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Record Details

Record 60 of 19976
The UCSD high energy X-ray timing experiment cosmic ray particle anticoincidence detector
Author and Affiliation:
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)
Abstract: The 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.
Publication Date: Jan 01, 1991
Document ID:
19930050390
(Acquired Dec 28, 1995)
Accession Number: 93A34387
Subject Category: SPACECRAFT INSTRUMENTATION
Document Type: Conference Paper
Publication Information: 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); p. 193-202.; (SEE A93-34376)
Publisher Information: Society of Photo-Optical Instrumentation Engineers, Bellingham, WA, United States
Contract/Grant/Task Num: NAS5-30720
Financial Sponsor: NASA; United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 10p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: COINCIDENCE CIRCUITS; COSMIC RAYS; HIGH ENERGY INTERACTIONS; RADIATION COUNTERS; SCINTILLATION COUNTERS; X RAY TIMING EXPLORER; CHARGED PARTICLES; COMPUTER AIDED DESIGN; COSMIC X RAYS
Imprint And Other Notes: 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), p. 193-202.
Availability Source: Other Sources
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