Improved edge charge exchange recombination spectroscopy in DIII-D

Chrystal, C.; Burrell, K. H.; Grierson, B. A.; Haskey, S. R.; Groebner, R. J.; Kaplan, D. H.; Briesemeister, A.

doi:10.1063/1.4958915

Title: Improved edge charge exchange recombination spectroscopy in DIII-D

Abstract

The charge exchange recombination spectroscopy diagnostic on the DIII-D tokamak has been upgraded with the addition of more high radial resolution view chords near the edge of the plasma (r/a > 0.8). The additional views are diagnosed with the same number of spectrometers by placing fiber optics side-by-side at the spectrometer entrance with a precise separation that avoids wavelength shifted crosstalk without the use of bandpass filters. The new views improve measurement of edge impurity parameters in steep gradient, H-mode plasmas with many different shapes. The number of edge view chords with 8 mm radial separation has increased from 16 to 38. New fused silica fibers have improved light throughput and clarify the observation of non-Gaussian spectra that suggest the ion distribution function can be non-Maxwellian in low collisionality plasmas.

Authors:

^[1];

^[2]; Grierson, B. A. ^[3];

^[3]; Groebner, R. J. ^[2]; Kaplan, D. H. ^[2];

^[4]

Oak Ridge Associated Univ., Oak Ridge, TN (United States)
General Atomics, San Diego, CA (United States)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Publication Date:: Tue Aug 02 00:00:00 EDT 2016

Research Org.:: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); General Atomics, San Diego, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC)

Contributing Org.:: Oak Ridge Associated Universities, Oak Ridge, Tennessee 37831, USA Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543-0451, USA Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA

OSTI Identifier:: 1350535

Alternate Identifier(s):: OSTI ID: 1287042; OSTI ID: 1372083

Grant/Contract Number:: AC02-09CH11466; AC05-00OR22725; FC02-04ER54698

Resource Type:: Accepted Manuscript

Journal Name:: Review of Scientific Instruments

Additional Journal Information:: Journal Volume: 87; Journal Issue: 11; Journal ID: ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; plasma diagnostics; charge exchange reactions; particle distribution functions; image sensors; Maxwell equations

Citation Formats


                    Chrystal, C., Burrell, K. H., Grierson, B. A., Haskey, S. R., Groebner, R. J., Kaplan, D. H., and Briesemeister, A. Improved edge charge exchange recombination spectroscopy in DIII-D.  United States: N. p., 2016. 
Web.  doi:10.1063/1.4958915.

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                    Chrystal, C., Burrell, K. H., Grierson, B. A., Haskey, S. R., Groebner, R. J., Kaplan, D. H., & Briesemeister, A. Improved edge charge exchange recombination spectroscopy in DIII-D.  United States.  https://doi.org/10.1063/1.4958915

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                    Chrystal, C., Burrell, K. H., Grierson, B. A., Haskey, S. R., Groebner, R. J., Kaplan, D. H., and Briesemeister, A. Tue .  
"Improved edge charge exchange recombination spectroscopy in DIII-D".  United States.  https://doi.org/10.1063/1.4958915.  https://www.osti.gov/servlets/purl/1350535.

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@article{osti_1350535,

  title        = {Improved edge charge exchange recombination spectroscopy in DIII-D},

  author       = {Chrystal, C. and Burrell, K. H. and Grierson, B. A. and Haskey, S. R. and Groebner, R. J. and Kaplan, D. H. and Briesemeister, A.},

  abstractNote = {The charge exchange recombination spectroscopy diagnostic on the DIII-D tokamak has been upgraded with the addition of more high radial resolution view chords near the edge of the plasma (r/a > 0.8). The additional views are diagnosed with the same number of spectrometers by placing fiber optics side-by-side at the spectrometer entrance with a precise separation that avoids wavelength shifted crosstalk without the use of bandpass filters. The new views improve measurement of edge impurity parameters in steep gradient, H-mode plasmas with many different shapes. The number of edge view chords with 8 mm radial separation has increased from 16 to 38. New fused silica fibers have improved light throughput and clarify the observation of non-Gaussian spectra that suggest the ion distribution function can be non-Maxwellian in low collisionality plasmas.},

  doi          = {10.1063/1.4958915},

  journal      = {Review of Scientific Instruments},

  number       = 11,

  volume       = 87,

  place        = {United States},

  year         = {Tue Aug 02 00:00:00 EDT 2016},

  month        = {Tue Aug 02 00:00:00 EDT 2016}

}

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Works referenced in this record:

