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

M. Salathe; R. J. Cooper; H. L. Crawford; D. C. Radford; J. M. Allmond; C. M. Campbell; R. M. Clark; M. Cromaz; P. Fallon; P. A. Hausladen; M. D. Jones; A. O. Macchiavelli; J. P. Wright

doi:10.1016/j.nima.2017.06.036

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

M. Salathe, R. J. Cooper, H. L. Crawford, D. C. Radford, J. M. Allmond, C. M. Campbell, R. M. Clark, M. Cromaz, P. Fallon, P. A. Hausladen, M. D. Jones, A. O. Macchiavelli, J. P. Wright

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

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.

Original language	English
Pages (from-to)	19-26
Number of pages	8
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	868
DOIs	https://doi.org/10.1016/j.nima.2017.06.036
State	Published - Oct 1 2017

Funding

This work is supported by LBNL-LDRD funding under LDRD NS16-128 and by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under Contract No. DE-AC02-05CH11231 (LBNL) and Contract No. DE-AC05-00OR22725 (ORNL).

Keywords

Electron trapping correction
Energy resolution
High purity germanium detectors
γ-ray imaging
γ-ray tracking

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10.1016/j.nima.2017.06.036

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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. (2017). Energy reconstruction of an n-type segmented inverted coaxial point-contact HPGe detector. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 868, 19-26. https://doi.org/10.1016/j.nima.2017.06.036

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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.",

keywords = "Electron trapping correction, Energy resolution, High purity germanium detectors, γ-ray imaging, γ-ray tracking",

author = "M. Salathe 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 M. Cromaz and P. Fallon and Hausladen, {P. A.} and Jones, {M. D.} and Macchiavelli, {A. O.} and Wright, {J. P.}",

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doi = "10.1016/j.nima.2017.06.036",

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Salathe, M, Cooper, RJ, Crawford, HL, Radford, DC , Allmond, JM, Campbell, CM, Clark, RM, Cromaz, M, Fallon, P, Hausladen, PA, Jones, MD, Macchiavelli, AO & Wright, JP 2017, 'Energy reconstruction of an n-type segmented inverted coaxial point-contact HPGe detector', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 868, pp. 19-26. https://doi.org/10.1016/j.nima.2017.06.036

Energy reconstruction of an n-type segmented inverted coaxial point-contact HPGe detector. / Salathe, M.; Cooper, R. J.; Crawford, H. L. et al.
In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 868, 01.10.2017, p. 19-26.

Research output: Contribution to journal › Article › peer-review

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T1 - Energy reconstruction of an n-type segmented inverted coaxial point-contact HPGe detector

AU - Salathe, M.

AU - Cooper, R. J.

AU - Crawford, H. L.

AU - Radford, D. C.

AU - Allmond, J. M.

AU - Campbell, C. M.

AU - Clark, R. M.

AU - Cromaz, M.

AU - Fallon, P.

AU - Hausladen, P. A.

AU - Jones, M. D.

AU - Macchiavelli, A. O.

AU - Wright, J. P.

PY - 2017/10/1

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N2 - 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.

AB - 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.

KW - Electron trapping correction

KW - Energy resolution

KW - High purity germanium detectors

KW - γ-ray imaging

KW - γ-ray tracking

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JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

ER -

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

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Keywords

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