A 20-Liter Test Stand with Gas Purification for Liquid Argon Research

TL;DR

This paper presents a cost-effective 20-liter test stand designed for studying liquid argon properties, including electron transport, using a purification system and a specialized electron source.

Contribution

It introduces a novel, simple gas purification method and a compact test stand for detailed liquid argon research, enabling precise electron transport measurements.

Findings

High purity achieved with simple gas purification

Successful measurement of electron drift and diffusion

Operational performance demonstrates system effectiveness

Abstract

We describe the design of a 20-liter test stand constructed to study fundamental properties of liquid argon (LAr). This system utilizes a simple, cost-effective gas argon (GAr) purification to achieve high purity, which is necessary to study electron transport properties in LAr. An electron drift stack with up to 25 cm length is constructed to study electron drift, diffusion, and attachment at various electric fields. A gold photocathode and a pulsed laser are used as a bright electron source. The operational performance of this system is reported.