Measurements of the linear energy transfer spectra on the Mir orbital station and comparison with radiation transport models
| Autor: | F.A. Cucinotta, Vyacheslav Shurshakov, M.J. Golightly, W. Atwell, A. Konradi, A.P. Lobakov, I.V. Tchernykh, Gautam D. Badhwar, V.M. Petrov, John W. Wilson |
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| Rok vydání: | 1996 |
| Předmět: |
Proton
Linear energy transfer Proportional counter Cosmic ray Radiation Dosage symbols.namesake Optics Radiation Monitoring Neutron Linear Energy Transfer Solar Activity Radiometry Instrumentation Physics Neutrons Range (particle radiation) Radiation business.industry Models Theoretical Space Flight South Atlantic Anomaly Computational physics Van Allen radiation belt symbols Protons business Brazil Cosmic Radiation |
| Zdroj: | Radiation measurements. 26(2) |
| ISSN: | 1350-4487 |
| Popis: | A tissue equivalent proportional counter designed to measure the linear energy transfer spectra (LET) in the range 0.2-1250 keV/micrometer was flown in the Kvant module on the Mir orbital station during September 1994. The spacecraft was in a 51.65 degrees inclination, elliptical (390 x 402 km) orbit. This is nearly the lower limit of its flight altitude. The total absorbed dose rate measured was 411.3 +/- 4.41 microGy/day with an average quality factor of 2.44. The galactic cosmic radiation (GCR) dose rate was 133.6 microGy/day with a quality factor of 3.35. The trapped radiation belt dose rate was 277.7 microGy/day with an average quality factor of 1.94. The peak rate through the South Atlantic Anomaly was approximately 12 microGy/min and nearly constant from one pass to another. A detailed comparison of the measured LET spectra has been made with radiation transport models. The GCR results are in good agreement with model calculations; however, this is not the case for radiation belt particles and again points to the need for improving the AP8 omni-directional trapped proton models. |
| Databáze: | OpenAIRE |
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