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CMOS-Based Neutron Spectroscopic Dosimeter (CNSD)

Award Information

National Aeronautics and Space Administration
Award ID:
Program Year/Program:
2008 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Radiation Monitoring Devices, Inc.
44 Hunt St. Watertown, MA 02472-4699
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2008
Title: CMOS-Based Neutron Spectroscopic Dosimeter (CNSD)
Agency: NASA
Contract: NNX08CB10P
Award Amount: $99,996.00


Monitoring space radiation and the dose received by astronauts is important, especially for future long-duration missions. Neutrons contribute a significant component to the total radiation dose during solar events. We propose to develop a rugged, compact, lightweight, non-hazardous CMOS-based detector technology for an existing neutron spectroscopic dosimeter system. The existing system utilizes a unique gelled scintillation material, which enables the discrimination of neutron signals from gamma background using time profile of the scintillation signal. We will demonstrate that the ultra-compact CMOS-SSPM integrated with its readout electronics can replace photomultiplier tubes and its discrete readout components used in the existing neutron spectroscopic dosimeter system. When coupled to the existing system, the proposed technology will demonstrate a technology readiness level of 4. This provides the necessary basis for a flight-ready neutron spectrometer system able to efficiently detect neutrons with energies up to 150MeV, and capable of rejecting gamma-ray and charged particle backgrounds using, respectively, the pulse shape discrimination characteristic of the gel scintillation detector and the of anti-coincidence scintillation detectors.

Principal Investigator:

James Christian
Principal Investigator

Business Contact:

Nancy Marshall
Contracts Manager
Small Business Information at Submission:

Radiation Monitoring Devices, Inc.
44 Hunt Street Watertown, MA 02472

EIN/Tax ID: 042546395
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No