Investigation of GEM-Micromegas detector on X-ray beam of synchrotron radiation

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ZHANG Yu-Lian, QI Hui-Rong, HU Bi-Tao, FAN Sheng-Nan, WANG Bo, LIU Mei, ZHANG Jian, LIU Rong-Guang, CHANG Guang-Cai, LIU Peng, OUYANG Qun, CHEN Yuan-Bo and YI Fu-Ting. Investigation of GEM-Micromegas detector on X-ray beam of synchrotron radiation[J]. Chinese Physics C, 2014, 38(4): 046001. doi: 10.1088/1674-1137/38/4/046001
ZHANG Yu-Lian, QI Hui-Rong, HU Bi-Tao, FAN Sheng-Nan, WANG Bo, LIU Mei, ZHANG Jian, LIU Rong-Guang, CHANG Guang-Cai, LIU Peng, OUYANG Qun, CHEN Yuan-Bo and YI Fu-Ting. Investigation of GEM-Micromegas detector on X-ray beam of synchrotron radiation[J]. Chinese Physics C, 2014, 38(4): 046001.  doi: 10.1088/1674-1137/38/4/046001 shu
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Received: 2013-05-14
Revised: 2013-06-19
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Investigation of GEM-Micromegas detector on X-ray beam of synchrotron radiation

    Corresponding author: QI Hui-Rong,

Abstract: To reduce the discharge of the standard bulk Micromegas and GEM detectors, a GEM-Micromegas detector was developed at the Institute of High Energy Physics. Taking into account the advantages of the two detectors, one GEM foil was set as a preamplifier on the mesh of Micromegas in the structure and the GEM preamplification decreased the working voltage of Micromegas to significantly reduce the effect of the discharge. At the same gain, the spark probability of the GEM-Micromegas detector can be reduced to a factor 0.01 compared to the standard Micromegas detector, and an even higher gain could be obtained. This paper describes the performance of the X-ray beam detector that was studied at 1W2B Laboratory of Beijing Synchrotron Radiation Facility. Finally, the result of the energy resolution under various X-ray energies was given in different working gases. This indicates that the GEM-Micromegas detector has an energy response capability in an energy range from 6 keV to 20 keV and it could work better than the standard bulk-Micromegas.

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