Status and Prospects of the DMTPC Directional Dark Matter Experiment

Measurement of the directional sensitivity of DMTPC detectors

The Dark Matter Time Projection Chamber (DMTPC) is a direction-sensitive detector designed to measure the direction of recoiling $^{19}$F and $^{12}$C nuclei in low-pressure CF$_4$ gas using optical and charge readout systems. In this paper, we employ measurements from two DMTPC detectors, with operating pressures of 30-60 torr, to develop and validate a model of the directional response and performance of such detectors as a function of recoil energy. Using our model as a benchmark, we formulate the necessary specifications for a scalable directional detector with sensitivity comparable to th…

Observation of the 'head-tail' effect in nuclear recoils of low-energy neutrons

Directional detection of dark matter can provide unambiguous observation of dark matter interactions even in the presence of background. This article presents an experimental method to measure the direction tag ("head-tail") of the dark matter wind by detecting the scintillation light created by the elastic nuclear recoils in the scattering of dark matter particles with the detector material. The technique is demonstrated by tagging the direction of the nuclear recoils created in the scattering of low-energy neutrons with CF4 in a low-pressure time-projection chamber that is developed by the D…

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。

Dark Matter Directionality Revisited with a High Pressure Xenon Gas Detector

An observation of the anisotropy of dark matter interactions in a direction-sensitive detector would provide decisive evidence for the discovery of galactic dark matter. Directional information would also provide a crucial input to understanding its distribution in the local Universe. Most of the existing directional dark matter detectors utilize particle tracking methods in a low-pressure gas time projection chamber. These low pressure detectors require excessively large volumes in order to be competitive in the search for physics beyond the current limit. In order to avoid these volume limit…

Readout technologies for directional WIMP Dark Matter detection

The measurement of the direction of WIMP-induced nuclear recoils is a compelling but technologically challenging strategy to provide an unambiguous signature of the detection of Galactic dark matter. Most directional detectors aim to reconstruct the dark-matter-induced nuclear recoil tracks, either in gas or solid targets. The main challenge with directional detection is the need for high spatial resolution over large volumes, which puts strong requirements on the readout technologies. In this paper we review the various detector readout technologies used by directional detectors. In particula…

将Micromegas探测器用于暗物质直接探测：挑战与展望

Using Micromegas detectors for direct dark matter searches: challenges and perspectives

本文介绍了搭载Micromegas像素化读出的气体TPC在暗物质直接探测中的应用现状，梳理了相关技术挑战，汇报了IAXO、TREX-DM实验的研发进展，指出该技术具备良好应用前景。