1. Radiation dosimetry in space by means of compact passive luminescent detectors
Olivier Van Hoey, Alessio Parisi, Werner Schoonjans, Filip Vanhavere
The Belgian Nuclear Research Center SCK•CEN, Mol, Belgium

2. Radiation dosimetry in space

3. Radiation dosimetry in space
Dosimetry is required in space for assessing radiation effects on
Astronauts
Plants and micro-organisms
Instrumentation
Radiation field in space is very complex
Electrons, protons, heavier nuclei, muons, neutrons
Up to extremely high energies
Dosimetry in space requires a combined approach
Models of the radiation field and radiation transport simulations
Ambient monitoring with active and passive radiation detectors
Personal monitoring with personal dosimeters

4. Passive radiation detectors

5. Passive radiation detectors
Stimulated luminescence detectors
Optically stimulated luminescence (OSL)
Thermoluminescence (TL)
Sensitive for low LET radiation (< 10 keV/µm)
Detection of photons, electrons, protons, muons
Track etch detectors
Sensitive for high LET radiation (> 10 keV/µm)
Detection of heavier nuclei and neutrons
Labour intensive and complex analysis

6. TL detectors Detector types Annealing in oven Reading in Harshaw 5500
TLD Poland
6LiF:Mg,Ti (MTS-6) and 7LiF:Mg,Ti (MTS-7)
6LiF:Mg,Cu,P (MCP-6) and 7LiF:Mg,Cu,P (MCP-7)
Annealing in oven
Reading in Harshaw 5500
Heated with hot nitrogen gas
Hamamatsu RC095 HA PMT

7. TL detectors

8. Integration interval 100°C – 260°C
TL detectors
Integration interval 100°C – 260°C

9. OSL detectors Detector type Bleaching by one day exposure to sun light
Landauer
Al2O3:C (Luxel)
Bleaching by one day exposure to sun light
Reading with self-developed argon ion laser system

10. OSL detectors mirror filter objective Ar+ laser Luxel filter PMT
OSL Luxel: peak between 370 nm and 440 nm
Laser: two emission lines at 488 nm (close to Luxel resonance peak) and nm
Melles Griot type 35 LAP 431 Ar-ion laser
Microscope objective to expand beam diameter 8X
Electronic shutter to avoid switching of the laser
Electron Tubes type 9924 PMT sensitivity peak between 300 nm and 500 nm
Melles Griot type 03 FCG 465 long-pass filter just behind microscope objective blocks laser light interfering with Luxel OSL below 450 nm
3 Melles Griot type 03 FIV 026 interference filters just in front of the PMT transmit Luxel OSL from 390 nm to 430 nm
Luxel
filter
PMT

11. Integration interval 0 s – 100 s
OSL detectors
Integration interval 0 s – 100 s

12. Past, ongoing and future projects

13. DOSIS and DOSIS 3D Multilateral project lead by DLR since 2009
Monitoring the radiation environment in the Columbus module of the International Space Station
Study of the spatial and temporal variations in the radiation field
Variety of active and passive detectors

14. DOSIS and DOSIS 3D

15. DOSIS and DOSIS 3D

16. DOSIS and DOSIS 3D
Daily dose values for each experiment normalized to their average over all boxes

17. DOSIS and DOSIS 3D
Daily dose values for each box normalized to their average over all experiments
DI DII D3DI D3DII D3DIII D3DIV D3DV D3DVI D3DVII D3DVIII

18. DOSIS and DOSIS 3D [1] http://www.nmdb.eu/
[2]
[3]

19. DOSIS and DOSIS 3D
[1] private communication with Thomas Berger

20. Biological experiments
FOTON-M4
BASE B/C
BISTRO

21. Biological experiments
EXPOSE-E

22. PhD on luminescent detectors in space
Experimental characterization of luminescent detectors
Optimization of the read out protocols
Prediction of detection efficiency for different radiation types
Trying to combine measurements with different luminescent detectors to get the total dose without track etch detectors

23. Matroshka AstroRad Radiation Experiment on Orion EM-1

24. Matroshka AstroRad Radiation Experiment on Orion EM-1

25. Matroshka AstroRad Radiation Experiment on Orion EM-1