LET calibration for CR-39 detectors in different oxygen environments |
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Institution: | 1. NASA-Johnson Space Center, 2101 Nasa Road 1, Houston, TX 77058, USA;2. Universities Space Research Association, 2101 Nasa Parkway, Houston, TX 77058, USA;3. Eril Research Inc., 1110 Innovation Way, Suite 100, Stillwater, OK 74074, USA |
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Abstract: | High LET (linear energy transfer) radiation is the main contributor to the radiation field in low Earth orbit (LEO) in terms of dose equivalent. CR-39 plastic nuclear track detectors (PNTDs) can measure the LET spectrum and charge spectrum for the complicated radiation field in space. Previous research indicated that the sensitivity of CR-39 is different for CR-39 PNTDs working in different oxygen environments. LET calibration for CR-39 detectors in different oxygen environments is needed. Almost all the previous LET calibration work was carried out for CR-39 detectors in good-oxygen condition, LET calibration work for CR-39 in poor-oxygen condition has not been conducted until our work. Systematic LET calibrations were carried out by JSC-SRAG (Space Radiation Analysis Group) for CR-39 detectors working in different oxygen environments and abundant results of LET calibrations were obtained. This paper introduces the method for CR-39 LET calibration, presents and discusses the calibration results and some applications. |
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