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Title: Energy reconstruction of an n-type segmented inverted coaxial point-contact HPGe detector

Abstract

We have characterized, for the first time, an n-type segmented inverted coaxial point-contact detector. This novel detector technology relies on a large variation in drift time of the majority charge carriers, as well as image and net charges observed on the segments, to achieve a potential γ-ray interaction position resolution of better than 1 mm. However, the intrinsic energy resolution in this detector is poor (more than 20 keV at 1332 keV) because of charge (electron) trapping effects. We propose an algorithm that enables restoration of the resolution to a value of 3.44 ± 0.03 keV at 1332 keV for events with a single interaction. The algorithm is based on a measurement of the azimuthal angle and the electron drift time of a given event; the energy of the event is corrected as a function of these two values.

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1436340
Alternate Identifier(s):
OSTI ID: 1550209
Grant/Contract Number:  
[AC02-05CH11231; AC05-00OR22725]
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
[ Journal Volume: 868; Journal Issue: C]; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
United States
Language:
English

Citation Formats

Salathe, M., Cooper, R. J., Crawford, H. L., Radford, D. C., Allmond, J. M., Campbell, C. M., Clark, R. M., Cromaz, M., Fallon, P., Hausladen, P. A., Jones, M. D., Macchiavelli, A. O., and Wright, J. P. Energy reconstruction of an n-type segmented inverted coaxial point-contact HPGe detector. United States: N. p., 2017. Web. doi:10.1016/j.nima.2017.06.036.
Salathe, M., Cooper, R. J., Crawford, H. L., Radford, D. C., Allmond, J. M., Campbell, C. M., Clark, R. M., Cromaz, M., Fallon, P., Hausladen, P. A., Jones, M. D., Macchiavelli, A. O., & Wright, J. P. Energy reconstruction of an n-type segmented inverted coaxial point-contact HPGe detector. United States. doi:10.1016/j.nima.2017.06.036.
Salathe, M., Cooper, R. J., Crawford, H. L., Radford, D. C., Allmond, J. M., Campbell, C. M., Clark, R. M., Cromaz, M., Fallon, P., Hausladen, P. A., Jones, M. D., Macchiavelli, A. O., and Wright, J. P. Sun . "Energy reconstruction of an n-type segmented inverted coaxial point-contact HPGe detector". United States. doi:10.1016/j.nima.2017.06.036. https://www.osti.gov/servlets/purl/1436340.
@article{osti_1436340,
title = {Energy reconstruction of an n-type segmented inverted coaxial point-contact HPGe detector},
author = {Salathe, M. and Cooper, R. J. and Crawford, H. L. and Radford, D. C. and Allmond, J. M. and Campbell, C. M. and Clark, R. M. and Cromaz, M. and Fallon, P. and Hausladen, P. A. and Jones, M. D. and Macchiavelli, A. O. and Wright, J. P.},
abstractNote = {We have characterized, for the first time, an n-type segmented inverted coaxial point-contact detector. This novel detector technology relies on a large variation in drift time of the majority charge carriers, as well as image and net charges observed on the segments, to achieve a potential γ-ray interaction position resolution of better than 1 mm. However, the intrinsic energy resolution in this detector is poor (more than 20 keV at 1332 keV) because of charge (electron) trapping effects. We propose an algorithm that enables restoration of the resolution to a value of 3.44 ± 0.03 keV at 1332 keV for events with a single interaction. The algorithm is based on a measurement of the azimuthal angle and the electron drift time of a given event; the energy of the event is corrected as a function of these two values.},
doi = {10.1016/j.nima.2017.06.036},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = [C],
volume = [868],
place = {United States},
year = {2017},
month = {10}
}

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