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Detection Efficiency of the CRIS Scintillating Optical Fiber Hodoscope

Binns, W. R. and Crary, D. J. and Cummings, A. C. and Geer, L. Y. and Klarmann, J. and Lawrence, David J. and Mewaldt, R. A. (1993) Detection Efficiency of the CRIS Scintillating Optical Fiber Hodoscope. In: Proceedings of the 23rd International Cosmic Ray Conference. Vol.2. World Scientific , Singapore, pp. 532-535. http://resolver.caltech.edu/CaltechAUTHORS:20141021-155634792

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Abstract

Measurements of the detection efficiency of a Scintillating Optical Fiber Trajectory (SOFT) detector for 660 MeV/n Carbon, Boron, Beryllium and Lithium nuclei and for 300 MeV/n Fe nuclei are described. Detection efficiencies of 99.8%, 98.7%, 97.5%, and 93.8% for C, B, Be, and Li respectively were obtained for a single layer of fibers at an angle of incidence of 30°. These fibers had a black coating of extramural absorber (EMA) to optically decouple the fibers. Somewhat better detection efficiencies were obtained for optically coupled fibers (no EMA). The detection efficiencies for iron nuclei were ~99.7%. We have used these results to estimate the event detection efficiencies of the fiber hodoscope which is planned for use in the Cosmic Ray Isotope Spectrometer (CRIS) (Stone, et al., 1989) experiment on the Advanced Composition Explorer (ACE). We find that for the highest energy Lithium nuclei which will stop in CRIS, the detection efficiency is about 89% for 6 plane events and about 99% for 5 plane events at 30°.


Item Type:Book Section
Related URLs:
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http://adsabs.harvard.edu/full/1993ICRC....2..532BADSArticle
Additional Information:Copyright University of Calgary. Provided by the NASA Astrophysics Data System. This work was supported in part by NASA grants and in part by the McDonnell Center for the Space Sciences at Washington University.
Group:Space Radiation Laboratory
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Funding AgencyGrant Number
NASAUNSPECIFIED
McDonnell Center for the Space Sciences, Washington UniversityUNSPECIFIED
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Space Radiation Laboratory1993-19
Record Number:CaltechAUTHORS:20141021-155634792
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20141021-155634792
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50643
Collection:CaltechAUTHORS
Deposited By: Deborah Miles
Deposited On:24 Oct 2014 15:53
Last Modified:24 Oct 2014 15:53

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