Gaseous Dark Matter Detectors

Report of the Topical Group on Micro-Pattern Gaseous Detectors for Snowmass 2021

This report summarizes white papers on micro-pattern gaseous detectors (MPGDs) that were submitted to the Instrumentation Frontier Topical Group IF05, as part of the Snowmass 2021 decadal survey of particle physics.

HARPO - A Gaseous TPC for High Angular Resolution Gamma-Ray Astronomy and Polarimetry from the MeV to the TeV

We propose a "thin" detector as a high-angular-precision telescope and polarimeter for cosmic gamma-rays above the pair-creation threshold. We have built a demonstrator based on a gaseous TPC. We are presently characterizing the detector with charged cosmic rays in the laboratory. Here we present some of its properties.

定向暗物质直接探测的挑战

Challenges for the directional dark matter direct detection

本文围绕定向暗物质直接探测，介绍气体TPCs这一主流成熟探测装置，综述其发展历程、现存挑战与未来前景，为定向暗物质探测研究提供参考。

暗物质探测双相探测器气态氩中产生Ar$_2^{*-}$亚稳态负分子离子的可能证据

Possible evidence for the production of Ar$_2^{*-}$ metastable negative molecular ions in gaseous argon of two-phase detectors for dark matter searches

本研究针对暗物质探测双相氩探测器电致发光信号中的异常延迟脉冲，通过实验测量慢组分占比的压强依赖关系，推断出两种亚稳态负分子离子的存在，为相关探测研究提供新依据。

Fieldable Muon Momentum Measurement using Coupled Pressurized Gaseous Cherenkov Detectors

Cosmic ray muons present a large part of the radiation background and depending on the application of interest muons can be seen as background noise, e.g., radiation mapping, radiation protection, dosimetry, or as a useful interrogation probe such as cosmic ray muon tomography. It is worth noting recent developments on muon scattering tomography which has emerged as a prospective noninvasive monitoring method for many applications including spent nuclear fuel cask monitoring and geotomography. However, it is still very challenging to measure muon momentum in the field, despite the apparent ben…

利用厚气体电子倍增器揭示暗物质搜寻用两相氩探测器气相中慢成分之谜

Unraveling the puzzle of slow components in gaseous argon of two-phase detectors for dark matter searches using Thick Gas Electron Multiplier

本文利用与两相氩探测器电致发光间隙耦合的THGEM，证实S2信号中约4-5 μs和50 μs的慢成分来源于电子被亚稳态负氩离子暂时俘获，为理解低质量WIMP搜寻本底提供依据。