1. IE browser is NOT supported anymore. Please use Chrome, Firefox or Edge instead.
2. If you are a new user, please register to get an Indico account through https://login.ihep.ac.cn/registIndico.jsp. Any questions, please email us at helpdesk@ihep.ac.cn or call 88236855.
3. If you need to create a conference in the "Conferences, Workshops and Events" zone, please email us at helpdesk@ihep.ac.cn.
4. The max file size allowed for upload is 50 Mb.

基于3He管中子位置灵敏探测器的真空下低功耗读出电子学设计

Aug 11, 2022, 2:44 PM
2m

Speaker

Mr Qicai Li (University of Chinese Academy of Sciences, Beijing 100049, China; Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China)

Description

中国散裂中子源(CSNS)规划的大部分中子谱仪都是基于3He管位置灵敏探测器。为了减少空气对中子散射实验的影响,探测器需要放置在真空腔中,同时为了减少穿越真空腔的电缆数量以及提高电信号的信噪比,电子学读出系统也需要紧靠探测器放置于真空腔中。由于3He管探测器的命中位置是通过电荷分配法计算得到的,准确的脉冲峰值获取需要ADC工作在高速采集状态下,目前基于这种方法的读出电子学系统功耗都较高,不适合应用在没有空气对流,电子学散热困难的真空中。因此,为实现电子学在高速高精度采样的同时还能以极低功耗运行的目标,我们从以下几个方面进行了研究:(1)用低功耗 ASIC 芯片代替分立器件模拟前端电路; (2) 使用先进低功耗ADC芯片和FPGA; (3) 通过时钟门控系统以降低数字动态功耗; (4)采用高效散热介质,有效地将热量传导至3He管探测器的金属机械结构。基于上述部分方法开发了第一代原型机,测试功耗为4.4W。而目前基于上述所有方法的 8 管探测器模块读数电子学原型已经开发完成,正在进行测试,最新一代电子学的整体功耗预计在3W左右,满足真空下应用的目标。

Primary authors

Dr Hong Luo (Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China) Dr Hongbin Liu (Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China) Dr Jiayi Ren (Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China) Mr Qicai Li (University of Chinese Academy of Sciences, Beijing 100049, China; Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China) Prof. Yubin Zhao (Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China) Dr Zhijia Sun (IHEP)

Presentation materials