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Energy Calibration of the Scintillating Optical Fiber Calorimeter Chamber (SOFCAL)The Scintillating Optical Fiber Calorimeter (SOFCAL) detector is designed to make direct measures of the primary cosmic ray spectrum from -200 GeV/amu - 20 TeV/amu. The primary particles are resolved into groups according to their charge (p, He, CNO, Medium Z, Heavy Z) using both active and passive components integrated into the detector. The principal part of SOFCAL is a thin ionization calorimeter that measures the electromagnetic cascades that result from these energetic particles interacting in the detector. The calorimeter is divided into two sections: a thin passive emulsion/x-ray film calorimeter, and a fiber calorimeter that uses crossing layers of small scintillating optical fibers to sample the energy deposition of the cascades. The energy determination is made by fitting the fiber data to transition curves generated by Monte Carlo simulations. The fiber data must first be calibrated using the electron counts from the emulsion plates in the calorimeter for a small number of events. The technique and results of this calibration will be presented together with samples of the data from a balloon flight.
Document ID
19990098444
Acquisition Source
Marshall Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Christl, M. C.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Fountain, W. F.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Parnell, T.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Roberts, F. E.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Gregory, J. C.
(Alabama Univ. Huntsville, AL United States)
Johnson, J.
(Alabama Univ. Huntsville, AL United States)
Takahashi, Y.
(Alabama Univ. Huntsville, AL United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1997
Subject Category
Optics
Meeting Information
Meeting: Cosmic Ray
Country: South Africa
Start Date: July 28, 1997
End Date: August 8, 1997
Distribution Limits
Public
Copyright
Other

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