SSPM Detector for Polarized Target Scintillator Readout

Award Information
Agency: Department of Energy
Branch: N/A
Contract: DE-FG02-07ER84752
Agency Tracking Number: 82895
Amount: $749,996.00
Phase: Phase II
Program: SBIR
Awards Year: 2008
Solicitation Year: 2007
Solicitation Topic Code: 26
Solicitation Number: DE-PS02-06ER06-30
Small Business Information
44 Hunt Street, Watertown, MA, 02472
DUNS: 073804411
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 James Christian
 (617) 668-6800
Business Contact
 Gerald Entine
Title: Dr
Phone: (617) 668-6800
Research Institution
Nuclear physics investigations require photodetectors that operate in harsh conditions (e.g., temperatures of 5 K and below, and magnetic fields greater than 1 T); yet existing methods of photodetection cannot provide the needed quality of data at a reasonable cost. This project will develop a photodetector that will tolerate these conditions and can be made in a commercially available, low-cost semiconductor fabrication process. Phase I demonstrated the operation of CMOS photodetectors at 5 K. The prototype photodiodes showed high gains at these low temperatures when operated below breakdown, or in proportional mode. The detailed radiometric performance indicated that a photodetector operated in proportional mode can meet the demands of experiments in these harsh environments. In Phase II, a prototype instrument will be developed to collect data in a nuclear physics experiment. The device will consist of solid-state photodiodes operated in proportional mode, and the instrument will be optimized in terms of gain, energy resolution, dark noise, and heat load. Once optimized, the photodetector will be packaged to allow for robust and sensitive operation for multiple applications. Commercial Applications and Other Benefits as described by the awardee: A photodetector that can operate at low temperatures (< 5 K) and in large magnetic fields, has sufficiently high gain, and provides high detection efficiency (> 10%) would be a marketable device for novel scientific experiments that operate under these extreme conditions. The detector also should find use with positron emission topography at cryogenic temperature, or as LXe detectors for detecting Weakly Interacting Massive Particles.

* Information listed above is at the time of submission. *

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