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Selective Detectors for High Energy Photons and Electrons

Heusch, Clemens A. and Prescott, Charles Y. (1964) Selective Detectors for High Energy Photons and Electrons. Synchrotron Laboratory, CTSL-41. California Institute of Technology , Pasadena, CA. (Unpublished)

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For fast identification of high-energy electrons and photons in heavy backgrounds, a counter was developed consisting of successive layers of lucite and lead. Čerenkov radiation emitted in the lucite slabs is collected onto the photocathode of one 5 inch phototube. The geometry as well as the thickness of inserted lead converters can be adapted to kinematical requirements. At 1 BeV/c incoming momentum, the rejection ratio of e, γ showers vs. π or μ is better than 100:1; i.e., proper discrimination setting will allow rejection of 99% of all π's and μ's, while only 1% of e's and γ's will be lost. Protons make no pulses at all. The response over the face of the counter is uniform. The properties of the counter are checked in detail against the behavior of lead glass Čerenkov counters, and of lead scintillator sandwiches of comparable geometry. Many applications appear to favor this type of counter over others operating on conventional principles.

Item Type:Report or Paper (Technical Report)
Additional Information:© 1964 California Institute of Technology. We are indebted to R. L. Walker for providing the π and proton beams; to A. V. Tollestrup for his assistance in making suitable electronics available; and to both for interesting and useful discussions. Walter Nilsson skillfully assisted in building the counters. Elliott Bloom was helpful during the test runs.
Group:Synchrotron Laboratory
Funding AgencyGrant Number
Atomic Energy CommissionAT(11-1)-68
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Other Numbering System NameOther Numbering System ID
Series Name:Synchrotron Laboratory
Issue or Number:CTSL-41
Record Number:CaltechAUTHORS:20180201-145013465
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84635
Deposited By: Melissa Ray
Deposited On:02 Feb 2018 01:53
Last Modified:03 Oct 2019 19:20

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