/Programme_SES_2016.pdf
  12. Semkova J., Dachev T., Maltchev St., Tomov B., Matviichuk Yu., Dimitrov P., Koleva R., Krastev K. , Mitrofanov I., Malakhov A., Mokrousov M., Sanin A., Litvak M., Kozyrev A., Tretyakov V., Golovin D., Nikiforov S., Vostrukhin A., Fedosov F., Grebennikova N., Benghin V., Shurshakov V., Results from Liulin-MO dosimeter of FREND instrument onboard ExoMars TGO in MCO, SWT, ESTEC, Nordwiik,  January  11-13, 2017
  13. Semkova J., Dachev T., Maltchev St., Tomov B., Matviichuk Yu., Dimitrov P., Koleva R., Krastev K. , Mitrofanov I., Malakhov A., Mokrousov M., Sanin A., Litvak M., Kozyrev A., Tretyakov V., Golovin D., Nikiforov S., Vostrukhin A., Fedosov F., Grebennikova N., Benghin V., Shurshakov V., Space radiation quantities obtained aboard ExoMars Trace Gas Orbiter during the transit and in high elliptic Mars orbit, presentation EGU2017-5412 at EGU 2017, 23-28 April, Vienna, Austria
  14.  Semkova J., Krastev K., Dachev Ts., Koleva R., Malchev S., Tomov B., Matvichuk Y., Dimitrov P., Mitrofanov I., Malahov A., Golovin D., Benghin V., and FREND team. Galactic cosmic rays radiation quantities onboard ExoMars Trace Gas Orbiter during the transit and in Mars orbit, presentation at Ninth Workshop Solar Influences on the Magnetosphere, Ionosphere and Atmosphere" Sunny Beach, Bulgaria, May 30 - June 3, 2017, http://ws-sozopol.stil.bas.bg/2017Sunny/Semkova2017.pdf
  15.  Semkova J., Dachev T., Maltchev St., Tomov B., Matviichuk Yu., Dimitrov P., Koleva R., Krastev K. , Mitrofanov I., Malakhov A., Mokrousov M., Sanin A., Litvak M., Kozyrev A., Tretyakov V., Golovin D., Nikiforov S., Vostrukhin A., Fedosov F., Grebennikova N., Benghin V., Shurshakov V., Results from Liulin-MO dosimeter of FREND instrument onboard ExoMars TGO in MCO1 & MCO2, SWT, IKI, Moscow, June 27-29, 2017
  16. Krastev, K., J. Semkova, R. Koleva, Ts. Dachev, N. Bankov, St. Malchev, V. Benghin, V. Shurshakov, Results from radiation environment investigations on the International Space Station and interplanetary space with Liulin charged particle telescope, Paper presented at 22nd Workshop on Radiation Measurements on ISS, Thales Alenia Space, Torino, Italy, 5–7 September 2017, Abstract book, page 26
  17. Dachev, T.P., N.G. Bankov, B. T. Tomov, Yu. N. Matviichuk, Pl. G. Dimitrov, Relativistic electron precipitation bands and relativistic electrons in Earth’s inner radiation belt, Paper presented at 22nd Workshop on Radiation Measurements on ISS, Thales Alenia Space, Torino, Italy, 5–7 September 2017, Abstract book, page 27.
  18.  Dachev, T.P., N.G. Bankov, B. T. Tomov, Yu. N. Matviichuk, Pl. G. Dimitrov, Dst index induced variations of the ISS inner radiation belt SAA region, Paper presented at 22nd Workshop on Radiation Measurements on ISS, Thales Alenia Space, Torino, Italy, 5–7 September 2017, Abstract book, page 29.
  19.  Semkova, J., R. Koleva, T. Dachev, St. Maltchev, B. Tomov, Yu. Matviichuk, P. Dimitrov, K. Krastev, V. Benghin, I. Mitrofanov, A. Malahov, M. Mokrousov, A. Sanin, M. Litvak, A Kozyrev, V. Tretyakov, D. Golovin, S. Nikiforov, A. Vostrukhin, F. Fedosov, N. Grebennikova, V. Shurshakov, S. Drobyshev, Results From Radiation Environment Measurements onboard Exomars Trace Gas Orbiter During the Transit and in High Eliptic Mars Orbit, Paper presented at 22nd Workshop on Radiation Measurements on ISS, Thales Alenia Space, Torino, Italy, 5–7 September 2017, Abstract book, page 31.
  20.  Semkova, J., R. Koleva, T. Dachev, St. Maltchev, B. Tomov, Yu. Matviichuk, P. Dimitrov, K. Krastev, I. Mitrofanov, A. Malahov, M. Mokrousov, A. Sanin, M. Litvak, A. Kozyrev, V. Tretyakov, D. Golovin, S. Nikiforov, A. Vostrukhin, F. Fedosov, N. Grebennikova, V. Benghin, V. Shurshakov, S. Drobyshev, Charged particles radiation quantities onboard Exomars Trace Gas Orbiter during the transit and in high eliptic Mars orbit, paper presented at the Eighth Moscow Solar System Symposium (8M-S3), Moscow 2017, Abstract Book, p. 169-abstract, ISBN 978-5-00015-029-0
  21. Koleva, R., J. Semkova, T. Dachev, Yu. Matviichuk, B. Tomov, K. Krastev, St. Maltchev, P. Dimitrov, V. Benghin, I. Mitrofanov, A. Malahov, D. Golovin, M. Litvak,  S. Drobyshev, Galactic cosmic rays modulation by solar wind disturbances as observed on board of ExoMars TGO, paper presented at the Eighth  Moscow Solar System Symposium (8M-S3), Moscow 2017, Abstract Book, p. 349-abstract, ISBN 978-5-00015-029-0.
  22.  Koleva, R., J. Semkova, T. Dachev, Yu. Matviichuk, B. Tomov, K. Krastev1, St. Maltchev, P. Dimitrov, V. Benghin, I. Mitrofanov, A. Malahov, D. Golovin, M. Mokrousov,  S. Drobyshev, Y. Yermolaev, Galactic Cosmic Rays Variations Caused by Solar Wind High Speed Streams Observed on Board of Exomars TGO, paper presented at the Thirteen International Conference SES-2017, 2-4 November, 2017, Sofia
  23. Semkova, J., R. Koleva, T. Dachev, St. Maltchev, B. Tomov, Yu. Matviichuk, P. Dimitrov, K. Krastev, I. Mitrofanov, A. Malahov, M. Mokrousov, A. Sanin, M. Litvak, A. Kozyrev, V. Tretyakov, D. Golovin, S. Nikiforov, A. Vostrukhin, F. Fedosov, N. Grebennikova, V. Benghin, V. Shurshakov, S. Drobyshev, Latest Results from Radiation Measurements onboard Exomars Trace Gas Orbiter during the Transit and in Mars Orbit, paper presented at the Thirteen International Conference SES-2017, 2-4 November, 2017, Sofia
  24. Koleva, R., J. Semkova, T. Dachev, Yu. Matviichuk, B. Tomov, K. Krastev, St. Maltchev, P. Dimitrov, V. Benghin, I. Mitrofanov, A. Malahov, D. Golovin, M. Litvak,  S. Drobyshev, Galactic cosmic rays modulation by solar wind disturbances as observed on board of ExoMars TGO, paper presented at the Eighth  Moscow Solar System Symposium (8M-S3), Moscow 2017, Abstract Book, p. 349-abstract, ISBN 978-5-00015-029-0.
