Experimental studies of micromegas detectors with different micro-meshes
Experimental studies of micromegas detectors with different micro-meshes
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DOI：
10.1088/1674-1137/35/2/013
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发表时间：
2011-02
影响因子：
3.6
通讯作者：
Yang He-Run;Hu Bi-tao;Zhang Xiao-dong;Zou Chun-Yan
中科院分区：
文献类型：
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作者：
Yang He-Run;Hu Bi-tao;Zhang Xiao-dong;Zou Chun-Yan
介绍了不锈钢丝编织网和镍箔不同微网孔的微米气体（微网孔气体结构）探测器的结构。测量了计数率、能量分辨率、增益、放电概率和时间分辨率。研制的探测器获得了更宽的计数器平台和增益。在Ar/CO_2（10%）混合气体中，对~（55）Fe X射线源的5.9keV光子峰，采用Ni箔微网和不锈钢丝网微网的探测器分别获得了17%（FWHM）和25%（FWHM）的能量分辨率。在−620 V微网格电压和−870 V漂移电压下，宇宙射线在Ar/CO2（10%）混合气体中的最佳时间分辨率为14.8 ns。这些结果满足了微兆气体探测器初步设计的基本要求。
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.