Gamma ray imager on the DIII-D tokamak

Pace, D. C.; Cooper, C. M.; Taussig, D.; Eidietis, N. W.; Hollmann, E. M.; Riso, V.; Van Zeeland, M. A.; Watkins, M.

doi:10.1063/1.4945566

Title: Gamma ray imager on the DIII-D tokamak

Journal Article · Wed Apr 13 00:00:00 EDT 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4945566· OSTI ID:1371566

^[1]; Cooper, C. M. ^[2]; Taussig, D. ^[1]; Eidietis, N. W. ^[1]; Hollmann, E. M. ^[3]; Riso, V. ^[4]; Van Zeeland, M. A. ^[1]; Watkins, M. ^[1]

General Atomics, San Diego, CA (United States)
Oak Ridge Associated Univ., Oak Ridge, TN (United States)
Univ. of California, San Diego, CA (United States)
State Univ. of New York (SUNY), Buffalo, NY (United States)

A gamma ray camera is built for the DIII-D tokamak [J. Luxon, Nucl. Fusion 42, 614 (2002)] that provides spatial localization and energy resolution of gamma flux by combining a lead pinhole camera with custom-built detectors and optimized viewing geometry. This diagnostic system is installed on the outer midplane of the tokamak such that its 123 collimated sightlines extend across the tokamak radius while also covering most of the vertical extent of the plasma volume. A set of 30 bismuth germanate detectors can be secured in any of the available sightlines, allowing for customizable coverage in experiments with runaway electrons in the energy range of 1- 60 MeV. Commissioning of the gamma ray imager includes the quantification of electromagnetic noise sources in the tokamak machine hall and a measurement of the energy spectrum of background gamma radiation. In conclusion, first measurements of gamma rays coming from the plasma provide a suitable testbed for implementing pulse height analysis that provides the energy of detected gamma photons.

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Research Organization:: General Atomics, San Diego, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE Office of Science (SC), Workforce Development for Teachers and Scientists (WDTS)

Grant/Contract Number:: FC02-04ER54698; AC05-06OR23100; FG02-07ER54912

OSTI ID:: 1371566

Alternate ID(s):: OSTI ID: 1247218

Journal Information:: Review of Scientific Instruments, Vol. 87, Issue 4; Related Information: D.C. Pace, C.M. Cooper, D. Taussig, N.W. Eidietis, E.M. Hollmann, V. Riso, M.A. Van Zeeland, M. Watkins, "Gamma Ray Imager on the DIII-D Tokamak", Rev. Sci. Instr. 87, 043507 (2016); ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 24 works

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References (14)

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Resolving runaway electron distributions in space, time, and energy Paz-Soldan, C.; Cooper, C. M.; Aleynikov, P. Physics of Plasmas, Vol. 25, Issue 5 https://doi.org/10.1063/1.5024223	journal	May 2018
JET diagnostic enhancements testing and commissioning in preparation for DT scientific campaigns Figueiredo, J.; Murari, A.; Perez Von Thun, C. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5038548	journal	October 2018
Development of a new compact gamma-ray spectrometer optimised for runaway electron measurements Dal Molin, A.; Martinelli, L.; Nocente, M. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5038803	journal	October 2018
Development of gamma ray spectrometer with high energy and time resolutions on EAST tokamak Zhou, R. J.; Zhong, G. Q.; Hu, L. Q. Review of Scientific Instruments, Vol. 90, Issue 12 https://doi.org/10.1063/1.5120843	journal	December 2019
Low-frequency whistler waves in quiescent runaway electron plasmas Heidbrink, W. W.; Paz-Soldan, C.; Spong, D. A. Plasma Physics and Controlled Fusion, Vol. 61, Issue 1 https://doi.org/10.1088/1361-6587/aae2da	journal	November 2018
The role of kinetic instabilities in formation of the runaway electron current after argon injection in DIII-D Lvovskiy, A.; Paz-Soldan, C.; Eidietis, N. W. Plasma Physics and Controlled Fusion, Vol. 60, Issue 12 https://doi.org/10.1088/1361-6587/aae95a	journal	November 2018
MeV range particle physics studies in tokamak plasmas using gamma-ray spectroscopy Nocente, M.; Molin, A. Dal; Eidietis, N. Plasma Physics and Controlled Fusion, Vol. 62, Issue 1 https://doi.org/10.1088/1361-6587/ab4f32	journal	November 2019
Modeling of bremsstrahlung emission from the confined runaway electrons and applications to the hard x-ray monitor of ITER Pandya, Santosh P.; Core, Laura; Barnsley, Robin Physica Scripta, Vol. 93, Issue 11 https://doi.org/10.1088/1402-4896/aaded0	journal	October 2018
Interpretation of runaway electron synchrotron and bremsstrahlung images Hoppe, M.; Embréus, O.; Paz-Soldan, C. Nuclear Fusion, Vol. 58, Issue 8 https://doi.org/10.1088/1741-4326/aaae15	journal	June 2018
Physics of runaway electrons in tokamaks Breizman, Boris N.; Aleynikov, Pavel; Hollmann, Eric M. Nuclear Fusion, Vol. 59, Issue 8 https://doi.org/10.1088/1741-4326/ab1822	journal	June 2019
Observation of rapid frequency chirping instabilities driven by runaway electrons in a tokamak Lvovskiy, A.; Heidbrink, W. W.; Paz-Soldan, C. Nuclear Fusion, Vol. 59, Issue 12 https://doi.org/10.1088/1741-4326/ab4405	journal	September 2019
Interpretation of runaway electron synchrotron and bremsstrahlung images Hoppe, M.; Embréus, O.; Paz-Soldan, C. arXiv https://doi.org/10.48550/arxiv.1712.04193	text	January 2017

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