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Design and performance of an actively collimated phoswich system for X-ray astronomyThe design and performance of a phoswich type scintillation detector system having 34 sq cm effective collecting area and a sensitivity of 3 x 10 to the -5th power photons/sq cm/s/keV for balloon-borne cosmic X-ray source observations are discussed. The various shield anticoincidence systems are evaluated for effectiveness in reduction of the system background. The total background of nominally 4 x 10 to the -4th power counts/sq cm/s/keV is analyzed and found to consist of aperture flux, K-escape X-rays from the shielding, leakage, and degradation of gamma-rays through the shielding, and several particle induced effects. The background analysis suggests an ultimate practical upper limit of about 8 x 10 to the -5th power counts/sq cm/s/keV might be attainable beyond which further sensitivity improvements will require increased collecting area or a basically differing design approach.
Document ID
19780051252
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Matteson, J. L.
(California Univ. La Jolla, CA, United States)
Nolan, P. L.
(California Univ. La Jolla, CA, United States)
Paciesas, W. S.
(California Univ. La Jolla, CA, United States)
Pelling, R. M.
(California, University La Jolla, Calif., United States)
Date Acquired
August 9, 2013
Publication Date
December 1, 1977
Publication Information
Publication: Space Science Instrumentation
Volume: 3
Subject Category
Instrumentation And Photography
Accession Number
78A35161
Funding Number(s)
CONTRACT_GRANT: NGL-05-005-003
Distribution Limits
Public
Copyright
Other

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