  25.  Koleva, R., J. Semkova, T. Dachev, Yu. Matviichuk, B. Tomov, K. Krastev1, St. Maltchev, P. Dimitrov, V. Benghin, I. Mitrofanov, A. Malahov, D. Golovin, M. Mokrousov,  S. Drobyshev, Y. Yermolaev, Galactic Cosmic Rays Variations Caused by Solar Wind High Speed Streams Observed on Board of Exomars TGO, paper presented at the Thirteen International Conference SES-2017, 2-4 November, 2017, Sofia
  26.  Semkova, J., R. Koleva, T. Dachev, St. Maltchev, B. Tomov, Yu. Matviichuk, P. Dimitrov, K. Krastev, I. Mitrofanov, A. Malahov, M. Mokrousov, A. Sanin, M. Litvak, A. Kozyrev, V. Tretyakov, D. Golovin, S. Nikiforov, A. Vostrukhin, F. Fedosov, N. Grebennikova, V. Benghin, V. Shurshakov, S. Drobyshev, Latest Results from Radiation Measurements onboard Exomars Trace Gas Orbiter during the Transit and in Mars Orbit, paper presented at the Thirteen International Conference SES-2017, 2-4 November, 2017, Sofia
  27. Кръстев, К., Й. Семкова, Р. Колева, В. Бенгин, С. Дробишев, Оценка на планетарното влияние на Марс върху дозите и потоците, измерени на “ЛЮЛИН – МО”, paper presented at the Thirteen International Conference SES-2017, 2-4 November, 2017, Sofia
  28.  Jordanka Semkova, Rositza Koleva, Tsvetan Dachev, Yuri Matviichuk, Borislav Tomov, Krasimir Krastev, Stephan Maltchev, Plamen Dimitrov, Igor Mitrofanov, Alexey Malahov, Dmitry Golovin, Maxim Mokrousov, Anton Sanin, Maxim Litvak, Andrey Kozyrev, Vladislav Tretyakov, Sergey Nikiforov, Andrey Vostrukhin, Fedor Fedosov, Natalia Grebennikova, Lev Zelenyi, Victor Benghin, Vyacheslav Shurshakov, Bulgarian Participation in ESA-Roscosmos ExoMars Missions. Radiation Characteristics onboard ExoMars TGO during the Cruise to Mars according to Liulin-MO Data, TWELFTH SCIENTIFIC CONFERENCE with International Participation,  S P A C E E C O L O G Y S A F E T Y S E S 2016 PROCEEDINGS, 2017, invited paper, pp. 16-25, http://space.bas.bg/BG/magasin/SES/PROCEEDINGS%20SES%202016.pdf.
  29. Dachev, T. P., Bankov, N. G., Tomov, B. T., Matviichuk, Y. N., Dimitrov, P. G., Häder, D.-P. & Horneck, G. (2017). Overview of the ISS radiation environment observed during the ESA EXPOSE-R2 mission in 2014–2016. Space Weather, 15. https://doi.org/10.1002/2016SW001580
  30. Dachev, T. P., N. G. Bankov, G. Horneck, D.-P. Häder; Letter to the Editor. Radiat Prot Dosimetry, 174 (2), 292-295, 2017, https://doi.org/10.1093/rpd/ncw123
  31. Dachev, T. P., Relativistic Electron Precipitation Bands in the Outside Radiation Environment of the International Space Station, Journal of Atmospheric and Solar-Terrestrial Physics, 2017. Available online 21 November 2017, https://doi.org/10.1016/j.jastp.2017.11.008
  32. Дачев, Цв., Н. Банков, Б. Томов, Ю. Матвийчук, Пл. Димитров, Д.-П. Хедар, Г. Хорнек, Радиационната обстановка на Международната космическа станция в периода октомври 2014 –януари 2016 по данни от прибора R3DR2, Списание на БАН, 5, 8-13, 2017.
  33.  Dachev, Т., J. Semkova, L. Tomov, Yu. Matviichuk, P. Dimitrov, R. Koleva, St. Malchev, N. Bankov, K. Krastev, I. Mitrofanov, A. Malahov, M. Mokrousov, A. Sanin, M. Litvak, A. Kozyrev, V. Tretyakov, D. Golovin, S. Nikiforov, A. Vostrukhin, F. Fedosov, N. Grebennikova, V. Petrov, I. Chernykh, V. Shurshakov, V. Benghin, E. Yarmanova, O. Ivanova, , D.-P. Häder, M. Lebert, M. Schuster, G. Horneck, G. Reitz, Y. Uchihori, H. Kitamura, F. Spurny, O. Ploc, J. Kubancak, I. Nikolaev Bulgarian instruments for space radiation measurement, Advances in Bulgarian Science ‘2016, 5-58, ISSN: 1314-3565, 2017. http://nacid.bg/bg/ABS/
  34.  Semkova, J., R. Koleva, V. Benghin, T. Dachev, Yu. Matviichuk, B. Tomov, K. Krastev, St. Maltchev,P. Dimitrov, I. Mitrofanov, A. Malahov, D. Golovin, M. Mokrousov, A. Sanin, M. Litvak, A. Kozyrev, V. Tretyakov,  S. Nikiforov, A. Vostrukhin, F. Fedosov, N. Grebennikova, L. Zelenyi, V. Shurshakov, S. Drobyshev, Charged particles radiation measurements with Liulin-MO dosimeter of FREND instrument aboard ExoMars Trace Gas Orbiter during the transit and in high elliptic Mars orbit, Icarus, 303, (2018) 53–66, https://doi.org/10.1016/j.icarus.2017.12.034
  35. Dachev, T. P., Relativistic Electron Precipitation Bands in the Outside Radiation Environment of the International Space Station, Journal of Atmospheric and Solar-Terrestrial Physics, 177 (2018), 247-256, https://doi.org/10.1016/j.jastp.2017.11.008
  36. Dachev, T. P., South-Atlantic Anomaly Magnetic Storms Effects as Observed outside the International Space Station in 2008-2016, Journal of Atmospheric and Solar-Terrestrial Physics, 179, 251-260, 2018. https://doi.org/10.1016/j.jastp.2018.08.009
  37. Igor Mitrofanov,  Maxim Litvak, Alexander Kozyrev, Anton Sanin, Dmitry Golovin, Jordanka Semkova, Tsvetan Dachev and Alexey Malakhov, Paper: 21456,  Fine Resolution Neutron Detector (FREND) onboard ExoMars 2016 Trace Gas Orbiter. First data and future results, COSPAR 2018, Pasadina, California, USA, July 14-22, 2018
  38. Semkova J., Koleva R., Krastev K., Dachev Ts., & Liulin-MO-ExoMars TGO team, Recent Results for the Space Radiation Environment Provided by Liulin-MO Dosimeter aboard Trace Gas Orbiter to Mars, presented at Tenth Workshop “Solar Influences on the Magnetosphere, Ionosphere and Atmosphere”, Primorsko, Bulgaria, June 4÷8, 2018, Book of Abstracts, p 12
