8英寸MCP型光电倍增管的实验研究  

Demarcation of 8-Inch Micro-Channel Plate Photo-Multiplier Tube

作　　者：陈亚玲[1,2] 田进寿[1] 辛丽伟 刘虎林[1] 韦永林[1] 王兴[1] 陈琳[1,2] 陈萍[1,2] 

机构地区：[1]中国科学院西安光学精密机械研究所,瞬态光学与光子技术国家重点实验室,西安710119 [2]中国科学院大学,北京100049

出　　处：《真空科学与技术学报》2015年第10期1163-1168,共6页Chinese Journal of Vacuum Science and Technology

摘　　要：研制了一套单光电子谱测试仪。对8英寸微通道板型光电倍增管(MCP-PMT)的性能指标进行了标定,包括单光电子谱的增益和峰谷比、光电阴极的均匀性。单光电子谱测试仪采用高精度QDC采集电荷谱。VME数据获取系统积分电荷谱得到单光电子谱。采用LABVIEW的电流采样系统获得光电阴极某确定位置上光电流的I-V坪曲线。单光电子谱测试仪测得MCP-PMT在高压为2100 V、脉冲发生器的设置为脉冲宽度10 ns、采样频率1 k Hz、驱动电压1.735 V驱动LED光源时,单光电子谱的增益为2.5233×107、峰谷比值为2.78,光电阴极的非均匀性小于10%。实验测得的性能指标均满足中微子探测等实验要求。同时为20英寸MCP-PMT的成功研制奠定了理论设计及测试基础。A dedicated single photoelectron spectrometer was developed to evaluate and demarcate the characteristics of the 8-inch micro-channel plate photo-multiplier tube（ MCP-PMT）,including but not limited to the gain and peak-to-valley voltage ratio（ P / V） of a single photoelectron spectrum and uniformity of the photocathode. The analogue signal of charges was digitized with high precision charge-to-digital converter（ QDC）; the single photoelectron spectrum was obtained by integrating the digitized charge spectrum with VME data-acquisition software; and the photoelectron I-V flat curve at a specific point of the photocathode were evaluated with the current-sampling module of software LABVIEW. The results show that the gain and P / V ratio of the 8-inch MCP-PMT single photoelectron spectrum were 2. 5233 × 107 and above 2. 78,respectively,under the operation conditions： a voltage of 2000 V,a pulse-width of 10 ns,a sampling-frequency of 1 k Hz,and with LED light-source powered at 1. 735 V. Moreover,the photocathode uniformity was estimated to be lower than 10%,satisfying the requirement for neutrino detection.

关 键 词：单光电子谱仪 微通道板型光电倍增管 QDC 单光电子谱 均匀性 

分 类 号：TN152[电子电信—物理电子学]