Graduate Thesis Or Dissertation
 

The MiniSpec : a low-cost, compact, FPGA-based gamma spectrometer for mobile applications

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/r781wj727

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  • There is a significant role in emergency response and personal radiation safety that can be played by a compact radiation detector that is capable of identifying radionuclides. Herein is described the design, construction, and characterization of a small, low-cost, low-power gamma ray spectrometer prototype intended to fill this role, conducted in the Advanced Radiation Instrumentation Laboratory at Oregon State University. This spectrometer uses a CsI(Tl) scintillation crystal coupled to a solid-state photomultiplier to detect radiation interactions and an on-board 40 MHz, 12-bit digital pulse-processor based on a field-programmable gate array that generates an energy histogram. The spectrometer is designed be accessed wirelessly to allow a mobile phone to connect to it to display the data. The device requires a single 3.7 V input and consumes only 300 mA when programmed, allowing it to be powered by a mobile phone battery. The full device is estimated to be 5 x 10 x 5 cm and weighs approximately 12 oz. This device is able to achieve 5.66% FWHM energy resolution at 662 keV.
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