https://doi.org/10.1140/epjc/s10052-022-10884-y
Regular Article - Experimental Physics
A novel wide-angle Compton Scanner setup to study bulk events in germanium detectors
1
Max-Planck-Institut für Physik, Föhringer Ring 6, 80805, Munich, Germany
2
Department of Physics and Astronomy, University of North Carolina, 120 E. Cameron Ave., Phillips Hall, CB3255, 27599, Chapel Hill, NC, USA
3
Triangle Universities Nuclear Laboratory, 116 Science Drive, Duke University, 27708, Durham, NC, USA
Received:
7
February
2022
Accepted:
7
October
2022
Published online:
22
October
2022
A novel Compton Scanner setup has been built, commissioned and operated at the Max-Planck-Institute for Physics in Munich to collect pulses from bulk events in high-purity germanium detectors for pulse shape studies. In this fully automated setup, the detector under test is irradiated from the top with 661.660 keV gammas, some of which Compton scatter inside the detector. The interaction points in the detector can be reconstructed when the scattered gammas are detected with a pixelated camera placed at the side of the detector. The wide range of accepted Compton angles results in shorter measurement times in comparison to similar setups where only perpendicularly scattered gammas are selected by slit collimators. In this paper, the construction of the Compton Scanner, its alignment and the procedure to reconstruct interaction points in the germanium detector are described in detail. The creation of a first pulse shape library for an n-type segmented point-contact germanium detector is described. The spatial reconstruction along the beam axis is validated by a comparison to measured surface pulses. A first comparison of Compton Scanner pulses to simulated pulses is presented to demonstrate the power of the Compton Scanner to test simulation inputs and models.
The original online version of this article was revised: The author name Anna Julia Zsigmond was incorrectly written as Anna Julia J. Zsigmond due to a typesetting mistake.
An erratum to this article is available online at https://doi.org/10.1140/epjc/s10052-022-10963-0.
Copyright comment corrected publication 2022
© The Author(s) 2022. corrected publication 2022
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