  39. Koleva R., Semkova J., Dachev Ts., Matviichuk Yu., Tomov B., Krastev K., Maltchev St., Benghin V., Mitrofanov I., Malahov A., Yermolaev Yu., Galactic Cosmic Rays Variations Caused by Solar Wind High Speed Streams Observed on Board of ExoMars TGO, presented at Tenth Workshop “Solar Influences on the Magnetosphere, Ionosphere and Atmosphere”, Primorsko, Bulgaria, June 4÷8, 2018, Book of Abstracts, p. 20
  40. Dachev Ts., Lilovski K., Bankov N., Tomov B., Matviichuk Yu., Dimitrov P., Semkova J., Koleva R., Shurshakov V., Benghin V., Unified Webbased Database With Liulin-type Instruments Cosmic Radiation Data, presented at Tenth Workshop “Solar Influences on the Magnetosphere, Ionosphere and Atmosphere”, Primorsko, Bulgaria, June 4÷8, 2018, Book of Abstracts, p. 24
  41. Benghin V. , Semkova J. , Dachev Ts. , & Liulin-MO-ExoMars TGO team, Comparision of Liulin-MO Dosimeter Radiation Measurements During ExoMars 2016 TGO Cruise to Mars and in High Elliptic Mars Orbit with Dose Estimations Based on GCR Model, presented at Tenth Workshop “Solar Influences on the Magnetosphere, Ionosphere and Atmosphere”, Primorsko, Bulgaria, June 4÷8, 2018, Book of Abstracts, p. 2
  42. Krastev K., Solar Modulation on Galactic Cosmic Rays, presented at Tenth Workshop “Solar Influences on the Magnetosphere, Ionosphere and Atmosphere”, Primorsko, Bulgaria, June 4÷8, 2018, Book of Abstracts, p.
  43.  .Semkova, J., Koleva, R., Benghin, V., Dachev, T., Matviichuk, Y., Tomov, B., Krastev, K., Maltchev,S., Dimitrov, P., Mitrofanov, I., Malakhov, A., Golovin, D., Mokrousov, M., Sanin, A., Shurshakov, V., Drobyshev, S., Recent Results for Space radiation quantities aboard the ExoMars Trace Gas Orbiter to Mars, presentation at RAD 2018 conference, Ohrid, Macedonia, 17-23 June 2018.
  44. Semkova J. on behalf of FREND team, First science results from Liulin-MO FREND’s dosimeter aboard ExoMars TGO in Mars science orbit, ExoMars Science Working Team Meeting #15/ SOWG #17, ESOC,  Darmstadt 2-4.04.2018
  45. Semkova J., Koleva R., at all., First results for the radiation environment on Mars orbit measured by Liulin-MO dosimeter aboard Trace Gas Orbiter, paper presented at the 23rd Workshop on Radiation Monitoring for the International Space Station", Tsuruga, Japan, 4–6 September  2018, http://www.rine.u-fukui.ac.jp/bousai/event-b/archives/1
  46. Krastev, K., J. Semkova, R. Koleva, V. Benghin, S. Drobyshev, Quantitative estimates of the main dosimetric quantities based on the  LIULIN - MO  - ExoMars measurements, paper presented at the 23rd Workshop on Radiation Monitoring for the International Space Station", Tsuruga, Japan, 4–6 September  2018, http://www.rine.u-fukui.ac.jp/bousai/event-b/archives/1
  47. Dachev, T., Lilovski, K. , Bankov, N., Tomov, B., Matviichuk, Y., Dimitrov, P., Semkova, J., Koleva, R., Shurshakov, V., Benghin, V., D.-P. Häder, G. Horneck, G. Reitz,Unified webbased database with Liulin-type instruments’ cosmic radiation data, paper presented at the 23rd Workshop on Radiation Monitoring for the International Space Station", Tsuruga, Japan, 4–6 September  2018, http://www.rine.u-fukui.ac.jp/bousai/event-b/archives/1
  48. Semkova J. and the Team Liulin-MO-FREND, Recent Results for the Space radiation environment aboard the ExoMars TGO provided by FREND’s Liulin-MO dosimeter, paper presented at European Planetary Science Congress 2018, EPSC Abstracts, Vol. 12, EPSC2018-264, 2018
  49. R. Koleva , J. S emkova, V. Benghin, T. Dachev , Yu .Matviichuk, B. Tomov , K. Krastev, St.Maltchev, I. Mitrofanov, A. Malahov, D. Golovin, M. Mokrousov Y. Yermolaev, Solar wind modulation of galactic cosmic rays observed on board of ExoMars TGO, paper presented at European Planetary Science Congress 2018, EPSC Abstracts, Vol. 12, EPSC2018-576, 2018
  50. Mitrofanov,I., Litvak, M., Sanin, A., Golovin, D., Malakhov, A., Kozyrev, A., Mokrousov, M., Vostrukhin, A., Nikiforov, S., Semkova, J., Koleva, R., Krastev, K., Benghin, V., Dachev, T., Matviichuk, Y., Tomov, B., Maltchev, S., Dimitrov, P., Fine Resolution Epithermal Neutron Detector (FREND) onboard TGO. First results from cruise, elliptical capture orbit and science mapping phase,  paper presented at European Planetary Science Congress 2018, EPSC Abstracts, Vol. 12, EPSC2018-413, 2018
  51.  Semkova J., Koleva R., Krastev K., Benghin V, Drobyshev S., Matviichuk Yu., Tomov B., Bankov N., Dachev Ts., Maltchev St., Dimitrov P., Mitrofanov I., Malahov A., D. Golovin, M. Mokrousov, A. Sanin, M. Litvak, A. Kozyrev, V. Tretyakov, S. Nikiforov, A. Vostrukhin, N. Grebennikova, V. Shurshakov, Recent results for the space radiation environment in Mars  orbit provided by FREND LIULIN-MO dosimeter aboard EXOMARS TGO, paper presented at the Ninth Moscow Solar System Symposium 9M-S3, Space Research Institute, Moscow, Russia, October 8-12, 2018, https://ms2018.cosmos.ru/
  52. Dachev, T., K. Lilovski, N. Bankov, B. Tomov, Y. Matviichuk, P. Dimitrov, J. Semkova, R. Koleva, V. Shurshakov, V. Benghin, D.-P. Häder, G. Horneck, G. Reitz, Description of the database with Liulin type instruments' cosmic radiation data, Proceedings of the fourteenth International Scientific Conference "SPACE, ECOLOGY, SAFETY" – SES 2018, 30-37, Sofia, Bulgaria, 7-9 November, 2018. http://www.space.bas.bg/BG/magasin/SES/PROCEEDINGS%20SES%202018.pdf
  53.  Dachev T., Tomov B., Matviichuk Y., Dimitrov P., Semkova J., Koleva, R., Jordanova, M., Bankov N.,Shurshakov V., Benghin V. Long-Term Variations of the Galactic Cosmic Rays Dose Rates, Proceedings of Eleventh Workshop “Solar Influences on the Magnetosphere, Ionosphere and Atmosphere”, 77-83, Primorsko, Bulgaria, June 3÷7, 2019, ISSN 2367-7570, DOI:10.31401/WS.2019.proc.
