Pulse shape simulation for segmented true-coaxial HPGe detectors

TL;DR

This paper introduces a simulation package for modeling electrical pulse formation in segmented true-coaxial high purity germanium detectors, including electric fields, charge trajectories, bandwidth effects, and noise, validated against experimental data.

Contribution

It presents a comprehensive simulation tool for pulse formation in segmented HPGe detectors, incorporating electric field calculations, charge carrier trajectories, bandwidth, and noise effects.

Findings

Simulated pulses closely match measured signals from the detector.

The model accurately reproduces the effects of bandwidth limitations and noise.

The simulation aids in understanding detector response and optimizing design.

Abstract

A new package to simulate the formation of electrical pulses in segmented true-coaxial high purity germanium detectors is presented. The computation of the electric field and weighting potentials inside the detector as well as of the trajectories of the charge carriers is described. In addition, the treatment of bandwidth limitations and noise are discussed. Comparison of simulated to measured pulses, obtained from an 18-fold segmented detector operated inside a cryogenic test facility, are presented.