Gas microchannel plate-pixel detector for X-ray polarimetry

被引：3

作者：

Feng, Huan-Bo ^{[1
]}

Liu, Hong-Bang ^{[1
]}

Wang, Dong ^{[2
]}

Li, Zi-Li ^{[3
]}

Liu, Shu-Lin ^{[4
,5
]}

Liu, Qian ^{[6
]}

Li, Hang-Zhou ^{[7
]}

Wang, Bin-Long ^{[6
]}

Xie, Yan-Jun ^{[1
]}

Fan, Zong-Wang ^{[1
]}

Wang, Hui ^{[2
]}

Chen, Ran ^{[2
]}

Yi, Di-Fan ^{[6
]}

Ma, Rui-Ting ^{[6
]}

Xie, Fei ^{[1
]}

Peng, Bo ^{[7
]}

Sun, Xiang-Ming ^{[2
]}

Li, Jin ^{[4
]}

Liang, En-Wei ^{[1
]}

机构：

[1] Guangxi Univ, Sch Phys Sci & Technol, Guangxi Key Lab Relativist Astrophys, Nanning 530004, Peoples R China

[2] Cent China Normal Univ, Key Lab Quark & Lepton Phys MOE, PLAC, Wuhan 430079, Peoples R China

[3] Huzhou Univ, Sch Sci, Huzhou 313000, Peoples R China

[4] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

[5] Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China

[6] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China

[7] China Elect Technol Grp Corp, Res Inst 13, Shijiazhuang 050057, Peoples R China

来源：

NUCLEAR SCIENCE AND TECHNIQUES | 2024年 / 35卷 / 05期

基金：

中国国家自然科学基金;

关键词：

X-ray polarimetry; Gas microchannel plate-pixel detector; Gamma-ray bursts; POLARIZATION;

D O I：

10.1007/s41365-024-01407-3

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

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-board polarimeter that is sensitive to soft X-rays (2-10 keV), called low-energy polarization detector. 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.

引用

页数：14