Tissue-Equivalent Radiation Dosimeter-On-A-Chip

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$99,999.00
Award Year:
2007
Program:
SBIR
Phase:
Phase I
Contract:
NNJ07JB14C
Award Id:
83847
Agency Tracking Number:
066214
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
44 Hunt Street, Watertown, MA, 02472
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
073804411
Principal Investigator:
James Christian, PhD
Principal Investigator
(617) 668-6800
JChristian@RMDInc.com
Business Contact:
Gerald Entine
President
(617) 668-6800
GEntine@RMDInc.com
Research Institution:
n/a
Abstract
Many commercially available digital dosimeters are bulky and are unable to properly measure dose for space radiation. The complexity of space flight design requires reliable, fault-tolerant equipment with the capability of providing real-time dose readings during a mission, which is not feasible with the existing thermo-luminescent dosimeter (TLD) technology. The project will create a compact, lightweight, energy-efficient dose meter comprised of a tissue-equivalent scintillation crystal coupled to a solid-state photomultiplier (SSPM), which is an array of CMOS photodiodes, operated in Geiger avalanche mode. The ubiquitous nature of CMOS technology provides a standardized development platform, and the ability to integrate all the supporting electronics into a miniature, simple design. In Phase I, we will model the expected dosimeter performance and characterize the performance of a prototype dosimeter exposed to high-energy protons, which simulates radiation in the space environment. We will also determine the TLD-dose equivalence of our measurements. In Phase II, we will create the support software and design and fabricate a finalized chip that includes readout electronics, power supply, memory storage, and other interfacing components.

* information listed above is at the time of submission.

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