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  Temperature Dependence of the Electron-Drift Anisotropy and Implications for the Electron-Drift Model

Abt, I., Gooch, C., Hagemann, F., Hauertmann, L., Hervas Aguilar, D., Liu, X., et al. (2023). Temperature Dependence of the Electron-Drift Anisotropy and Implications for the Electron-Drift Model. Journal of Instrumentation, 18, P10030. Retrieved from https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2022-298.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000F-10E0-1 Version Permalink: https://hdl.handle.net/21.11116/0000-000F-10E1-0
Genre: Journal Article

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 Creators:
Abt, I.1, Author
Gooch, C.1, Author
Hagemann, F.1, Author
Hauertmann, L.1, Author
Hervas Aguilar, D.1, Author
Liu, X.1, Author
Schulz, O.1, Author
Schuster, M.1, Author
Zsigmond, A.J.1, Author
Affiliations:
1Max Planck Institute for Physics, Max Planck Society and Cooperation Partners, ou_2253650              

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Free keywords: GeDet
 Abstract: The electron drift in germanium detectors is modeled making many assumptions. Confronted with data, these assumptions have to be revisited. The temperature dependence of the drift of electrons was studied in detail for an n-type segmented point-contact germanium detector. The detector was mounted in a temperature controlled, electrically cooled cryostat. Surface events were induced with collimated 81 keV photons from a $^{133}$Ba source. A detailed analysis of the rise time of pulses collected in surface scans, performed at different temperatures, is presented. The longitudinal anisotropy of the electron drift decreases with rising temperature. A new approach, making use of designated rise-time windows determined by simulations using SolidStateDetectors.jl, was used to isolate the longitudinal drift of electrons along different axes to quantify this observation. The measured temperature dependence of the longitudinal drift velocities combined with the standard electron drift model as widely used in relevant simulation packages results in unphysical predictions. A first suggestion to modify the electron-drift model is motivated and described. The results of a first implementation of the modified model in SolidStateDetectors.jl are shown. They describe the data reasonably well. A general review of the model and the standard input values for mobilities is suggested.

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 Dates: 2023
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: Other: MPP-2022-298
URI: https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2022-298
arXiv: arxiv:2210.04256
URI: https://inspirehep.net/literature?q=find%20eprint%202210.04256
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Title: Journal of Instrumentation
  Abbreviation : J.Inst.
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 18 Sequence Number: - Start / End Page: P10030 Identifier: -