分类： 核科学技术 >> 核科学与技术 提交时间： 2024-01-06
Huan-Bo Feng
Hong-Bang Liu
Dong Wang
Zi-Li Li
Shu-Lin Liu
Qian Liu
Hang-Zhou Li
Bin-Long Wang
Yan-Jun Xie
Zong-Wang Fan
Hui Wang
Ran Chen
Di-Fan Yi,
Rui-Ting Ma
Fei Xie
Bo Peng
Xiang-Ming Sun
Jin Li
En-Wei Liang
摘要： POLAR-2 is a gamma-ray burst (GRB) polarimeter that is designed to study the polarization in GRB radiation emissions, aiming to improve our knowledge of related mechanisms. POLAR-2 is expected to utilize an on#2;board polarimeter that is sensitive to soft X-rays (210 keV), called low-energy polarization detector (LPD). We have developed a new soft X-ray polarization detector prototype based on gas microchannel plates (GMCPs) and pixel chips (Topmetal). The GMCPs have bulk resistance, which prevents charging-up effects and ensures gain stability during operation. The detector is composed of low-outgassing materials and is gas-sealed using a laser welding technique, ensuring long-term stability. A modulation factor of 41.28% 0.64% is obtained for a 4.5 keV polarized X-ray beam. A residual modulation of 1.96% 0.58% at 5.9 keV is observed for the entire sensitive area.
分类： 物理学 >> 核物理学 提交时间： 2016-08-31
Feng-Jiao Luo
Yue-Kun Heng
Zhi-Min Wang
Pei-Liang Wang
Zhong-Hua Qin
2 Mei-Hang Xu
Dong-Hao Liao
Hai-Qiong Zhang
Yong-Bo Huang
Xiang-Cui Lei
Sen Qian
Shu-Lin Liu
Yuan-Bo Chen
Yi-Fang Wang
摘要： The quality of PMT signal is one of the key items for a large and high precision neutrino experiment, like Daya Bay, JUNO, while most of the experiments are affected by the PMT signal overshoot from its positive HV-single cable scheme. For JUNO prototype detector, we have a detailed study on the PMT overshoot and successfully reduced the ratio of overshoot amplitude to signal to ~1% from previous typical ~10%, with no affection to PMT other parameters. Furthermore, we calculated that the overshoot is a result of discharging of capacitors in the HV-signal splitter and the PMT voltage divider. The study result is extremely important for JUNO and other similar experiments.
点击量
通过
点击量
下载量
评论
待评议
