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Proceedings Paper

Conceptual design of the SMART dosimeter
Author(s): Erik B. Johnson; Sam Vogel; Rebecca Frank; Graham Stoddard; Alonzo Vera; David Alexander; James Christian
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Paper Abstract

Active dosimeters for astronauts and space weather monitors are critical tools for mitigating radiation induced health issues or system failure on capital equipment. Commercial spaceflight, deep space flight, and satellites require smarter, smaller, and lower power dosimeters. There are a number of instruments with flight heritage, yet as identified in NASA’s roadmaps, these technologies do not lend themselves to a viable solution for active dosimetry for an astronaut, particularly for deep space missions. For future missions, nano- and micro-satellites will require compact instruments that will accurately assess the radiation hazard without consuming major resources on the spacecraft. RMD has developed the methods for growing an advanced scintillation material called phenylcarbazole, which provides pulse shape discrimination between protons and electrons. When used in combination with an anti-coincidence detector system, an assessment of the dose from charged ions and neutral particles can be determined. This is valuable as damage on a system (such as silicon or tissue) is dependent on the particle species. Using this crystal with readout electronics developed in partnership with COSMIAC at the University of New Mexico, the design of the Small Mixed field Autonomous Radiation Tracker (SMART) Dosimeter consists of a low-power analog to digital conversion scheme with low-power digital signal processing algorithms, which are to be implemented within a compact system on a chip, such as the Xilinx Zynq series. A review of the conceptual design is presented.

Paper Details

Date Published: 29 August 2017
PDF: 9 pages
Proc. SPIE 10397, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XX, 103970T (29 August 2017); doi: 10.1117/12.2276283
Show Author Affiliations
Erik B. Johnson, Radiation Monitoring Devices (United States)
Sam Vogel, Radiation Monitoring Devices (United States)
Rebecca Frank, Radiation Monitoring Devices (United States)
Graham Stoddard, Radiation Monitoring Devices (United States)
Alonzo Vera, COSMIAC (United States)
David Alexander, COSMIAC (United States)
James Christian, COSMIAC (United States)

Published in SPIE Proceedings Vol. 10397:
UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XX
Oswald H. Siegmund, Editor(s)

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