Post on 04-Jan-2016
description
2001 Mars Odysseypage 1
W o r k s h o p H E N D - 2003
Institute for Space Research, June 9 - 11, 2003
HENDHEND physical physical calibrationscalibrations:: status status reportreport
A. Kozyrev, S. Charyshnikov, V. Grinkov,, M. Litvak, I. Mitrofanov, A. Sanin, V. Tret’yakov
Institute for Space Research
V. Shvetsov, G. Timoshenko, A. KrylovJoint Institute for Nuclear Research
2001 Mars Odysseypage 2
W o r k s h o p H E N D - 2003
Institute for Space Research, June 9 - 11, 2003
Schematic design of HENDSchematic design of HEND
2001 Mars Odysseypage 3
W o r k s h o p H E N D - 2003
Institute for Space Research, June 9 - 11, 2003
Schematic design of sensor LD (Left) and Schematic design of sensor LD (Left) and SD (Right) for epithermal neutronsSD (Right) for epithermal neutrons
2001 Mars Odysseypage 4
W o r k s h o p H E N D - 2003
Institute for Space Research, June 9 - 11, 2003
Components of Components of SD and LD SD and LD
sensorssensors
2001 Mars Odysseypage 5
W o r k s h o p H E N D - 2003
Institute for Space Research, June 9 - 11, 2003
He3+n→H3+p+ Etotal
Etotal = 0.764 MeV
E(H3) = 1/4 Etotal = 0.191 MeV
E(p) = 3/4 Etotal = 0.573 MeV
¼ Etotal
TRITON¾ Etotal
PROTON
2001 Mars Odysseypage 6
W o r k s h o p H E N D - 2003
Institute for Space Research, June 9 - 11, 2003
Measured spectrum of counts
of MD sensor is represented in 16
channels
2001 Mars Odysseypage 7
W o r k s h o p H E N D - 2003
Institute for Space Research, June 9 - 11, 2003
Schematic design Schematic design of stilbene and of stilbene and
CsI scintillation CsI scintillation detectorsdetectors
2001 Mars Odysseypage 8
W o r k s h o p H E N D - 2003
Institute for Space Research, June 9 - 11, 2003
Neutron
Recoil protonRecoil proton
Registration of neutrons on recoil
protons
2001 Mars Odysseypage 9
W o r k s h o p H E N D - 2003
Institute for Space Research, June 9 - 11, 2003
Proton
Separation between background and recoil
protons is done by help of anticoincidence circuit based
on CsI crystal which surrounds stilbene detector in
direction of open space
2001 Mars Odysseypage 10
W o r k s h o p H E N D - 2003
Institute for Space Research, June 9 - 11, 2003
Photon
Distinguishing between neutron and gamma signal in
stilbene crystal is done by help of electronic pulse shape in the
stilbene crystal
2001 Mars Odysseypage 11
W o r k s h o p H E N D - 2003
Institute for Space Research, June 9 - 11, 2003
Energy range:
LD: 10.0 eV - 1.0 MeV MD: 0.4 eV -100.0 keV SD: 0.4 eV - 1.0 keV
IN/SC/N: 850 keV – 15.0 MeV
IN/SC/G: 60 keV– 2.0 MeV
OUT/SC: 30 keV – 1.0 MeV
PerformancePerformance
2001 Mars Odysseypage 12
W o r k s h o p H E N D - 2003
Institute for Space Research, June 9 - 11, 2003
18/02/2002 24/07/2002 27/12/2002 01/06/2003
Maping(1 year 4 month )
First ThirdSecond
StabilityStability spectra and spectra and temperature during mappingtemperature during mapping
18/02/2002-18/04/20022 month
10/09/2002-10/11/20022 month
01/04/2003-01/06/20032 month
2001 Mars Odysseypage 13
W o r k s h o p H E N D - 2003
Institute for Space Research, June 9 - 11, 2003
LD MD
Stilbene CsI(Tl)
Stability Stability spectra spectra duringduring mapping mapping
2001 Mars Odysseypage 14
W o r k s h o p H E N D - 2003
Institute for Space Research, June 9 - 11, 2003
Stability Stability temperature temperature duringduring mapping mapping
-15 < tHEND < +15
First Second Third
• t1- temperature of main electronic board
• t2- temperature of HV board
• t3- temperature of stilbene electronic board
-15
+15
2001 Mars Odysseypage 15
W o r k s h o p H E N D - 2003
Institute for Space Research, June 9 - 11, 2003
Calibration FacilityCalibration Facility
2001 Mars Odysseypage 16
W o r k s h o p H E N D - 2003
Institute for Space Research, June 9 - 11, 2003
Source of neutronsFlux ~ 106 n cm2 /sec
d(T,n) (15 MeV n)d(D,n) 3He (5 MeV n)7Li(p,n)7Be (< 1 MeV n)
Calibration FacilityCalibration Facility
2001 Mars Odysseypage 17
W o r k s h o p H E N D - 2003
Institute for Space Research, June 9 - 11, 2003
Pu-Be source: 3.8 MeV(29.6+/-0.2)/r2n cm-2 s-1
Cf source: 2.1 MeV(13.2+/-0.2)/r2n cm-2 s-1
Calibration FacilityCalibration Facility
2001 Mars Odysseypage 18
W o r k s h o p H E N D - 2003
Institute for Space Research, June 9 - 11, 2003
Calibration measurements resultsCalibration measurements results
2001 Mars Odysseypage 19
W o r k s h o p H E N D - 2003
Institute for Space Research, June 9 - 11, 2003
10-1 100 101
0.0
0.2
0.4
0.6
SIMULATION FU-1 FU-2
Response Function of MD sensor
S, c
m2
E, MeV
Calibration measurements resultsCalibration measurements results
2001 Mars Odysseypage 20
W o r k s h o p H E N D - 2003
Institute for Space Research, June 9 - 11, 2003
Simulation response functionSimulation response function
10-7 10-6 10-5 10-4 10-3 10-2 10-1 100 101 1020.01
0.1
1
Response function for LD sensor
S, c
m2
E, MeV
SIMULATION FOR HEND AS AN ASSEMBLY SIMULATION SINGLE DETECTOR
2001 Mars Odysseypage 21
W o r k s h o p H E N D - 2003
Institute for Space Research, June 9 - 11, 2003
Response functions of LD, MD and SC/neutron sensors allow to fit data of #2, #3 and #4 periapses
with function of type E-
HEND energy rangeHEND energy range
2001 Mars Odysseypage 22
W o r k s h o p H E N D - 2003
Institute for Space Research, June 9 - 11, 2003
Model neutron
spectra on Mars orbit
Response function
of HEND sensors
Calculation
Model count of HEND neutron sensor
Real count of HEND neutron sensor
Calculation (Pearson criteria)
Probability of aligning
model
Using response functionUsing response function
2001 Mars Odysseypage 23
W o r k s h o p H E N D - 2003
Institute for Space Research, June 9 - 11, 2003
ConclusionConclusion: During mapping, spectra of HEND sensors were stable
During mapping, temperature of HEND instrument were lie in the range of +/- 15 °C
HEND numerical model as an assembly were simulated for neutron LD, MD and SD sensor
Future task:Future task: Building of HEND numerical model with taking into account the spacecraft model
Physical calibration and simulation of SC sensor to establishing of corresponds between Flight and Qualification units
Physical calibration of HEND instrument with respect to gamma-rays and charge particles