A prototype liquid Argon Time Projection Chamber for the study of UV laser multi-photonic ionization

TL;DR

This paper presents a prototype liquid Argon TPC designed for UV laser multi-photonic ionization to develop an online monitoring and calibration system for large LAr TPCs, focusing on measuring ionization lifetime and purity.

Contribution

It introduces a novel UV laser-based calibration system for liquid Argon TPCs, enabling real-time purity monitoring and improved detector calibration.

Findings

Successful prototype operation demonstrated feasibility.

First measurements of ionization lifetime using UV laser.

Potential for enhanced calibration in large LAr TPCs.

Abstract

This paper describes the design, realization and operation of a prototype liquid Argon Time Projection Chamber (LAr TPC) detector dedicated to the development of a novel online monitoring and calibration system exploiting UV laser beams. In particular, the system is intended to measure the lifetime of the primary ionization in LAr, in turn related to the LAr purity level. This technique could be exploited by present and next generation large mass LAr TPCs for which monitoring of the performance and calibration plays an important role. Results from the first measurements are presented together with some considerations and outlook.