  54. .Krastev K., Semkova J., Koleva R., Benghin V., Bankov N., Drobishev S.. THE SHADING EFFECT FOR DOSES AND GALACTIC COSMIC RAYS FLUXES MEASURED BY LIULIN INSTRUMENT, DEPENDING ON LIULIN - MARS GEOMETRY, Book of proceedings, Eleventh Workshop "Solar Influences on the Magnetosphere, Ionosphere and Atmosphere"  Primorsko, Bulgaria, 3-7 June 2019, http://ws-sozopol.stil.bas.bg/, ISSN 2367-7570, DOI:10.31401/WS.2019.proc.
  55. Semkova J., and FREND team  Latest Results for Space Radiation Environment Provided by FREND Liulin-MO Dosimeter aboard ExoMars TGO, Plenary paper, presented at the Fourteenth International Scientific Conference SES 2018 Sofia, 7–9 November 2018, .http://www.space.bas.bg/BG/subitia/SES/SES 2018/PROGRAMME_SES 2018.pdf
  56. Tsvetan Dachev, Nikolay Bankov, Borislav Tomov, Yurii Matviichuk, Plamen Dimitrov, Jordanka Semkova, Rositza Koleva , Kalin Lilovski Vyacheslav Shurshakov, Victor Benghin, Donat-Peter,  Gerda Horneck, Günter Reitz Description of the database with LIULIN type instruments' cosmic radiation data, paper, presented at the Fourteenth International Scientific Conference SES 2018 Sofia, 7–9 November 2018, http://www.space.bas.bg/BG/subitia/SES/SES 2018/PROGRAMME_SES 2018.pdf
  57. Krasimir Krastev, Jordanka Semkova, Rositza Koleva , Victor Benghin, Sergey Drobyshev Прости модели за оценка на дози и потоци ГКЛ въз основа на данните, получени от ЛЮЛИН – МО, paper, presented at the Fourteenth International Scientific Conference SES 2018 Sofia, 7–9 November 2018, http://www.space.bas.bg/BG/subitia/SES/SES 2018/PROGRAMME_SES 2018.pdf
  58.  Semkova, J., R. Koleva, V. Benghin, T. Dachev, Yu. Matviichuk, B. Tomov,  K. Krastev, St. Maltchev,P. Dimitrov, I. Mitrofanov, A. Malahov, D. Golovin, M. Mokrousov, A. Sanin, M. Litvak, A. Kozyrev, V. Tretyakov,  S. Nikiforov, A. Vostrukhin, F. Fedosov, N. Grebennikova, L. Zelenyi, V. Shurshakov, S. Drobyshev, Results for Space Radiation Environment Provided by FREND Liulin-MO Dosimeter aboard ExoMars TGO, Paper presented at ExoMars 2016 SWT#17&SWOG#19, 6-7 March 2019, Paris
  59.  Semkova J., Koleva R., Krastev K., Benghin V., Bankov N., Mitrofanov I., Malakhov A. and FREND team, Radiation environment aboard ExoMars Trace Gas Orbiter in Mars science orbit in May 2018-April 2019, Eleventh Workshop "Solar Influences on the Magnetosphere, Ionosphere and Atmosphere", Primorsko, Bulgaria, 3-7 June 2019, http://ws-sozopol.stil.bas.bg/
  60. Krastev K., Semkova J., Koleva R., Benghin V., Bankov N., Drobishev S.. THE SHADING EFFECT FOR DOSES AND GALACTIC COSMIC RAYS FLUXES MEASURED BY LIULIN INSTRUMENT, DEPENDING ON LIULIN - MARS GEOMETRY, Book of proceedings, Eleventh Workshop "Solar Influences on the Magnetosphere, Ionosphere and Atmosphere", Primorsko, Bulgaria, 3-7 June 2019, http://ws-sozopol.stil.bas.bg/
  61.  Dachev Ts., Dimitrov P., Tomov B., Matviichuk Y., Semkova, J., Koleva R., Jordanova M., Bankov N., Shurshakov V., Benghin V... LONG-TERM VARIATIONS OF THE GALACTIC COSMIC RAYS DOSE RATES, Book of proceedings, Eleventh Workshop "Solar Influences on the Magnetosphere, Ionosphere and Atmosphere"  Primorsko, Bulgaria, 3-7 June 2019, http://ws-sozopol.stil.bas.bg/ .
  62. Jordanka Semkova on behalf of FREND team, New Results for the Space radiation environment aboard the ExoMars Trace Gas Orbiter during the Transit to Mars and in Mars Orbit , RAD 2019- Seventh International conference on radiation and applications in various fields of research, 10-14.06.2019, RAD7-181 Herceg Novi , Montenegro
  63.  R. Koleva on behalf of the FREND team, Results from Liulin-MO FREND’s dosimeter aboard ExoMars TGO in Mars science orbit in 2019, ExoMars 2016 SWT#18&SWOG#20, St. Petersburg, 17 - 18.06.2019
  64.  Semkova, J., R. Koleva, V. Benghin, T. Dachev, Yu. Matviichuk, B. Tomov,  K. Krastev, St. Maltchev,P. Dimitrov, I. Mitrofanov, A. Malahov, D. Golovin, M. Mokrousov, A. Sanin, M. Litvak, A. Kozyrev, V. Tretyakov,  S. Nikiforov, A. Vostrukhin, F. Fedosov, N. Grebennikova, L. Zelenyi, V. Shurshakov, S. Drobyshev, Radiation environment aboard ExoMars Trace Gas Orbiter in Mars science orbit in May 2018-July 2019, WRMISS 24, 02-05.09.2019, Athens, Greece
  65. .Dachev T., Tomov B., Matviichuk Y., Dimitrov P., Semkova J., Koleva, R., Jordanova, M., Bankov N.,Shurshakov V., Benghin V. GCR flux and dose rates variations observed experimentally by 13 Liulin type instruments between 1991 and 2019, Paper presented at 24th Workshop on Radiation Measurements on ISS, Athens, Greece, 3–5 September 2019.
  66.  Jordanka Semkova on behalf of FREND team, Results from radiation environment measurements aboard ExoMars Trace Gas Orbiter in Mars science orbit in May 2018-August 2019, EPSC, 15-20.09.2019, Geneva, Switzerland
  67.  R. Koleva on behalf of the FREND team, Galactic cosmic rays parameters in deep space at 1.5 a.u: ExoMars TGO results , EPSC, 15-20.09.2019, Geneva, Switzerland
  68. Semkova, J., R. Koleva, V. Benghin, T. Dachev, Yu. Matviichuk, B. Tomov,  K. Krastev, St. Maltchev,P. Dimitrov, I. Mitrofanov, A. Malahov, D. Golovin, M. Mokrousov, A. Sanin, M. Litvak, A. Kozyrev, V. Tretyakov,  S. Nikiforov, A. Vostrukhin, F. Fedosov, N. Grebennikova, L. Zelenyi, V. Shurshakov, S. Drobyshev,  RADIATION ENVIRONMENT ABOARD EXOMARS TGO IN MARS SCIENCE ORBIT IN 2018-2019 ACCORDING THE DATA FROM LIULIN-MO DOSIMETER , SES 2019, Sofia, November 6-7, 2019.
  69.  Dachev, T, Tomov, B., Matviichuk, Y., Dimitrov, P., Bankov, N., Semkova, J., Koleva, R., Jordanova, M., Shurshakov, V., Benghin, V.. Long-Term Variations of the Galactic Cosmic Rays Dose Rates. Proceedings of Eleventh Workshop “Solar Influences on the Magnetosphere, Ionosphere and Atmosphere, 2019, ISSN:ISSN 2367-7570, 77-83.
