Tissue-Equivalent Radiation Dosimeter-On-A-Chip

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNJ07JB14C
Agency Tracking Number: 066214
Amount: $99,999.00
Phase: Phase I
Program: SBIR
Awards Year: 2007
Solicitation Year: 2006
Solicitation Topic Code: X13.01
Solicitation Number: N/A
Small Business Information
44 Hunt St, Watertown, MA, 02472-4699
DUNS: 073804411
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 James Christian
 Principal Investigator
 (617) 668-6800
Business Contact
 Gerald Entine
Title: President
Phone: (617) 668-6800
Email: GEntine@RMDInc.com
Research Institution
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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