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Charged particle LET-spectra measurements aboard LDEFThe linear energy transfer (LET) spectra of charged particles was measured in the 5 to 250 keV/micron (water) interval with CR-39 and in the 250 to 1000 keV/micron (water) interval with polycarbonate plastic nuclear track detectors (PNTDs) under different shielding depths in the P0006 experiment. The optimal processing conditions were determined for both PNTDs in relation to the relatively high track densities due to the long term exposure in space. The total track density was measured over the selected samples, and tracks in coincidence on the facing surfaces of two detector sheets were selected for measuring at the same position on each sheet. The Short Range (SR) and Galactic Cosmic Ray (GCR) components were measured separately. The integral dose and dose rate spectra of charged particles are also given. The high LET portion of the LET spectra was measured with high statistical accuracy. This is a unique result of this experiment due to the low flux of this type of particle under typical shielding conditions.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Csige, I.
(San Francisco Univ. CA., United States)
Benton, E. V.
(San Francisco Univ. CA., United States)
Frank, A. L.
(San Francisco Univ. CA., United States)
Frigo, L. A.
(San Francisco Univ. CA., United States)
Benton, E. R.
(San Francisco Univ. CA., United States)
Parnell, T. A.
(NASA Marshall Space Flight Center Huntsville, AL., United States)
Watts, John W., Jr.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
September 6, 2013
Publication Date
June 1, 1991
Publication Information
Publication: NASA, Langley Research Center, First LDEF Post-Retrieval Symposium Abstracts
Subject Category
Atomic And Molecular Physics
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.

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