  70.  Krastev, K., Semkova J, Koleva R., Bankov N, Benghin V, Drobishev S.. The Shading Effect for Doses and Galactic Cosmic Rays Fluxes Measured by Liulin. Eleventh workshop "Solar Influences on the Magnetosphere, Ionosphere and Atmosphere", Book of Proceedings, 11, Space Research and Technologies Institute Bulgarian Academy of Sciences, 2019, ISSN:2367-7570, DOI:10.31401/WS.2019.proc, 31-34
  71.  J. Semkova on behalf of the FREND team, Update of results from Liulin-MO FREND’s dosimeter aboard ExoMars TGO in Mars science orbit, ExoMars Science Working Team Meeting #19/SOWG#21,Bern, 28 - 30.10.2019
  72. Tsvetan P.Dachev, Borislav T.Tomov, Yuri N.Matviichuk, Plamen G.Dimitrov, Jordanka V.Semkova, Rositsa T.Koleva, Malina M. Jordanova, Nikolay G.Bankov, Viacheslav A.Shurshakov, Victor V.Benghin, Solar modulation of the GCR flux and dose rate, observed in space between 1991 and 2019, Life Sciences in Space Research, Volume 26, August 2020, Pages 114-124, https://doi.org/10.1016/j.lssr.2020.06.002
  73.   Jordanka Semkova, Rositza Koleva, Victor Benghin, Tsvetan Dachev, Yuri Matviichuk, Borislav Tomov, Krasimir Krastev, Stephan Maltchev, Plamen Dimitrov, Nikolay Bankov, Igor Mitrofanov, Alexey Malakhov, Dmitry Golovin, Maxim Mokrousov, Anton Sanin, Maxim Litvak, Alexander Kozyrev, Sergey Nikiforov, Denis Lisov, Artem Anikin, Vyacheslav Shurshakov, Sergey Drobyshev, RADIATION ENVIRONMENT IN THE INTERPLANETARY SPACE AND MARS ORBIT IN 2016-2020 ACCORDING MEASUREMENTS ABOARD EXOMARS TGO, paper presented at Sixteenth International Scientific Conference SPACE, ECOLOGY, SAFETY (SES 2020), Sofia, 2-4 December 2020,http://space.bas.bg/SES/index/docs/2020/2020_SES_Programme.pdf, pp. 5
  74.  Jordanka Semkova, Rositza Koleva, Victor Benghin, Tsvetan Dachev, Yuri Matviichuk, Borislav Tomov, Krasimir Krastev, Stephan Maltchev, Plamen Dimitrov, Nikolay Bankov, Igor Mitrofanov, Alexey Malakhov, Dmitry Golovin, Maxim Mokrousov, Anton Sanin, Maxim Litvak, Alexander Kozyrev, Sergey Nikiforov, Denis Lisov, Artem Anikin, Vyacheslav Shurshakov, Sergey Drobyshev, RADIATION ENVIRONMENT IN THE INTERPLANETARY SPACE AND MARS ORBIT IN 2016-2020 ACCORDING MEASUREMENTS ABOARD EXOMARS TGO, paper published at PROCEEDINGS of the Sixteenth International Scientific Conference SPACE, ECOLOGY, SAFETY (SES 2020), http://space.bas.bg/SES/archive.html, e-ISSN 2603 – 3321, pp. 23-34  
  75. Dachev T., Semkova J., Tomov B., Matviichuk Y., Dimitrov P., Koleva1 R., Jordanova M., Bankov N., Litvak M., Mitrofanov I., Golovin D., Kozyrev A., Malakhov A., Mokrousov M., Sanin A., Tretyakov V., Fedosov F., Ploc O., Shurshakov V., Benghin V. A Comparison of the Neutron Dose Measurements Completed by the Bulgarian and Russian Instruments Outside the Zvezda Module of the ISS, Proceedings of the Twelfth Workshop “Solar Influences on the Magnetosphere, Ionosphere and Atmosphere” September, 2020, pp. 99-108, DOI: 10.31401/WS.2020.proc, ISSN 2367-7570, http://ws-sozopol.stil.bas.bg/pages/Proceedings2020dwl.html
  76. Dachev T., Tomov B., Matviichuk Y., Dimitrov P., Semkova J., Jordanova M., Bankov N., Ploc O., Litvak M., Tretyakov V., Shurshakov V., Benghin V. Registration of Neutrons with a Single Detector Liulin Type Spectrometer, Proceedings of the Twelfth Workshop “Solar Influences on the Magnetosphere, Ionosphere and Atmosphere” September, 2020, pp.109-116, DOI: 10.31401/WS.2020.proc, ISSN 2367-7570, http://ws-sozopol.stil.bas.bg/pages/Proceedings2020dwl.htm  
  77. J. Semkova on behalf of the FREND team, Update of science results of Liulin-MO FREND dosimeter during TGO cruise and in MSO, report presented at ExoMars Science Working Team Virtual Meeting #21/SOWG#23, 15 - 17.09.2020.  Semkova, J. and the Liulin-MO-FREND: Update of the radiation environment measurement results aboard ExoMars TGO in May 2018-June 2020, paper presented at Europlanet Science Congress 2020, online, 21 September–9 Oct 2020, EPSC2020-50, 2020,  https://doi.org/10.5194/epsc2020-50    
  78. Jordanka Semkova, Rositza Koleva, Victor Benghin, Tsvetan Dachev, Yuri Matviichuk, Borislav Tomov, Krasimir Krastev, Stephan Maltchev, Plamen Dimitrov, Nikolay Bankov, Igor Mitrofanov, Alexey Malakhov, Dmitry Golovin, Maxim Mokrousov, Anton Sanin, Maxim Litvak, Alexander Kozyrev, Sergey Nikiforov, Denis Lisov, Artem Anikin, Vyacheslav Shurshakov, Sergey Drobyshev, RADIATION ENVIRONMENT IN THE INTERPLANETARY SPACE AND MARS’ ORBIT ACCORDING FREND’S LIULIN-MO DOSIMETER ABOARD EXOMARS TGO DATA, paper presented at THE ELEVENTH MOS MOSCOW SOLAR SYSTEM SYMPOSIUM 2020, 5-8 October 2020, Moscow.
  79. J. Semkova on behalf of FREND team, Update of science results of Liulin-MO FREND dosimeter (September 2020-January 2021), report presented at ExoMars SWT#22,10-12 February, 2021 virtual meeting.  
  80. Jordanka Semkova, Rositza Koleva, Victor Benghin, Tsvetan Dachev, Yuri Matviichuk, Borislav Tomov, Krasimir Krastev, Stephan Maltchev, Plamen Dimitrov, Nikolay Bankov, Igor Mitrofanov, Alexey Malakhov, Dmitry Golovin, Maxim Mokrousov, Anton Sanin, Maxim Litvak, Alexander Kozyrev, Sergey Nikiforov, Denis Lisov, Artem Anikin, Vyacheslav Shurshakov, Sergey Drobyshev, “Results from radiation environment measurements aboard ExoMars Trace Gas Orbiter in Mars science orbit in May 2018 - December 2019”, Icarus, June 2021, 114264,  https://doi.org/10.1016/j.icarus.2020.114264.  
  81. J. Semkova on behalf of FREND team, Update of science results of Liulin-MO FREND dosimeter/Data pipeline and archiving (June 2021), report presented at ExoMars virtual meeting SWT#23/SOWG#25, 23 - 25.06.2021

