Tests of shielding effectiveness of Kevlar and Nextel onboard the International Space Station and the Foton-M3 capsule |
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Authors: | M Pugliese V Bengin M Casolino V Roca A Zanini M Durante |
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Institution: | 1. Dipartimento di Scienze Fisiche, Università di Napoli Federico II, Complesso Universitario Monte Sant’Angelo Via Cinthia, 80126, Naples, Italy 2. Sezione di Napoli, Istituto Nazionale di Fisica Nucleare, Naples, Italy 3. Institute of Biomedical Problems (IMBP), Moscow, Russia 4. Università di Roma Tor Vergata, Rome, Italy 5. Sezione di Roma Tor Vergata, Istituto Nazionale di Fisica Nucleare, Rome, Italy 6. Sezione Torino, Istituto Nazionale di Fisica Nucleare, Turin, Italy 7. Gesellschaft für Schwerionenforschung, Darmstadt, Germany
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Abstract: | Radiation assessment and protection in space is the first step in planning future missions to the Moon and Mars, where mission
and number of space travelers will increase and the protection of the geomagnetic shielding against the cosmic radiation will
be absent. In this framework, the shielding effectiveness of two flexible materials, Kevlar and Nextel, were tested, which
are largely used in the construction of spacecrafts. Accelerator-based tests clearly demonstrated that Kevlar is an excellent
shield for heavy ions, close to polyethylene, whereas Nextel shows poor shielding characteristics. Measurements on flight
performed onboard of the International Space Station and of the Foton-M3 capsule have been carried out with special attention
to the neutron component; shielded and unshielded detectors (thermoluminescence dosemeters, bubble detectors) were exposed
to a real radiation environment to test the shielding properties of the materials under study. The results indicate no significant
effects of shielding, suggesting that thin shields in low-Earth Orbit have little effect on absorbed dose. |
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