Axes determination for segmented true-coaxial HPGe detectors

TL;DR

This paper introduces a rapid method for identifying the crystallographic axes of segmented true-coaxial HPGe detectors by analyzing segment-occupancy patterns from radioactive source irradiation and comparing them with simulated predictions accounting for charge carrier anisotropy.

Contribution

It presents a novel, fast approach to determine axes in HPGe detectors using pattern analysis and trajectory simulations, improving accuracy and efficiency.

Findings

The method accurately identifies axes in experimental setups.

Simulations incorporating charge carrier anisotropy match measured patterns.

The approach enhances detector characterization processes.

Abstract

A fast method to determine the crystallographic axes of segmented true-coaxial high-purity germanium detectors is presented. It is based on the analysis of segment-occupancy patterns obtained by irradiation with radioactive sources. The measured patterns are compared to predictions for different axes orientations. The predictions require a simulation of the trajectories of the charge carriers taking the transverse anisotropy of their drift into account.