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Proceedings Paper

Design and optimization of a radiation detector for ground and spaced-based exposure
Author(s): Dileon Saint-Jean; Kazim Abbot; Darnel Williams; Dilip Jana; Lee Sawyer; Pedro Derosa
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Paper Abstract

In response to the critical need of more effective bio-dosimetric techniques to improve cancer risk estimation, this paper focuses on the design of an advanced biomedical instrumentation that could be used for radiation risk analysis on space missions. A designed concept for a hodoscope for radiation detection and tracking is tested via Monte Carlo simulation. The device consists of a set of layers of scintillating fibers, above and below a biological sample, in a design that allows for the determination of the direction of incoming and outgoing radiation. The efficiency of energy deposition on each of the different layers of the device is studied for proton radiation. The study of the response for different incoming energy is the main focus, but fiber-size is also a designed parameter considered in this study. The optimum energy range as found to be around 30 MeV’s – 50MeV’s depending on arrangement. It is found that energy deposited by protons in the optimum range in 1 mm-diameter fibers, is large enough for detection. Since smaller fibers allow for larger resolution, it is concluded that they are preferable than 2 mm fibers. Alternative arrangements consisting respectively of 3 and 4 layers of fibers on each side of the sample are tested and compared. It is observed that although one more coordinate for the source is needed, the 3-layers array is a viable alternative when that extra information is available. With this arrangement, the device is sensitive to lower energy photons.

Paper Details

Date Published: 27 August 2015
PDF: 6 pages
Proc. SPIE 9595, Radiation Detectors: Systems and Applications XVI, 959508 (27 August 2015); doi: 10.1117/12.2191864
Show Author Affiliations
Dileon Saint-Jean, Louisiana Tech Univ. (United States)
Kazim Abbot, Grambling State Univ. (United States)
Darnel Williams, Grambling State Univ. (United States)
Dilip Jana, Louisiana Tech Univ. (United States)
Lee Sawyer, Louisiana Tech Univ. (United States)
Pedro Derosa, Louisiana Tech Univ. (United States)
Grambling State Univ. (United States)


Published in SPIE Proceedings Vol. 9595:
Radiation Detectors: Systems and Applications XVI
Gary P. Grim; H. Bradford Barber, Editor(s)

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