Abstract
Experimental data are presented for the charge collection efficiency for near-electrode interactions in cryogenic germanium detectors, and analyzed in terms of a model involving a phonon wind-driven expansion of the electron-hole cloud generated at the site of energy deposition. Computer simulations reproduce to an excellent accuracy the collection depth profiles as obtained by experiment and their dependence on the collection field and the nature of the electrode. Electrode-dependent effects in particular are explained by differences in the phonon reflection properties at the interface of the Ge crystal and the electrode.
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Broniatowski, A., Marnieros, S. & Dumoulin, L. Phonon Wind Effects on Charge Collection in Cryogenic Ge Detectors for Rare Event Searches at Low Energies. J Low Temp Phys 209, 308–313 (2022). https://doi.org/10.1007/s10909-022-02817-6
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DOI: https://doi.org/10.1007/s10909-022-02817-6