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KMID : 1151820070010030017
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Journal of the Korean Society of Radiology
2007 Volume.1 No. 3 p.17 ~ p.21
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Designing and Performance Testings of Microdot Detectors
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Cho Hyo-Sung
Lee Bong-Soo
Kim Sin
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Abstract
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We describe recent observations and measurements realized with microdot (MDOT) detectors having 50 ㎜, 100 ㎜, and 200 ㎜ pitches for 3.7 keV X-rays. A gas gain of 3.1×10³ has been measured with 50 ㎜ pitch MDOT at potential difference much lower than those usually obtained with MSGCs. The defocusing effect caused by the existence of the readout lines passing below the insulator layer has been investigated from the drift voltage dependence of the count rate variation and the electric field simulation for all the detectors. Results concerning the spatial resolutions are presented with collimated X-ray beams.
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