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Title: Compact, directional neutron detectors capable of high-resolution nuclear recoil imaging

Abstract

We report on the design, production, and performance of compact 40-cm3 Time Projection Chambers (TPCs) that detect fast neutrons by measuring the three-dimensional (3D) ionization distribution of nuclear recoils in 4He:CO 2 gas at atmospheric pressure. We use these detectors to characterize the fast-neutron flux inside the Belle II detector at the SuperKEKB electron–positron collider in Tsukuba, Japan, where the primary design constraint is a small form factor. We find that the TPCs meet or exceed all design specifications, and are capable of measuring the 3D surface shape and charge density profile of ionization clouds from nuclear recoils and charged tracks in exquisite detail. Scaled-up detectors based on the detection principle demonstrated here may be suitable for directional dark matter searches, measurements of coherent neutrino–nucleus scattering, and other experiments requiring precise detection of neutrons or nuclear recoils.

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1580964
Alternate Identifier(s):
OSTI ID: 1559056
Grant/Contract Number:  
AC02-05CH11231; SC0007852; SC0010504; AC05-76RL01830; SC0012704
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: 945; Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Country of Publication:
United States
Language:
English

Citation Formats

Jaegle, I., Lewis, P. M., Garcia-Sciveres, M., Hedges, M. T., Hemperek, T., Janssen, J., Ji, Q., Pohl, D. -L., Ross, S., Schueler, J., Seong, I., Thorpe, T. N., and Vahsen, S. E. Compact, directional neutron detectors capable of high-resolution nuclear recoil imaging. United States: N. p., 2019. Web. doi:10.1016/j.nima.2019.06.037.
Jaegle, I., Lewis, P. M., Garcia-Sciveres, M., Hedges, M. T., Hemperek, T., Janssen, J., Ji, Q., Pohl, D. -L., Ross, S., Schueler, J., Seong, I., Thorpe, T. N., & Vahsen, S. E. Compact, directional neutron detectors capable of high-resolution nuclear recoil imaging. United States. doi:10.1016/j.nima.2019.06.037.
Jaegle, I., Lewis, P. M., Garcia-Sciveres, M., Hedges, M. T., Hemperek, T., Janssen, J., Ji, Q., Pohl, D. -L., Ross, S., Schueler, J., Seong, I., Thorpe, T. N., and Vahsen, S. E. Fri . "Compact, directional neutron detectors capable of high-resolution nuclear recoil imaging". United States. doi:10.1016/j.nima.2019.06.037.
@article{osti_1580964,
title = {Compact, directional neutron detectors capable of high-resolution nuclear recoil imaging},
author = {Jaegle, I. and Lewis, P. M. and Garcia-Sciveres, M. and Hedges, M. T. and Hemperek, T. and Janssen, J. and Ji, Q. and Pohl, D. -L. and Ross, S. and Schueler, J. and Seong, I. and Thorpe, T. N. and Vahsen, S. E.},
abstractNote = {We report on the design, production, and performance of compact 40-cm3 Time Projection Chambers (TPCs) that detect fast neutrons by measuring the three-dimensional (3D) ionization distribution of nuclear recoils in 4He:CO2 gas at atmospheric pressure. We use these detectors to characterize the fast-neutron flux inside the Belle II detector at the SuperKEKB electron–positron collider in Tsukuba, Japan, where the primary design constraint is a small form factor. We find that the TPCs meet or exceed all design specifications, and are capable of measuring the 3D surface shape and charge density profile of ionization clouds from nuclear recoils and charged tracks in exquisite detail. Scaled-up detectors based on the detection principle demonstrated here may be suitable for directional dark matter searches, measurements of coherent neutrino–nucleus scattering, and other experiments requiring precise detection of neutrons or nuclear recoils.},
doi = {10.1016/j.nima.2019.06.037},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = C,
volume = 945,
place = {United States},
year = {2019},
month = {11}
}

Journal Article:
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This content will become publicly available on November 1, 2020
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