منابع مشابه
Aging in gaseous photodetectors
This paper describes the present status of aging studies in various photosensitive detectors. New experimental data are presented on aging of trimethylamine (TMA) and ethylferrocene (EF) photosensitive vapors as well as on CsI and SbCs photocathodes. A new explanation of the aging process for CsI photocathodes based on solid –state physics theory is given. Finally, based on our studies, a gener...
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Aging of gaseous detectors is known as the degradation of their performance under the exposure to ionizing radiation. It is a complex phenomenon that depends on many parameters. Among others, aging depends on the gas mixture and may be enhanced by the presence of pollutants in the gas. The origin of the impurities is diverse and includes outgassing from assembly materials and the gas system com...
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The use of nanowires and nanowire structures as photodetectors is an emerging research topic. Despite the large amount of reports on nanowire photoresponse that appeared in the literature over the last decade, the mechanism leading to high photosensitivity and photoconductive gain in high aspect ratio nanostructures has been elucidated only recently. Novel device architectures integrated in sin...
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The inclusion of cameras in everything from cell phones to pens to children’s’ toys is possible because of the low cost and low power consumption of the imaging arrays that form the core of the cameras. However, these arrays are low cost and low power because they are CMOS-based; this allows for the devices to be made with the same processes and facilities that are used to make memory and compu...
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Deep ultraviolet DUV avalanche photodetectors APDs based on an AlN /n-SiC Schottky diode structure have been demonstrated. The device with a mesa diameter of 100 m exhibits a gain of 1200 at a reverse bias voltage of −250 V or a field of about 3 MV /cm. The cut-off and peak responsivity wavelengths of these APDs were 210 and 200 nm, respectively. This is the highest optical gain and shortest cu...
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ژورنال
عنوان ژورنال: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
سال: 2003
ISSN: 0168-9002
DOI: 10.1016/j.nima.2003.09.013