 

Duration of the project

01.07.2016 - 31.08.2021

Organizational Chart

Project Plan - CCN01

Code

Task Name

M

Duration

Start

Finish

 

ESA Project

 

 

01-07-16

31-01-20

WP 1

Development of the geometrical mass, thermal equivalent, engineering and qualification models (GM, TM, EM and QM) of Liulin-ML dosimeter of ADRON-EM

 

848 days

01-07-16

01-10-19

Task 1.1.

      Purchase parts and materials for the EM, QM and for the testing equipment of EM and QM

 

261 days

01-07-16

30-06-17

Task 1.2.

      Development of the GM and TM and their design documentation

 

130 days

01-07-16

29-12-16

D01.01

      Design review of GM, TM

6

0 days

30-12-16

30-12-16

Task 1.3.

      Task 1.3. Acceptance tests of GMand TM in Bulgaria

 

151 days

03-10-16

30-04-17

D01.02

      Test readiness report for GM and TM

6

0 days

30-12-16

30-12-16

D01.03

      Review on tests results of GM and TM in Bulgaria

10

0 days

30-04-17

30-04-17

Task 1.4

      Delivery the GM and TM and the documentation, input control and acceptance tests in IKI. Analysis of the test results of GM and TM, outputs to EM, changes in the design documentation of GM and TM

 

86 days

30-12-16

15-10-17

D01.04

      Delivery and qualification review of GM and TM.

16

0 days

15-10-17

15-10-17

Task 1.5.

      Development of the EM and design documentation of EM.

 

238 days

01-07-16

30-05-17

D01.05

      Design review of EM

11

0 days

31-05-17

31-05-17

Task 1.6.

      Development of S/W and H/W for testing EM and its design documentation .

 

238 days

01-07-16

30-05-17

D01.06

      Design review of S/W and H/W for testing EM

11

0 days

31-05-17

31-05-17

Task 1.7.

