Application of Time Projection Chambers with GEMs and Pixels to WIMP Searches and Fast Neutron Detection

TL;DR

This paper explores advanced gas-filled Time Projection Chambers with GEMs and pixel electronics for detecting neutral particles, aiming to improve WIMP dark matter searches and fast neutron detection through enhanced resolution and efficiency.

Contribution

It introduces a novel detector design combining GEMs and pixel electronics for improved neutral particle detection and discusses its potential for directional dark matter and neutron searches.

Findings

Successful review of previous experimental results.

Development of a prototype TPC with GEMs and pixels.

Promising prospects for directional WIMP and neutron detection.

Abstract

We present work on the detection of neutral particles via nuclear recoils in gas-filled Time Projection Chambers (TPCs). We employ Gas Electron Multipliers (GEMs) to amplify the signal and silicon pixel electronics to detect the avalanche charge. These technologies allow ionization in the target gas to be detected with low noise, improved position and time resolution, and high efficiency. We review experimental results obtained in previous years, and report on ongoing simulation studies and construction of the first prototype at the University of Hawaii. We also present prospects of using such detectors to perform direction-sensitive searches for WIMP dark matter and fast neutron from fissionable material.