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Proceedings Paper

CMOS solid-state photomultipliers for high energy resolution calorimeters
Author(s): Erik B. Johnson; Christopher J. Stapels; Xiao Jie Chen; Chad Whitney; Eric C. Chapman; Guy Alberghini; Rich Rines; Frank Augustine; Rory Miskimen; Don Lydon; James Christian
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Paper Abstract

High-energy, gamma-ray calorimetry typically employs large scintillation crystals coupled to photomultiplier tubes. These calorimeters are segmented to the limits associated with the costs of the crystals, photomultiplier tubes, and support electronics. A cost-effective means for construction of a calorimeter system is to use solid-state photomultipliers (SSPM) with front-end electronics, which is at least half the cost, but the SSPM must provide the necessary energy resolution defined by the physics goals. One experiment with plans to exploit this advantage is an upgrade to the PRIMEX experiment at Jefferson Laboratories. We have developed a large-area SSPM (1 cm × 1 cm) for readout of large scintillation crystals. As PbWO4 has excellent properties (small Molière radius and radiation hard) for high-energy gamma-rays (>1 GeV) but low light yields (~150 photons/MeV at 0 °C), evaluation of the SSPM and support readout electronics with LaBr3 provides a measure of the device performance. Using the known detection efficiency and dark current of the SSPM, an excess noise factor associated with after pulsing and cross talk is determined. The contribution to the energy resolution from the detector module is calculated as <1% for gamma rays greater than ~2.5 GeV (0.7% at 4.5 GeV).

Paper Details

Date Published: 27 September 2011
PDF: 14 pages
Proc. SPIE 8142, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XIII, 81420M (27 September 2011); doi: 10.1117/12.893766
Show Author Affiliations
Erik B. Johnson, Radiation Monitoring Devices, Inc. (United States)
Christopher J. Stapels, Radiation Monitoring Devices, Inc. (United States)
Xiao Jie Chen, Radiation Monitoring Devices, Inc. (United States)
Chad Whitney, Radiation Monitoring Devices, Inc. (United States)
Eric C. Chapman, Radiation Monitoring Devices, Inc. (United States)
Guy Alberghini, Radiation Monitoring Devices, Inc. (United States)
Rich Rines, Radiation Monitoring Devices, Inc. (United States)
Frank Augustine, Augustine Engineering (United States)
Rory Miskimen, Univ. of Massachusetts Amherst (United States)
Don Lydon, DSL Consulting (United States)
James Christian, Radiation Monitoring Devices, Inc. (United States)


Published in SPIE Proceedings Vol. 8142:
Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XIII
Larry A. Franks; Ralph B. James; Arnold Burger, Editor(s)

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