      Acceptance tests of the EM in Bulgaria

 

153 days

31-03-17

15-01-18

D01.07

      Test readiness report of EM

19

0 days

15-01-18

15-01-18

D01. 08

      Review on tests results of EM in Bulgaria

19

0 days

15-01-18

15-01-18

Task 1.8

      Delivery the EM, test equipment and their documentation, input control and acceptance tests in IKI

 

110 days

01-07-17

01-03-18

D01.09

      Delivery review of EM

20

0 days

28-02-18

28-02-18

Task 1.9

      Testing of the EM in the integrated EM of ADRON-EM. Analysis of the test results of EM, outputs to QM and FMs, changes in the design documentation

 

43 days

02-10-17

01-03-18

D01. 10

      Qualification review of EM

20

0 days

28-02-18

28-02-18

Task 1.10.

      Development of theQM and QM design documentation

 

325 days

01-07-16

01-04-18

D01. 11.

      Design review of QM

21

0 days

29-03-18

29-03-18

Task 1.11.

      Development of S/W and H/W for testing QM and its design documentation

 

325 days

01-07-16

01-04-18

D01.12.

      Design review of S/W and H/W for testing the QM.

21

0 days

29-03-18

29-03-18

Task 1.12.

      Testing and acceptance tests of QM in Bulgaria .

 

65 days

01-01-19

01-04-19

D01.13

      Test readiness report on QM.

33

0 days

29-03-19

29-09-19

D01.14

      Review on tests results of QM in Bulgaria

33

0 days

29-03-19

29-03-19

Task 1.13

      Delivery the QM, the QM test equipment and their documentation, input control and acceptance tests in IKI

 

21 days

29-03-19

01-05-19

D01.15

      Delivery review of QM.

34

0 days

30-04-19

30-04-19

Task 1.14.

      Testing the QM in the integrated QM of ADRON-EM in IKI.

 

87 days

01-05-19

01-09-19

D01.16

      Review on qualification and resource tests of QM

38

0 days

28-08-19

28-08-19

Task 1.15

      Analysis of the test results of QM, outputs to FMs, changes in the design documentation

 

129 days

02-10-19

01-11-19

D01.17

      Qualification review of QM

39

0 days

30-09-19

30-09-19

WP 2

Development of the flight (FM) model of Liulin-ML dosimeter of ADRON-EM

 

848 days

01-07-16

01-10-19

Task 2.1

      Purchase parts and materials for the FM and for the testing equipment of FM

 

456 days

01-07-16

30-03-18

Task 2.2.

      Development of FM and design documentation of FM

 

498 days

01-07-16

29-05-18

D02.01.

      Design review of FM

23

0 days

30-05-18

30-05-18

Task 2.3.

      Development of S/W, and H/W for testing of FM and its design documentation.

 

498 days

01-07-16

29-05-18

D02.02.

      Design review of S/W and H/W for testing and calibrations of FM

23

0 days

30-05-18

30-05-18

Task 2.4.

      Testing and acceptance tests of FM in Bulgaria

 

107 days

31-04-19

30-07-19

D02.03

      Test readiness report for FM

36

0 days

30-06-19

30-06-19

D02.04

      Review of FM test results in Bulgaria

37

0 days

29-07-19

29-07-19

Task 2.5

      Delivery the FM, the FM test equipment and their documentation, input control and acceptance tests in IKI.

 

194 days

01-07-19

31-07-19

D02.05

      FM delivery review

37

0 days

30-07-19

30-07-19

Task 2.6

      Testing the FM model in the integrated FM of ADRON-EM in IKIand NPO Lavochkin.

 

194 days

31-08-19

30-09-19

D02.06

      Review on test results of FM in the integrated FM of ADRON-EM

39

194 days

30-09-19

30-09-19

Task 2.7.

      Analysis of the tests and calibration results of FM, changes in the design documentation of the FM if necessary

 

194 days

15-09-19

30-09-19

D02.07

      Qualification review of FM

39

0 days

30-09-19

30-09-19

WP 3

Flight operations of Liulin-MO dosimeter of FREND instrument on ExoMars TGO

 

499 days

01-07-16

30-05-18

Task 3.1.

      Design and development of software for producing quick-looks

 

64 days

01-07-16

28-09-16

D03.01

      Code and user manual for graphical presentation of the data

3

0 days

29-09-16

29-09-16

Task 3.2.

      Verification and analysis of Liulin-MO science results during the cruise phase of TGO mission

 

129 days

01-07-16

28-12-16

D03.02

      Review of Liulin-MO performance during TGO cruise phase

6

0 days

29-12-16

29-12-16

Task 3.3.

      Real time verification and analysis of Liulin-MO science results during the science phase of TGO

 

498 days

01-07-16

29-05-18

D03.03

      Review of Liulin-MO performance during TGO science phase

23

0 days

30-05-18

30-05-18

WP 4

Handling the data from the dosimeter Liulin-MO of FREND instrument on ExoMars TGO

 

2957 days

28-02-07

29-06-18

Task 4.1.

      Numerical calculation of the instrument response function

 

64 days

01-07-16

28-09-16

D04.01

      Precise calibration information about Liulin-MO

3

0 days

29-09-16

29-09-16

Task 4.2

      Creating the software for final data processing

 

171 days

01-07-16

24-02-17

D04.02

      Code and user manual for final data processing

8

0 days

28-02-07

28-02-07

Task 4.3

      Create and deliver to FREND PI scientific data products obtained during the commission and cruise phase

 

215 days

01-07-16

27-04-17

D04.03

      Review oft science results obtained during the commission and cruise phase

10

0 days

28-04-17

28-04-17

Task 4.4

      Create and deliver to FREND PI scientific data products obtained during the science phase

 

520 days

01-07-16

28-06-18

D04.04

      Review of science results obtained during the science phase

24

0 days

29-06-18

29-06-18

WP 5

Development of uniform, web-based database with the Liulin data

 

499 days

01-07-16

31-05-18

Task 5.1

      Survey, classification and definition of relevant data

 

86 days

01-07-16

28-10-16

D05.01

      Existing radiation experiments data classified and cross calibrated for relevant parameters. Review.

4

0 days

31-10-16

31-10-16

Task 5.2

      Data recovery and formatting

 

130 days

01-07-16

29-12-16

D05.02

      Formatted and recovered data, Review and description.

6

0 days

30-12-16

30-12-16

Task 5.3

      Data cross exploitation with the satellite coordinates

 

195 days

01-07-16

30-03-17

D05.03

      Liulin radiation data tabled together with the time and space data. Description.

9

0 days

31-03-17

31-03-17

Task 5.4

      Establishment of data quality assurance

 

261 days

01-07-16

30-06-17

D05.04

      Data quality assured. Review and description.

12

0 days

03-07-17

03-07-17

Task 5.5

      User requirements analysis; I/O Interfaces development.

 

390 days

01-07-16

28-12-17

D05.05

      User and system specifications; I/O Interfaces and software. Review and description.

