中文摘要：

介绍了一种利用鱼线做放大区间隔的MICROMEGAS探测器,灵敏面积为50 mm×50mm。在Ar＋CO2（10%）气体条件下,利用55Fe源5.9 keV的X射线对MICROMEGAS探测器进行了初步测试：计数率大于10^3Hz的条件下,计数率坪长达到280 V;当栅极电压在800 V时能量分辨为30%;当增益高于10^4时打火率低于10^-4;PCB板读出条周期为400μm条件下的位置分辨好于120μm。结果表明,研制的MICROMEGAS探测器达到了初步设计的基本要求。

英文摘要：

In this paper,A MICROMEGAS（Micro-Mesh-Gaseous Structure） detector with the amplification gap defined by stretching nylon fishing lines has been described.And its count plateau,gas gain and energy resolution in the condition of a ^55Fe X-ray source and Ar-CO2（10%） mixture gases are measured as functions of mesh voltage.The count plateau approaches 280 V at the count rate of 10^3 Hz.The discharge rate is less than 10^-4 when the gas gain is up to 10^4.The energy resolution is 30%（FWHM） based on-800 V mesh voltage.The position resolution is less than 120 μm at the condition of the sensitive area（50 mm×50 mm） Printed Circuit Boards（PCB） and its strip pitch of 400 μm.The results can satisfy the basic demand of MICROMEGAS detector preliminary design.