1. NASA 2001 Mars Odyssey page 1 Workshop HEND - 2002 Russian Aviation and Space Agency Institute for Space Research The present program of physical calibrations of Qualification Unit of instrument HEND

2. NASA 2001 Mars Odyssey page 2 Workshop HEND - 2002 Russian Aviation and Space Agency Institute for Space Research Neutron part of HEND detectors He3 Based Counters

3. NASA 2001 Mars Odyssey page 3 Workshop HEND - 2002 Russian Aviation and Space Agency Institute for Space Research Neutron and gamma-ray part of HEND detectors: Stilben Scintillator and CsI Scintillator

4. NASA 2001 Mars Odyssey page 4 Workshop HEND - 2002 Russian Aviation and Space Agency Institute for Space Research Calibration Facility

5. NASA 2001 Mars Odyssey page 5 Workshop HEND - 2002 Russian Aviation and Space Agency Institute for Space Research Calibration Facility Source of neutrons Flux ~ 10 6 n cm 2 /sec d(T,n)  (15 MeV n) d(D,n) 3 He (5 MeV n) 7 Li(p,n) 7 Be (< 1 MeV n)

6. NASA 2001 Mars Odyssey page 6 Workshop HEND - 2002 Russian Aviation and Space Agency Institute for Space Research Measurements with isotope sources Pu_Be source: 3.8 MeV (29.6+/-0.2)/r 2 n cm -2 s -1 Cf source: 2.1 MeV (13.2+/-0.2)/r 2 n cm -2 s -1

7. NASA 2001 Mars Odyssey page 7 Workshop HEND - 2002 Russian Aviation and Space Agency Institute for Space Research Background and efficiency estimations

8. NASA 2001 Mars Odyssey page 8 Workshop HEND - 2002 Russian Aviation and Space Agency Institute for Space Research Results of Calibration measurements for Qualification Unit

9. NASA 2001 Mars Odyssey page 9 Workshop HEND - 2002 Russian Aviation and Space Agency Institute for Space Research Results of Calibration measurements for Qualification Unit

10. NASA 2001 Mars Odyssey page 10 Workshop HEND - 2002 Russian Aviation and Space Agency Institute for Space Research Future tasks