TCAD simulations of internal amplification in high purity germanium detectors

Maneuski, D. and Gostilo, V. (2024) TCAD simulations of internal amplification in high purity germanium detectors. Applied Radiation and Isotopes, 204, 111120. (doi: 10.1016/j.apradiso.2023.111120) (PMID:38029639)

Abstract

Simulations of internal amplification processes in high purity germanium (HPGe) detectors for gamma radiation are presented. The Synopsys Sentaurus Technology Computer-Aided Design (TCAD) package was employed to study conditions favourable to charge multiplication within volume of the detector. The physics model was developed, and validated where possible against known results from existing literature. The model was then applied to a new detector and a systematic study of the measurable parameters influencing charge collection and electric field profile was performed. Evidence of the internal amplification in the developed HPGe detector model was demonstrated at 4 kV bias voltage with anode diameter below 100 μm, corresponding to 16 kV/cm electric field and when an additional dopant with concentrations >5×1010cm−3 under the anode implanted. These effects were also simulated and observed in silicon detectors, giving additional confidence in the validity of the findings for germanium, presented in this work.

• Item Type: Articles
• Additional Information: This work has been supported by the STFC grant, UK ST/S000887/1. The authors thank A. Starostin (ITEPh) for many fruitful discussions of the challenges stated in this work. The authors acknowledge A. Sokolov and R. Nurgalejev (BSI) for their comprehensive discussion of the manufacturing aspects of the HPGe detectors. The authors are grateful to D. Spiteri (UofG) for helpful discussion on the manuscript and its content.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Maneuski, Dr Dima

Creator Roles

Maneuski, D.: Writing – original draft, Software, Methodology, Investigation, Data curation, Conceptualization

• Authors: Maneuski, D., and Gostilo, V.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Applied Radiation and Isotopes
• Publisher: Elsevier
• ISSN: 0969-8043
• ISSN (Online): 1872-9800
• Published Online: 22 November 2023
• Copyright Holders: Copyright © 2023 The Authors
• First Published: First published in Applied Radiation and Isotopes 204: 111120
• Publisher Policy: Reproduced under a Creative Commons License

Project Code	Award No	Project Name	Principal Investigator	Funder's Name	Funder Ref	Lead Dept
302375		Particle Physics Experiment (PPE) Consolidated	Anthony Doyle	Science and Technology Facilities Council (STFC)	ST/S000887/1	P&S - Physics & Astronomy