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An instrument to measure the spectrum of cosmic ray iron and other nuclei to above 100 GeV-nucleonA balloon-borne detector system for extending the study of cosmic ray composition to the energy region beyond 100 GeV/nucleon is described. The instrument incorporates an ionization calorimeter and a gas Cherenkov counter filled with freon for the determination of energies, and a charge module, consisting of scintillation and a lucite Cherenkov counter, for determining the charge of the incoming particle. The scintillators were utilized to determine the position of the incoming particle in addition to its charge. The characteristics of these detectors with respect to resolution, and the methods employed in laboratory calibration, cross-checks with flight data and actual performance in the flights are described in detail. Monte Carlo simulation of the ionization calorimeter and comparison of the response of the calorimeter and gas Cherenkov counter for complex nuclei was used to convert the observed calorimeter signal to absolute energy in a consistent manner.
Document ID
19790005816
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Arens, J. F. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Balasubrahmanyan, V. K. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Ormes, J. F. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Siohan, F. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Schmidt, W. K. H. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Simon, M. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Spiegelhauer, H. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 3, 2013
Publication Date
November 1, 1978
Subject Category
Space Radiation
Report/Patent Number
NASA-TM-79677
Accession Number
79N13987
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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