Experimental studies of micromegas detectors with different micro-meshes

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YANG He-Run, HU Bi-Tao, ZHANG Xiao-Dong and ZOU Chun-Yan. Experimental studies of micromegas detectors with different micro-meshes[J]. Chinese Physics C, 2011, 35(2): 174-178. doi: 10.1088/1674-1137/35/2/013
YANG He-Run, HU Bi-Tao, ZHANG Xiao-Dong and ZOU Chun-Yan. Experimental studies of micromegas detectors with different micro-meshes[J]. Chinese Physics C, 2011, 35(2): 174-178.  doi: 10.1088/1674-1137/35/2/013 shu
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Received: 2010-05-24
Revised: 2010-06-02
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Experimental studies of micromegas detectors with different micro-meshes

Abstract: The structure of micromegas (micro-mesh gaseous structure) detectors with different micro-meshes of stainless steel wire woven netting and Ni foil has been presented. The counting rates, energy resolution, gain, discharge probability and time resolution have been measured. Wider counter plateaus and gain for the developed detector were obtained. Excellent energy resolution of the micromegas detector, 17% (FWHM) based on Ni foil micro-mesh and 25% (FWHM) based on stainless steel wire woven netting micro-mesh, has been obtained for the 5.9 keV photon peak of the 55Fe X-ray source in an Ar/CO2(10%) gas mixture. The best time resolution at -620 V micro-mesh voltage and -870 V drift voltage is 14.8 ns for cosmic rays in an Ar/CO2(10%) gas mixture. These results satisfy the basic demand of the micromegas detector preliminary design.

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