Journal of the Korean Society of Radiology (한국방사선학회논문지)

The Korean Society of Radiology (한국방사선학회)
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Designing and Performance Testings of Microdot Detectors

  • Cho, Hyo-Sung (Department of Radiological Science, Yonsei University) ;
  • Lee, Bong-Soo (School of Biomedical Engineering, Konkuk University) ;
  • Kim, Sin (Department of Nuclear and Energy Engineering, Cheju National University)
  • Published : 2007.12.30
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Abstract

We describe recent observations and measurements realized with microdot (MDOT) detectors having 50 mm, 100 mm, and 200 mm pitches for 3.7 keV X-rays. A gas gain of $3.1{\times}10^3$ has been measured with 50 mm 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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