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Experimental and calculated LET distributions in the Cosmos-2044 biosatellite orbitDuring the flight of the Cosmos-2044 biosatellite, joint U.S.S.R.-U.S.A. investigations of different characteristics of cosmic radiation (CR) in the near-Earth environment were carried out. The U.S. dielectric track detectors CR-39 and Soviet BYa- and BR-type nuclear photo-emulsions were used as detectors. The present work shows some results of experimental measurements of linear energy transfer (LET) spectra of CR particles obtained with the use of these detectors, which were placed both inside and outside the satellite. The LET spectra measurement with plastic detectors is composed of two parts: the measurement of galactic cosmic rays (GCR) particles, and of short-range particles. The contributions of these components to the total LET distribution at various thicknesses of the shielding were analyzed and the results of these studies are presented. Calculated LET spectra in the Cosmos-2044 orbit were compared with experimental data. On the basis of experimental and calculated values of the LET spectra, absorbed and equivalent CR doses were calculated. In the shielding range of 1-1.5 g cm-2, outside the spacecraft, the photo-emulsions yielded 10.3 mrad d-1 and 27.5 mrem d-1 (LET > or = 2 MeV cm-1) while the CR-39 yielded averages of 1.43 mrad d-1 and 13.4 mrem d-1 (LET > or = 40 MeV cm-1). Inside the spacecraft (> or = 10 g cm-2) the photo-emulsions yielded 8.9 mrad d-1 and 14.5 mrem d-1.
Document ID
20040090403
Acquisition Source
Johnson Space Center
Document Type
Reprint (Version printed in journal)
Authors
Dudkin, V. E.
(Research Center of Space Craft Radiation Safety Ministry of Public Health, Moscow, U.S.S.R)
Karpov, O. N.
Akopova, A. B.
Magradze, N. V.
Moiseenko, A. A.
Benton, E. V.
Frank, A. L.
Watts, J. W. Jr
Date Acquired
August 21, 2013
Publication Date
January 1, 1992
Publication Information
Publication: International Journal Of Radiation Applications And Instrumentation. Part D, Nuclear Tracks And Radiation Measurements
Volume: 20
Issue: 1
ISSN: 0735-245X
Subject Category
Aerospace Medicine
Funding Number(s)
CONTRACT_GRANT: NCC2-521
CONTRACT_GRANT: NAG9-235
Distribution Limits
Public
Copyright
Other
Keywords
NASA Program Radiation Health
Cosmos 2044 Project
Flight Experiment
NASA Discipline Number 00-00
Non-NASA Center
unmanned
NASA Discipline Radiation Health
NASA Program Flight
short duration
NASA Discipline Number 04-10

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