Axes determination for segmented true-coaxial HPGe detectors

I. Abt; A. Caldwell; J. Liu; B. Majorovits; P. Petrov; O. Volynets

doi:10.1140/epjc/s10052-012-1950-0

EPJ

Axes determination for segmented true-coaxial HPGe detectors

I. Abt¹, A. Caldwell¹, J. Liu¹, B. Majorovits¹, P. Petrov² and O. Volynets¹^*

¹ Max-Planck-Institut für Physik, München, Germany
² Department of Physics, Durham University, Durham, UK

Received: 22 December 2011
Revised: 24 January 2012
Published online: 20 March 2012

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.