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Dosimetric results from the Mir orbital station
E R Benton1, E V Benton, A L Frank
1Eril Research, Inc, San Rafael, CA 94915-0788, USA. eric@erilresearch.com
Radiation Protection Dosimetry
|October 18, 2002
Summary
Space radiation dosimetry on Mir revealed that increased shielding reduced dose rates but elevated dose equivalent rates. Secondary particles, not primary HZE particles, dominated high-energy radiation.
Area of Science:
- Space Science
- Radiation Physics
- Dosimetry
Background:
- The Mir Orbital Station served as a crucial platform for in-situ space radiation measurements.
- Understanding space radiation is vital for astronaut safety and mission planning.
Purpose of the Study:
- To conduct space radiation dosimetry measurements inside the Mir Orbital Station.
- To analyze absorbed dose, Linear Energy Transfer (LET) spectra, and dose equivalent.
- To investigate the impact of shielding on radiation characteristics.
Main Methods:
- Utilized passive detectors, including Thermoluminescent Detectors (TLDs) for absorbed dose.
- Employed CR-39 plastic nuclear track detectors (PNTDs) to measure LET spectra.
- Combined data from TLDs and CR-39 PNTDs for comprehensive dose assessment.
Main Results:
- Absorbed dose rates decreased with increased shielding.
- Dose equivalent rates and average quality factors increased with shielding.
- Secondary particles from proton interactions were the primary contributors to high LET spectra (>100 keV/µm).
- Mean quality factor varied from 1.7 to 2.1 based on location within Mir.
Conclusions:
- Shielding significantly influences space radiation characteristics, increasing dose equivalent and quality factor.
- Secondary particle production is a critical factor in the high-energy radiation environment.
- Spatial variations in radiation quality factor were observed within the Mir station.
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