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Radiation Protection Dosimetry 85:121-124 (1999)
© 1999 Oxford University Press

Extra Dose Due to Extravehicular Activity During the NASA4 Mission, Measured by an On-Board TLD System

S. Deme, I. Apáthy, I. Héjja, E. Láng and I. Fehér

A microprocessor-controlled on-board TLD system, 'Pille'96', was used during the NASA4 (1997) mission to monitor the cosmic radiation dose inside the Mir Space Station and to measure the extra dose to two astronauts in the course of their extravehicular activity (EVA). For the EVA dose measurements, CaSO4:Dy bulb dosemeters were located in specially designed pockets of the ORLAN spacesuits. During an EVA lasting 6 h, the dose ratio inside and outside Mir was measured. During the EVA, Mir crossed the South Atlantic Anomaly three times. Taking into account the influence of these three crossings the mean EVA/internal dose rate ratio was 3.2. Internal dose mapping using CaSO4:Dy dosemeters gave mean dose rates ranging from 9.3 to 18.3 µGy.h-1 at locations where the shielding effect was not the same. Evaluation results of the high temperature region of LiF dosemeters are given to estimate the mean LET.


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Home page
 Radiat Prot DosimetryHome page
S. Deme, I. Apathy, T. Pazmandi, E. R. Benton, G. Reitz, and Y. Akatov
On-board TLD measurements on MIR and ISS
Radiat Prot Dosimetry, September 1, 2006; 120(1-4): 438 - 441.
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