18

0 days

29-12-17

29-12-17

Task 5.6

      Uniform database software development; Beta version running

 

455 days

01-07-16

29-03-18

D05.06

      Software, Data formatted for delivery and database; Beta version Review and description.

21

0 days

30-03-18

30-03-18

Task 5.7

      Final uniform database running

 

499 days

01-07-16

30-05-18

D05.07

      Validated uniform database. User manual.

23

0 days

31-05-18

31-05-18

WP 6

Management and reporting

 

1348 days

01-07-16

31-08-2021

Task 6.1

      Project management and reporting

 

631 days

01-07-16

30-11-18

D06.01.1

      Risk register and I Progress report

3

0 days

30-09-16

30-09-16

D06.02

      Project Website online

3

0 days

30-09-16

30-09-16

D06.01.2

      II progress report and Risk register updated delivery

6

0 days

30-12-16

30-12-16

D06.03.1

      III progress report and Risk register updated delivery

9

0 days

31-03-17

31-03-17

D06.03.2

      IV progress report and Risk register updated delivery

12

0 days

30-06-17

30-06-17

D06.04.1

      V progress report and Risk register updated delivery

15

0 days

29-09-17

29-09-17

D06.04.2

      VI progress report and Risk register updated delivery

18

0 days

29-12-17

29-12-17

D06.04.3

      VII progress report and Risk register updated delivery

21

0 days

30-03-18

30-03-18

D06.05

      VIII progress report and Risk register updated delivery

24

0 days

29-06-18

29-06-18

D06.06

      IX progress report and Risk register updated delivery

27

0 days

28-09-18

28-09-18

Task 6.2

      Preparation and delivery of Technical Data Package

 

17 days

01-08-2021

21-08-2021

D06.07

      Technical Data Package Delivery

42

0 days

21-08-2021

21-08-2021

Task 6.3

      Preparation and delivery of Final Report

 

17 days

01-08-2021

21-08-2021

D06.08

      Final Report Delivery

42

0 days

21-08-2021

21-08-2021

Task 6.4

      Preparation and delivery of Executive Summary Report

 

17 days

01-08-2021

21-08-2021

D06.09

      Executive Summary Report Delivery

42

0 days

21-08-2021

21-08-2021

Task 6.5

      Contractual management

 

1348 days

01-07-16

31-08-2021

Task 6.6

      Resources management

 

1348 days

01-07-16

31-08-2021

 

PLANNING of CONTRACT CHANGE NOTICE No. 01 (CCN01)

 

 

 

 

WP 7

Continuation of pre-launch works for QM and FM of Liulin-ML dosimeter on ExoMars 2020 SP

 

107 days

15-04-19

10-12-19

Task 1.1.

   Calibration of QM. Development of a S/W, analysis of the calibration results.

 

87 days

15-04-19

13-08-19

TN01.01

   Review of calibrations method, S/W and results

4

0 days

12-08-19

12-08-19

Task 1.2.

   Environmental protection of QM. Analysis of the QM performance after sterilization. Input for FM

 

44 days

15-04-19

13-08-19

TN01.02

   Review on the microbiological assays and operation of Liulin-ML QM after sterilization

4

0 days

12-06-19

12-08-19

Task 1.3.

   Task 1.3. Environmental protection of FM. Analysis of FM performance after sterilization

 

45 days

10-07-19

10-12-19

TN01.03

   Review on the microbiological assays and operation of FM after sterilization works

8

0 days

11-09-19

09-12-19

WP 8

Flight operations and handling the data of the dosimeter Liulin-MO of FREND instrument on ExoMars TGO

 

237 days

15-04-19

10-12-19

Task 2.1

   Verification of Liulin-MO performance during the science phase of TGO

 

129 days

15-04-19

10-12-19

TN02.01

   Review of Liulin-MO performance during the 10th –15th months of TGO science phase.

4

0 days

15-04-19

12-08-19

Task 2.2

   Import of Liulin-MO data obtained during TGO science phase into the Unified web-based database with Liulin type instruments cosmic radiation data

 

42 days

14-10-19

10-12-19

TN02.02

   Review of the importation of Liulin-MO data into the Unified web-based database with Liulin type instruments cosmic radiation data

8

0 days

10-12-19

10-12-19

WP 9

Management and reporting

 

259 days

15-04-19

10-12-19

Task 3.1

   Project management and reporting. Contractual management. Resources management

 

259 days

15-04-19

10-12-19

TN 03.01

   Project Website updated

2

0 days

13-06-19

13-06-19

 

   CCN01 I Progress report and Risk register

3

0 days

15-07-19

15-07-19

 

   CCN01 II Progress report and Risk register

6

0 days

15-10-19

15-10-19

 

   CCN01 III Progress report and Risk register

8

0 days

16-12-19

16-12-19
Project plan CCN02 reduced by CCN03 
Code Task Name   Duration Start Finish
WP 10 Qualification of FM and FSM for launch on ExoMars 2020 SP   185 days 17-12-19 31-08-20
Task 10.1.    Qualification of the Liulin-ML QM to Flight Spare Model (FSM) in compliance with the Russian requirements for this procedure. Additional sterilization of FSM and analyses of Liulin-ML FSM operation after that (if necessary)..   129 days 02-01-20 30-06-20
TN10.01    Report on the qualification results of QM to FSM accompanied by a protocol signed by the Russian partners   0 days 30-06-20 30-06-20
WP 11 Qualification of Liulin-ML to TRL9   304 days 01-07-20 30-08-21
Task 11.1    Verification of Liulin-ML performance during the pre-commissioning and commissioning phases of SP   284 days 01-07-20 02-08-21
TN 11.01    Description of the S/W for express analysis of Liulin-ML data.   0 days 15-09-20 15-09-20
WP 12 Management and reporting   185 days 17-12-19 31-08-20
Task 12.01    Project management and reporting. Contractual management. Resources management   185 days 17-12-19 31-08-20
TN 12.01    Project Website updated   0 days 15-02-20 15-02-20
  CCN02 I Progress report and Risk register   0 days 20-03-20 20-03-20
  CCN02 II Progress report and Risk register   0 days 25-06-20 25-06-20
  CCN02 III Progress report and Risk register   0 days 30-09-20 30-09-20
  CCN02 IV Progress report and Risk register   0 days 30-12-20 30-12-20
  CCN02 V Progress report and Risk register   0 days 30-03-21 30-03-21
  CCN02 VI Progress report and Risk register   0 days 30-06-21 30-06-21