Computer Science
Scientific paper
Mar 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995hlps.reptt.....&link_type=abstract
In its High LET, Passive Space Radiation Dosimetry and Spectrometry 4 p (SEE N95-25911 08-72)
Computer Science
Dosimeters, Extraterrestrial Radiation, Ionizing Radiation, Linear Energy Transfer (Let), Radiation Dosage, Radiation Measurement, Space Shuttle Missions, Galactic Cosmic Rays, Proportional Counters, Protons, Thermoluminescence, Trapped Particles
Scientific paper
Beginning with the STS-42 mission, this laboratory began participating in instrument comparison studies in which space radiation was measured contiguously by passive and active methods. The active instrument was the RME-3 microdosimeter. This instrument measures four-channel LET spectra and employs a tissue-equivalent proportional counter. It is sensitive to the full LET range of ionizing radiation present. Our area passive dosimeter, the RME APD, contained arrays of plastic nuclear track detectors (PNTD's) and thermoluminescent detectors (TLD's). The PNTD's measure LET spectra, while the TLD's measure total absorbed dose. The object of this experiment is to compare the active and passive measurements on the basis of LET spectra, total absorbed dose, and dose equivalent. The STS-42 mission was launched on January 22, 1992, with a flight duration of 8.052 days. The orbit had an inclination of 57 deg and an altitude of 302 km. The shuttle in this orbit is expected to encounter radiation levels dominated by galactic cosmic rays (GCR's) with a lesser contribution from trapped protons in the lower region of the South Atlantic Anomaly (SAA).
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