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The UCSD high energy X-ray timing experiment cosmic ray particle anticoincidence detectorThe HEXTE, part of the X-Ray Timing Explorer (XTE), is designed to make high sensitivity temporal and spectral measurements of X-rays with energies between 15 and 250 keV using NaI/CsI phoswich scintillation counters. To achieve the required sensitivity it is necessary to provide anticoincidence of charged cosmic ray particles incident upon the instrument, some of which interact to produce background X-rays. The proposed cosmic ray particle anticoincidence shield detector for HEXTE uses a novel design based on plastic scintillators and wavelength-shifter bars. It consists of five segments, each with a 7 mm thick plastic scintillator, roughly 50 cm x 50 cm in size, coupled to two wavelength-shifter bars viewed by 1/2 inch photomultiplier tubes. These segments are configured into a five-sided, box-like structure around the main detector system. Results of laboratory testing of a model segment, and calculations of the expected performance of the flight segments and particle anticoincidence detector system are presented to demonstrate that the above anticoincidence detector system satisfies its scientific requirements.
Document ID
19930050390
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hink, P. L.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Rothschild, R. E.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Pelling, M. R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Macdonald, D. R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Gruber, D. E.
(California Univ. La Jolla, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1991
Publication Information
Publication: In: EUV, X-ray, and gamma-ray instrumentation for astronomy II; Proceedings of the Meeting, San Diego, CA, July 24-26, 1991 (A93-34376 13-35)
Publisher: Society of Photo-Optical Instrumentation Engineers
Subject Category
Spacecraft Instrumentation
Accession Number
93A34387
Funding Number(s)
CONTRACT_GRANT: NAS5-30720
Distribution Limits
Public
Copyright
Other

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