Improving Calibration of the Large Low-Background Proportional Counter

TL;DR

This paper presents a new pulse shape analysis method for large proportional counters that enhances event selection efficiency and calibration accuracy, crucial for low-yield effect studies.

Contribution

The paper introduces a novel pulse shape analysis technique that improves calibration and event selection efficiency in large proportional counters.

Findings

Event selection efficiency increased by 25%

Enhanced resolution and energy calibration accuracy

Effective analysis method developed using $^{109}$Cd-source

Abstract

The study of low-yield effects requires not only good quality of the original data but also puts high requirements for their processing procedures to increase the efficiency of the selection of useful events. The exploiting of the large cylindrical proportional counter's electrostatic topology allows improving the extrapolation of information about the primary ionization of a multipoint event. Long-term calibration measurements with an external $^{109}$Cd-source allowed the development of a new method for analyzing the pulse shape from a sizeable proportional counter. Optimized analysis of the current's pulse shape from the electron cloud of primary ionization in the counter improved the resolution and energy calibration. As a result, the efficiency of selecting useful events was increased by 25\%.