Instrument AdronRM for Exo Mars 2020 Igor Mitrofanov

Instrument Adron-RM for Exo. Mars 2020 Igor Mitrofanov, Adron-RM PI Sergei Nikiforov, Adron-RM Instrument manager Space Research Institute (IKI) nikiforov@np. cosmos. ru Exo. Mars Science Working Team #10 17– 20 April 2018 IKI, Moscow (RUS) 1

DAN/MSL: Prototype of the Adron-RM Thermal/Epithermal neutrons DAN/PNG Neutron variations in the floor of Gale crater 0 200 DAN/DE (Active mode) (Passive mode) 400 Covered Distance, m Exo. Mars Science Working Team #10, 17– 20 April 2018 600 2

landing site Active measurements Passive measurements di re ct io n each spot = 100 m of Passive measurement Avera ge water: 2. 6 % Average water: 2. 7 %

Sols 540 - 552 Exo. Mars Science Working Team #10, 17– 20 April 2018 4

Adron observations Adron-EM (Neutron generator + Gamma-Ray and Neutron detectors ) Distance between instruments: up to 10 m Neutron pulse Exo. Mars Science Working Team #10, 17– 20 April 2018 Adron-RM Neutron Detector 5

Adron-RM main parameters Counter 3 He with Cd shield Electronic box Detectors Components Overall dimension (X × Y × Z, mm) 42. 5 × 204 × 210 Operating temperatures -40. . +50 o. C Non-operating temperatures -50. . +55 o. C Power consumption Up to 3. 2 W Mass 1300 g Output interface RS 422 Exo. Mars Science Working Team #10, 17– 20 April 2018 (qualification down to -55 o. C) 6

Adron-RM specification The instrument contains two detectors based on 3 He proportional counters. One of the detectors has the cadmium shield which absorbs neutrons below the energy of 0. 4 e. V. Detector unit Components Functions CTN He 3 counter + Mechanical frame Detection of thermal and epithermal neutrons (0. 01 – 100 e. V) CETN He 3 counter + Mechanical frame + Cd shield Detection of epithermal neutrons (0. 4 – 100 e. V) front rear Exo. Mars Science Working Team #10, 17– 20 April 2018 7

Adron-RM: Calibration facilities Joint Institute For Nuclear Research, Dubna Calibration facilities in Dubna were used for the DAN instrument calibrations. This facilities allow to vary distribution of hydrogen under the instrument. Exo. Mars Science Working Team #10, 17– 20 April 2018 8

Adron-RM: Calibration facilities Instrument model Passive calibrations Fast Passive Places of calibrations + + IKI Adron-RM EQM + + Adron-RM FM + + IKI, Joint Institute For Nuclear Research Dubna Adron-RM FSM + + IKI, Joint Institute For Nuclear Research Dubna Adron-RM EM IKI, Joint Institute For Nuclear Research Dubna Passive mode calibrations will be done with reference neutron source. Fast Passive mode calibration will be done with laboratory neutron generator (same with Adron-EM) and thick target for irradiation. Calibration facilities in Dubna Joint Institute For Nuclear Research will be used for Adron-RM calibrations. This facilities have different reference neutron sources and they allow to vary distribution of hydrogen in thick target under the instrument. Exo. Mars Science Working Team #10, 17– 20 April 2018 9

Adron-RM: Development status • SWIS: Model Layer 1/2 delivered • STM/PPRM: delivered • EIS: delivered • EM: delivered • EQM: delivered • FM: DRB in May 2018 • SFM: will be ready by August 2018 (will be delivered by the Project request) Exo. Mars Science Working Team #10, 17– 20 April 2018 10