Mapping and uncertainty analysis of energy and pitch angle phase space in the DIII-D fast ion loss detector

Pace, D. C.; Pipes, R.; Fisher, R. K.; Van Zeeland, M. A.

doi:10.1063/1.4891596

Title: Mapping and uncertainty analysis of energy and pitch angle phase space in the DIII-D fast ion loss detector

Abstract

New phase space mapping and uncertainty analysis of energetic ion loss data in the DIII-D tokamak provides experimental results that serve as valuable constraints in first-principles simulations of energetic ion transport. Beam ion losses are measured by the fast ion loss detector (FILD) diagnostic system consisting of two magnetic spectrometers placed independently along the outer wall. Monte Carlo simulations of mono-energetic and single-pitch ions reaching the FILDs are used to determine the expected uncertainty in the measurements. Modeling shows that the variation in gyrophase of 80 keV beam ions at the FILD aperture can produce an apparent measured energy signature spanning across 50-140 keV. As a result, these calculations compare favorably with experiments in which neutral beam prompt loss provides a well known energy and pitch distribution.

Authors:

Pace, D. C. ^[1]; Pipes, R. ^[2]; Fisher, R. K. ^[1]; Van Zeeland, M. A. ^[1]

General Atomics, San Diego, CA (United States)
Univ. of Hawaii, Hilo, HI (United States). Dept. of Physics

Publication Date:: Tue Aug 05 00:00:00 EDT 2014

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

Sponsoring Org.:: USDOE Office of Nuclear Energy (NE)

OSTI Identifier:: 1352918

Grant/Contract Number:: FC02-04ER54698

Resource Type:: Accepted Manuscript

Journal Name:: Review of Scientific Instruments

Additional Journal Information:: Journal Volume: 85; Journal Issue: 11; Journal ID: ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats


                    Pace, D. C., Pipes, R., Fisher, R. K., and Van Zeeland, M. A. Mapping and uncertainty analysis of energy and pitch angle phase space in the DIII-D fast ion loss detector.  United States: N. p., 2014. 
Web.  doi:10.1063/1.4891596.

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                    Pace, D. C., Pipes, R., Fisher, R. K., & Van Zeeland, M. A. Mapping and uncertainty analysis of energy and pitch angle phase space in the DIII-D fast ion loss detector.  United States.  https://doi.org/10.1063/1.4891596

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                    Pace, D. C., Pipes, R., Fisher, R. K., and Van Zeeland, M. A. Tue .  
"Mapping and uncertainty analysis of energy and pitch angle phase space in the DIII-D fast ion loss detector".  United States.  https://doi.org/10.1063/1.4891596.  https://www.osti.gov/servlets/purl/1352918.

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@article{osti_1352918,

  title        = {Mapping and uncertainty analysis of energy and pitch angle phase space in the DIII-D fast ion loss detector},

  author       = {Pace, D. C. and Pipes, R. and Fisher, R. K. and Van Zeeland, M. A.},

  abstractNote = {New phase space mapping and uncertainty analysis of energetic ion loss data in the DIII-D tokamak provides experimental results that serve as valuable constraints in first-principles simulations of energetic ion transport. Beam ion losses are measured by the fast ion loss detector (FILD) diagnostic system consisting of two magnetic spectrometers placed independently along the outer wall. Monte Carlo simulations of mono-energetic and single-pitch ions reaching the FILDs are used to determine the expected uncertainty in the measurements. Modeling shows that the variation in gyrophase of 80 keV beam ions at the FILD aperture can produce an apparent measured energy signature spanning across 50-140 keV. As a result, these calculations compare favorably with experiments in which neutral beam prompt loss provides a well known energy and pitch distribution.},

  doi          = {10.1063/1.4891596},

  journal      = {Review of Scientific Instruments},

  number       = 11,

  volume       = 85,

  place        = {United States},

  year         = {Tue Aug 05 00:00:00 EDT 2014},

  month        = {Tue Aug 05 00:00:00 EDT 2014}

}

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Cited by: 4 works

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Works referenced in this record:

Four‐channel ZnS scintillator measurements of escaping tritons in TFTR
journal, April 1989

Zweben, S. J.
Review of Scientific Instruments, Vol. 60, Issue 4
DOI: 10.1063/1.1140366

Scintillator based detector for fast-ion losses induced by magnetohydrodynamic instabilities in the ASDEX upgrade tokamak
journal, May 2009

García-Muñoz, M.; Fahrbach, H. -U.; Zohm, H.
Review of Scientific Instruments, Vol. 80, Issue 5
DOI: 10.1063/1.3121543

Scintillator-based diagnostic for fast ion loss measurements on DIII-D
journal, October 2010

Fisher, R. K.; Pace, D. C.; García-Muñoz, M.
Review of Scientific Instruments, Vol. 81, Issue 10
DOI: 10.1063/1.3490020

Near midplane scintillator-based fast ion loss detector on DIII-D
journal, October 2012

