NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Measurements of the linear energy transfer spectra on the Mir orbital station and comparison with radiation transport modelsA 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.
Document ID
20040089779
Acquisition Source
Langley Research Center
Document Type
Reprint (Version printed in journal)
Authors
Badhwar, G. D.
(NASA Johnson Space Center Houston TX United States)
Konradi, A.
Atwell, W.
Golightly, M. J.
Cucinotta, F. A.
Wilson, J. W.
Petrov, V. M.
Tchernykh, I. V.
Shurshakov, V. A.
Lobakov, A. P.
Date Acquired
August 21, 2013
Publication Date
March 1, 1996
Publication Information
Publication: Radiation measurements
Volume: 26
Issue: 2
ISSN: 1350-4487
Subject Category
Life Sciences (General)
Distribution Limits
Public
Copyright
Other
Keywords
Mir Project
long duration
NASA Center JSC
STS Shuttle Project
NASA Program Radiation Health
manned
short duration
NASA Discipline Radiation Health
Flight Experiment
NASA Discipline Number 45-10

Available Downloads

There are no available downloads for this record.
No Preview Available