Tissue-Equivalent Radiation Dosimeter-On-A-Chip

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNJ08JA55C
Agency Tracking Number: 066214
Amount: $599,951.00
Phase: Phase II
Program: SBIR
Awards Year: 2008
Solicitation Year: 2006
Solicitation Topic Code: X13.01
Solicitation Number: N/A
Small Business Information
44 Hunt Street, 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
 Nancy Marshall
Title: Business Official
Phone: (617) 668-6801
Email: NMarshall@RMDInc.com
Research Institution
Available digital dosimeters are bulky and unable to provide real-time monitoring of dose for space radiation. The complexity of space-flight design requires reliable, fault-tolerant equipment capable of providing real-time dose readings during a mission, which is not feasible with the existing thermo-luminescent dosimeter (TLD) technology, especially during extravehicular activities (EVA). Real-time monitoring is important for low-Earth orbiting spacecraft and interplanetary space flight to alert the crew when Solar Particle Events (SPE) increase the particle flux of the spacecraft environment. The Phase-II project will design and fabricate a prototype Dosimeter-on-a-Chip (DoseChip) for personal dosimetry comprised of a tissue-equivalent scintillation crystal coupled to a solid-state photomultiplier (SSPM). The ubiquitous nature of CMOS technology provides a standardized development platform, and the ability to integrate the supporting electronics into a miniature, lightweight design. The DoseChip provides a tissue-equivalent response to the relevant energies and types of radiation for low-Earth orbit and interplanetary space flight to the moon or Mars and will be sensitive to the dose rates and particle fluxes of ambient Galactic Cosmic Rays (GCR) to the higher rates of major SPE. The DoseChip will complement the existing Crew Passive Dosimeters by providing real-time dosimetry and as an alarming monitor for SPE.

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

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