کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9845338 | 1526512 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Digital X-ray portable scanner based on monolithic semi-insulating GaAs detectors: General description and first “quantum” images
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
ابزار دقیق
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چکیده انگلیسی
The present work describes a portable digital X-ray scanner based on bulk undoped semi-insulating (SI) GaAs monolithic strip line detectors. The scanner operates in “quantum” imaging mode (“single photon counting”), with potential improvement of the dynamic range in contrast of the observed X-ray images. The “heart” of the scanner (detection unit) is based on SI GaAs strip line detectors. The measured detection efficiency of the SI GaAs detector reached a value of over 60Â % (compared to the theoretical one of â¼75Â %) for the detection of 60Â keV photons at a reverse bias of 200Â V. The read-out electronics consists of 20 modules fabricated using a progressive SMD technology with automatic assembly of electronic devices. Signals from counters included in the digital parts of the modules are collected in a PC via a USB port and evaluated by custom developed software allowing X-ray image reconstruction. The collected data were used for the creation of the first X-ray “quantum” images of various test objects using the imaging software developed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 546, Issues 1â2, 1 July 2005, Pages 118-124
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 546, Issues 1â2, 1 July 2005, Pages 118-124
نویسندگان
F. Dubecký, A. Perd'ochová, P. Å Äepko, B. Zat'ko, V. Sekerka, V. NeÄas, M. SekáÄová, M. Hudec, P. BoháÄek, J. Huran,