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SINGLE SPHERE MULTIPLE DETECTOR NEUTRON SPECTRONMETER

Award Information

Agency:
National Science Foundation
Branch:
N/A
Award ID:
7627
Program Year/Program:
1987 / SBIR
Agency Tracking Number:
7627
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Radiation Monitoring Devices, Inc.
44 Hunt Street Watertown, MA 02472-4699
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1987
Title: SINGLE SPHERE MULTIPLE DETECTOR NEUTRON SPECTRONMETER
Agency: NSF
Contract: N/A
Award Amount: $40,000.00
 

Abstract:

ACCURATE MEASUREMENT OF NEUTRONS IS DIFFICULT AND REQUIRES COMPLEX, EXPENSIVE EQUIPMENT. IT IS AN ESPECIALLY SERIOUS PROBLEM FOR DOSIMETRY WHERE SEVERAL TECHMICAL ISSUES MAKE THE ACCURATE DTERMINATION OF RADIATION DOSE EXTREMELY DIF- FICULT. FOR EXAMPLE, NEUTRONS OCCUR OVER A WIDE RANGE OF ENERGIES AND HAVE DIFFERENT PHYSICAL PROPERTIES AS A FUNC- TION OF ENERGY. THE MOST COMMON APPROACH TO MAKING FIELD MEASUREMENTS OF NEUTRON SPECTRA AND DOSE IS TO USE A BONNER SPHERE INSTRUMENT. THIS IS A SINGLE NEUTRON DETECTOR PLUS A SET OF MODERATING SPHERES OF DIAMETERS RANGING FROM 3 TO 12 INCHES. BY COMBINING THE DETECTOR COUNT RATE WHEN IT IS INSERTED INTO EACH SPHERE, AN UNFOLDING OF THE NEUTRON PROBLEM. INSTEAD OF USING A SINGLE DETECTOR WITH SEVERAL BONNER MODERATORS, A LARGE NUMBER OF SMALL, INEXPENSIVE AC- TIVE DETECTORS EMBEDDED IN A SINGLE MODERATOR WILL BE USED THE ADVANTAGE OF AN ACTIVE DEVICE ARE SIGNIFICANT: THE RADIATION MEASUREMENTS WILL BE IMMEDIATELY AVAILABLE FOR ANALYSISAND REPEATED EXPERIMENTS IN DIFFERENT POSITIONS WILL BE RELATIVELY EASY. THUS THE PROPOSED INSTRUMENT WILL BE A VALU- ABLE NEW TOOL FOR BOTH PHYSICS RESEARCH AND HEALTH PHYSICS. SPECTRUM GICES AN ESTIMATE OF THE QUALITY FACTOR FOR THE FIELD. THIS PROCESS IS TIME CONSUMIN AND HAS SOME FUNDAMEN TAL INTERPRETATION PROBLEMS. THE PROPOSED NEW INSTRUMENT WILL USE A NOVEL APPROACH TO ADDRESS THIS PROBLEM. INSTEAD OF USING A SINGLE DETECTOR WITH SEVERAL BONNER MODERATORS, A LARGE NUMBER OF SMALL, INEXPENSIVE ACTIVE DETECTORS EMBED-DED IN A SINGLE MODERATOR WILL BE USED. THE ADVANTAGES OF AN ACTIVE ARE SIGNIFICANT: THE RADIATION MEASUREMENTS WILL BE IMMEDIATELY AVAILABLE FOR ANALYSIS AND REPEATED EXPERI- MENTS IN DIFFERENT POSITIONS WILL BE RELATIVELY EASY. THUS, THE PROPOSED INSTRUMENT WILL BE A VALUABLE NEW TOOL FOR BOTH PHYSICS RESEARCH AND HEALTH PHYSICS.

Principal Investigator:

Gerald entine
6179261167

Business Contact:

Small Business Information at Submission:

Radiation Monitoring Devices
44 Hunt St. Watertown, MA 02172

EIN/Tax ID:
DUNS: N/A
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No