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Volume 26 - ICOP & ICPET 2020
ICOP & ICPET _ INPC _ ICOFS 2020, 26 - ICOP & ICPET 2020: 465-468 |
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Faezmehr A, Khorsandi M, Jafari H, Feghhi S A. Optical characteristic measurement and comparison of three PIN photodiodes for using in x-ray tomography imaging system. ICOP & ICPET _ INPC _ ICOFS 2020; 26 :465-468
URL: http://opsi.ir/article-1-2094-en.html
URL: http://opsi.ir/article-1-2094-en.html
1- Shahid Beheshti University, Nuclear Engineering Faculty, Radiation Application Group
Abstract: (1669 Views)
In recent decades, solid state detectors had a great role in imaging systems specially in x-ray computed tomography systems as in many of them, coupled photodiodes with scintillator are used. In this project, three commercial PIN photodiodes (BPW34B, BS500B and SGPD30C) have been tested for making CT-scan x-ray detector array. In this way critical optical parameters of photodiodes have been measured and subsequently by considering effective factors such as price, active and death area of photodiodes in arrayed shape, results have been reported. Parameters which have been measured are: dark current in zero biased and reverse biased state for four different voltages, photodiode response to light emission diodes (LEDs) with three different wave lengths which are matched with CsI(Tl) scintillator. Results showed that using BPW34B for this work is much more accessible, comfortable and with appropriate results.
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