NASA SBIR 2010 Solicitation

FORM B - PROPOSAL SUMMARY


PROPOSAL NUMBER: 10-1 S1.05-8049
SUBTOPIC TITLE: Detector Technologies for UV, X-Ray, Gamma-Ray and Cosmic-Ray Instruments
PROPOSAL TITLE: Improved Stability of Mercuric Iodide Detectors for Anticoincidence Shields

SMALL BUSINESS CONCERN (Firm Name, Mail Address, City/State/Zip, Phone)
DxRay, Inc.
19355 Business Center Drive, Suite 10
Northridge, CA 91324 - 3577
(818) 280-0177

PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name, E-mail, Mail Address, City/State/Zip, Phone)
Neal E Hartsough
neal.hartsough@dxray.com
19355 Business Center Drive, Suite 10
Northridge, CA 91324 - 3577
(818) 280-0177 Extension :109

Estimated Technology Readiness Level (TRL) at beginning and end of contract:
Begin: 3
End: 4

TECHNICAL ABSTRACT (Limit 2000 characters, approximately 200 words)
We propose to utilize guard ring electrode structures and a new film growth technique to create improved polycrystalline mercuric iodide detectors for background suppression by active anticoincidence shielding in gamma-ray spectrometers. Two proposed NASA missions will require anticoincidence shielding for x-ray and gamma-ray spectrometers: the High Energy Telescope of the EXIST (Energetic X-ray Imaging Survey Telescope) mission, and the Space Science Vision Mission expected to visit Titan, one of Saturn's moons. Shielding improves the performance of x-ray and gamma-ray spectrometers by reducing the effect of charged particle interactions which cannot be distinguished from true x-ray and gamma-ray interactions by the spectrometer. Active shields produce a blanking signal when a charged particle is detected, so that the signal from the spectrometer can be ignored during the spectrometer's charged-particle interaction. While it is well know that this technique produces significant improvement in x-ray and gamma-ray spectrometer performance, the technology to implement it is lacking. The attributes of mercuric iodide make it an excellent candidate for anticoincidence shielding detectors. Because of its detection characteristics, light weight, small size, low cost, robustness, and ease of application to non-planar geometries, this material can replace the costly, heavy, and bulky scintillator/photomultiplier tube (PMT) systems currently in use.

POTENTIAL NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
Space-based gamma-ray spectrometers will benefit from the proposed improved polycrystalline mercuric iodide active anticoincidence shield. Gamma-ray spectroscopy is a widely used tool in planetary science and astrophysics, providing valuable information on such diverse topics as planetary composition and the nature of gamma-ray bursts. Both the proposed High Energy Telescope of the EXIST (Energetic X-ray Imaging Survey Telescope) mission and the instruments of the Space Science Vision Mission expected to visit Titan will require anticoincidence shielding for their x-ray and gamma-ray spectrometers.

POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
Because of the small volume and flexible shape of the proposed mercuric iodide detectors, they have a potential application as coincidence or anticoincidence detectors for charged particles in complex high-energy physics detectors, where detector volume near the emission point is often extremely limited.

TECHNOLOGY TAXONOMY MAPPING (NASA's technology taxonomy has been developed by the SBIR-STTR program to disseminate awareness of proposed and awarded R/R&D in the agency. It is a listing of over 100 technologies, sorted into broad categories, of interest to NASA.)
X-rays/Gamma Rays


Form Generated on 09-03-10 12:12