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Pyroelectric materials as electronic pulse detectors of ultraheavy nucleiThe design and testing of ultraheavy-nucleus pulse detectors based on pyroelectric materials are reported, extending the preliminary findings of Tuzzolino (1983) and Simpson and Tuzzolino (1983). Uranium-ion beams of about 240 MeV/u are detected by a 39.5-micron-thick Si detector, degraded to about 175 MeV/u by Al absorbers, and then strike 700-micron-thick polyvinylidene fluoride or 1000-micron-thick LiTaO3 pyroelectric samples. Both detector systems are connected to a coincidence circuit via charge-sensitive preamplifiers, shaping amplifiers with 30-microsec effective time constants, and electronic discriminators. Sample spectra are shown, and the pulse heights measured are found to agree with theoretical calculations to within a factor of about 2. The response of the pyroelectric materials is found to be unaffected by exposure to about 10 Mrad of 2-7-MeV/u heavy ion radiation. With further study and improvement of the detection sensitivity, devices of this type could be applied to large-area space measurements of low ultraheavy-ion fluxes.
Document ID
19840040653
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Simpson, J. A.
(Chicago Univ. Chicago, IL, United States)
Tuzzolino, A. J.
(Chicago, University Chicago, IL, United States)
Date Acquired
August 12, 2013
Publication Date
February 20, 1984
Publication Information
Publication: Physical Review Letters
Volume: 52
ISSN: 0031-9007
Subject Category
Instrumentation And Photography
Accession Number
84A23440
Funding Number(s)
CONTRACT_GRANT: NGL-14-001-006
CONTRACT_GRANT: NGL-14-001-258
Distribution Limits
Public
Copyright
Other

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