Experimental studies of micromegas detectors with different micro-meshes

YANG He-Run; HU Bi-Tao; ZHANG Xiao-Dong; ZOU Chun-Yan

doi:10.1088/1674-1137/35/2/013

Chinese Physics C> 2011, Vol. 35> Issue(2) : 174-178 DOI: 10.1088/1674-1137/35/2/013

Experimental studies of micromegas detectors with different micro-meshes

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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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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

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Received: 2010-05-24
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Experimental studies of micromegas detectors with different micro-meshes

Received Date: 2010-05-24

Accepted Date: 2010-06-02

Available Online: 2011-02-05

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.

Experimental studies of micromegas detectors with different micro-meshes

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