Low-cost Individual Digital Dosimeters using Solid State Photomultipliers

Award Information
Agency:
Department of Defense
Branch
Defense Threat Reduction Agency
Amount:
$353,250.00
Award Year:
2006
Program:
SBIR
Phase:
Phase II
Contract:
HDTRA1-07-C-0045
Agency Tracking Number:
T051-007-0068
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
RADIATION MONITORING DEVICES, INC.
44 Hunt Street, Watertown, MA, 02472
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
073804411
Principal Investigator:
James Christian
Group Leader
(617) 668-6801
jchristian@rmdinc.com
Business Contact:
Gerald Entine
President
(617) 668-6801
gentine@rmdinc.com
Research Institution:
n/a
Abstract
U.S. forces working in low-level radiation environments have unsatisfactory choices for monitoring radiation exposure. A solid-state photomultiplier (SSPM) uses an array of silicon based avalanche photodiodes (APD) to collect light and produce a signal proportional to the amount of light collected. The ability to produce arrays of APD's in a CMOS (Complimentary Metal Oxide Semiconductor) environment makes possible the production of miniaturized arrays integrated with the dosimeter electronics in a small silicon chip - the dosimeter on a chip. This technology represents a novel approach for collecting the signal produced from radiation incident on a scintillating material. Additionally, the small size of the integrated system allows large cost reduction after production scale-up. In Phase I, we demonstrated that a scintillating crystal coupled to an SSPM provides a basis for a low-cost, energy responsive, digital dosimeter that is sensitive to low radiation fields. We also demonstrated that Individual pixels operated at 10-15% above breakdown voltage are insensitive to temperature changes that can disable currently used dosimeters.

* information listed above is at the time of submission.

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