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Task Book: Biological & Physical Sciences Division and Human Research Program
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Project Title:  Fast Neutron Dosimeter for the Space Environment Reduce
Fiscal Year: FY 2011 
Division: Human Research 
Research Discipline/Element:
HRP SR:Space Radiation
Start Date: 06/01/2011  
End Date: 05/30/2013  
Task Last Updated: 09/06/2011 
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Principal Investigator/Affiliation:   Christian, James  Ph.D. / Radiation Monitoring Devices, Inc. 
Address:  44 Hunt Street 
 
Watertown , MA 02472-4699 
Email: JChristian@rmdinc.com 
Phone: (616) 668-6897  
Congressional District:
Web:  
Organization Type: INDUSTRY 
Organization Name: Radiation Monitoring Devices, Inc. 
Joint Agency:  
Comments:  
Project Information: Grant/Contract No. NNX11CA24C 
Responsible Center: NASA JSC 
Grant Monitor: Cucinott1a, Francis  
Center Contact: 281-483-0968 
noaccess@nasa.gov 
Solicitation / Funding Source: SBIR Phase II 
Grant/Contract No.: NNX11CA24C 
Project Type: GROUND 
Flight Program:  
TechPort: No 
No. of Post Docs:  
No. of PhD Candidates:  
No. of Master's Candidates:  
No. of Bachelor's Candidates:  
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Human Research Program Elements: (1) SR:Space Radiation
Human Research Program Risks: (1) Cancer:Risk of Radiation Carcinogenesis
Human Research Program Gaps: (1) Cancer11:What are the most effective shielding approaches to mitigate cancer risks?
Task Description: Model calculations and risk assessment estimates indicate that secondary neutrons, with energies ranging between 0.5 to >150 MeV, make a significant contribution to the total absorbed dose received by space crews during long duration space missions [1-3]. Advanced scintillation materials, which exhibit radiation type and mass dependent emission times, coupled to SSPM detectors, provide the optimum volume to payload performance and the ability to easily discriminate between the fraction of dose, which results from secondary neutrons, and that which results from exposure to energetic charged particles and background gamma-rays.

The Phase-1 effort successfully characterized the critical components of the proposed dosimeter, specifically, the response of the scintillation material to irradiation by gamma-rays, protons, and neutrons, as well as the performance of the SSPM detector. The Phase-1 modeling studies provide a critical foundation for assessing the anticipated signals in the space radiation environment. The proposed dosimeter would overcome many of the limitations in the current generation of neutron dosimeters, and would provide baseline information on the physics, needed with the information from biological studies, to assess risk in future human-space-exploration missions to the moon and Mars.

The primary target market for the fast-neutron dosimeter is NASA missions. Key missions are NASA missions that involve extended space-time, such as possible Moon and Mars missions.

Research Impact/Earth Benefits: . Governmental and private sector space agencies across the globe will have similar needs for dosimeter devices.

. International airlines, especially those investigating space tourism, such as Space X.

. The commercial satellite market is a large and growing market that will be interested in monitoring space radiation.

. Earth bound or terrestrial markets, including hospitals, national laboratories and industrial research, is the largest potential segment. This market does require some changes in the product design.

Task Progress & Bibliography Information FY2011 
Task Progress: New project for FY2011. Reporting not required for this SBIR Phase 2 project.

Bibliography Type: Description: (Last Updated: )  Show Cumulative Bibliography Listing
 
 None in FY 2011