Chen, X.; Fisher, R. K.; Pace, D. C.
Review of Scientific Instruments, Vol. 83, Issue 10
DOI: 10.1063/1.4732063

Characterization of off-axis fishbones
journal, July 2011

Heidbrink, W. W.; Austin, M. E.; Fisher, R. K.
Plasma Physics and Controlled Fusion, Vol. 53, Issue 8
DOI: 10.1088/0741-3335/53/8/085028

Measurements and modeling of Alfvén eigenmode induced fast ion transport and loss in DIII-D and ASDEX Upgrade
journal, May 2011

Van Zeeland, M. A.; Heidbrink, W. W.; Fisher, R. K.
Physics of Plasmas, Vol. 18, Issue 5
DOI: 10.1063/1.3574663

Beam ion losses due to energetic particle geodesic acoustic modes
journal, November 2012

Fisher, R. K.; Pace, D. C.; Kramer, G. J.
Nuclear Fusion, Vol. 52, Issue 12
DOI: 10.1088/0029-5515/52/12/123015

Modulation of prompt fast-ion loss by applied n = 2 fields in the DIII-D tokamak
journal, December 2013

Van Zeeland, M. A.; Ferraro, N. M.; Heidbrink, W. W.
Plasma Physics and Controlled Fusion, Vol. 56, Issue 1
DOI: 10.1088/0741-3335/56/1/015009

A description of the full-particle-orbit-following SPIRAL code for simulating fast-ion experiments in tokamaks
journal, January 2013

Kramer, G. J.; Budny, R. V.; Bortolon, A.
Plasma Physics and Controlled Fusion, Vol. 55, Issue 2
DOI: 10.1088/0741-3335/55/2/025013

Modeling the response of a fast ion loss detector using orbit tracing techniques in a neutral beam prompt-loss study on the DIII-D tokamak
journal, October 2010

Pace, D. C.; Fisher, R. K.; García-Muñoz, M.
Review of Scientific Instruments, Vol. 81, Issue 10
DOI: 10.1063/1.3478996

Loss of alpha-like MeV fusion products from TFTR
journal, August 1990

Zweben, S. J.; Boivin, R. L.; Diesso, M.
Nuclear Fusion, Vol. 30, Issue 8
DOI: 10.1088/0029-5515/30/8/013

Works referencing / citing this record:

Diverse wave-particle interactions for energetic ions that traverse Alfvén eigenmodes on their first full orbit
journal, February 2016

Heidbrink, W. W.; Persico, E. A. D.; Austin, M. E.
Physics of Plasmas, Vol. 23, Issue 2
DOI: 10.1063/1.4941587

Velocity-space sensitivity and tomography of scintillator-based fast-ion loss detectors
journal, August 2018

Galdon-Quiroga, J.; Garcia-Munoz, M.; Salewski, M.
Plasma Physics and Controlled Fusion, Vol. 60, Issue 10
DOI: 10.1088/1361-6587/aad76e

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Similar Records

Title: Mapping and uncertainty analysis of energy and pitch angle phase space in the DIII-D fast ion loss detector

Abstract

Citation Formats

Four‐channel ZnS scintillator measurements of escaping tritons in TFTR journal, April 1989

Scintillator based detector for fast-ion losses induced by magnetohydrodynamic instabilities in the ASDEX upgrade tokamak journal, May 2009

Scintillator-based diagnostic for fast ion loss measurements on DIII-D journal, October 2010

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Beam ion losses due to energetic particle geodesic acoustic modes journal, November 2012

Modulation of prompt fast-ion loss by applied n = 2 fields in the DIII-D tokamak journal, December 2013

A description of the full-particle-orbit-following SPIRAL code for simulating fast-ion experiments in tokamaks journal, January 2013

Modeling the response of a fast ion loss detector using orbit tracing techniques in a neutral beam prompt-loss study on the DIII-D tokamak journal, October 2010

Loss of alpha-like MeV fusion products from TFTR journal, August 1990

Diverse wave-particle interactions for energetic ions that traverse Alfvén eigenmodes on their first full orbit journal, February 2016

Velocity-space sensitivity and tomography of scintillator-based fast-ion loss detectors journal, August 2018

Four‐channel ZnS scintillator measurements of escaping tritons in TFTR
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Scintillator based detector for fast-ion losses induced by magnetohydrodynamic instabilities in the ASDEX upgrade tokamak
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Near midplane scintillator-based fast ion loss detector on DIII-D
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Characterization of off-axis fishbones
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Measurements and modeling of Alfvén eigenmode induced fast ion transport and loss in DIII-D and ASDEX Upgrade
journal, May 2011

Beam ion losses due to energetic particle geodesic acoustic modes
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Modulation of prompt fast-ion loss by applied n = 2 fields in the DIII-D tokamak
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A description of the full-particle-orbit-following SPIRAL code for simulating fast-ion experiments in tokamaks
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Modeling the response of a fast ion loss detector using orbit tracing techniques in a neutral beam prompt-loss study on the DIII-D tokamak
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Loss of alpha-like MeV fusion products from TFTR
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