Parameterization of Electron Attachment Rate Constants for Common Impurities in LArTPC Detectors

TL;DR

This paper compiles and parameterizes electron attachment rate constants for common impurities in liquid argon TPC detectors, aiding in detector design and analysis by providing analytical models for these rates.

Contribution

It offers a comprehensive summary and analytical parameterizations of electron attachment rates for impurities in LArTPCs, based on literature data.

Findings

Provides analytical functions for attachment rate constants

Summarizes literature data on impurity effects

Facilitates comparison and extrapolation of rates

Abstract

The ability of free electrons to drift long distances at high velocities in pure liquid argon under an applied electric field has been exploited for the past forty years to implement detectors with increasingly large volumes for high energy physics research. In this paper, we summarize the electron attachment rate constants as a function of the external electric field for common impurities in LArTPC with data from the literature. We further provide analytical functions to parameterize the data, which are useful to compare with new measurements as well as to make extrapolations.