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Isler, R. C.
Plasma Physics and Controlled Fusion, Vol. 36, Issue 2
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A fast charge coupled device detector for charge exchange recombination spectroscopy on the DIII-D Tokamak
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Thomas, D. M.; Burrell, K. H.; Groebner, R. J.
Review of Scientific Instruments, Vol. 68, Issue 2
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Multichordal visible/near‐UV spectroscopy on the DIII‐D tokamak
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Seraydarian, R. P.; Burrell, K. H.; Groebner, R. J.
Review of Scientific Instruments, Vol. 59, Issue 8
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High spatial and temporal resolution visible spectroscopy of the plasma edge in DIII‐D
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Gohil, P.; Burrell, K. H.; Groebner, R. J.
Review of Scientific Instruments, Vol. 61, Issue 10
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Kinetic neoclassical transport in the H-mode pedestal
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Battaglia, D. J.; Burrell, K. H.; Chang, C. S.
Physics of Plasmas, Vol. 21, Issue 7
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Calculation of impurity poloidal rotation from measured poloidal asymmetries in the toroidal rotation of a tokamak plasma
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Chrystal, C.; Burrell, K. H.; Grierson, B. A.
Review of Scientific Instruments, Vol. 83, Issue 10
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Spectroscopic study of edge poloidal rotation and radial electric fields in the DIII‐D tokamak (invited)
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Groebner, R. J.; Burrell, K. H.; Gohil, P.
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Improved charge-coupled device detectors for high-speed, charge exchange spectroscopy studies on the DIII-D tokamak
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Burrell, K. H.; Gohil, P.; Groebner, R. J.
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Sizing up plasmas using dimensionless parameters
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Petty, C. C.
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High resolution main-ion charge exchange spectroscopy in the DIII-D H-mode pedestal
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Grierson, B. A.; Burrell, K. H.; Chrystal, C.
Review of Scientific Instruments, Vol. 87, Issue 11
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Multichordal charge exchange recombination spectroscopy on the Doublet III tokamak
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Seraydarian, R. P.; Burrell, K. H.; Brooks, N. H.
Review of Scientific Instruments, Vol. 57, Issue 2
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Application of dimensionless parameter scaling techniques to the design and interpretation of magnetic fusion experiments
journal, March 2008

Luce, T. C.; Petty, C. C.; Cordey, J. G.
Plasma Physics and Controlled Fusion, Vol. 50, Issue 4
DOI: 10.1088/0741-3335/50/4/043001

Wavelength calibration of the charge exchange recombination spectroscopy system on the DIII-D tokamak
journal, January 1999

Gohil, P.; Burrell, K. H.; Groebner, R. J.
Review of Scientific Instruments, Vol. 70, Issue 1
DOI: 10.1063/1.1149288

Improved charge coupled device detectors for the edge charge exchange spectroscopy system on the DIII-D tokamak
journal, January 2001

Burrell, K. H.; Kaplan, D. H.; Gohil, P.
Review of Scientific Instruments, Vol. 72, Issue 1
DOI: 10.1063/1.1319363

Characterization of cross-section correction to charge exchange recombination spectroscopy rotation measurements using co- and counter-neutral-beam views
journal, October 2008

Solomon, W. M.; Burrell, K. H.; Feder, R.
Review of Scientific Instruments, Vol. 79, Issue 10
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Works referencing / citing this record:

Synthetic diagnostic for assessing spatial averaging of charge exchange recombination spectroscopy measurements
journal, October 2018

Chrystal, C.; Sulyman, A. A.; Haskey, S. R.
Review of Scientific Instruments, Vol. 89, Issue 10
DOI: 10.1063/1.5036964

Active spectroscopy measurements of the deuterium temperature, rotation, and density from the core to scrape off layer on the DIII-D tokamak (invited)
journal, October 2018

Haskey, S. R.; Grierson, B. A.; Stagner, L.
Review of Scientific Instruments, Vol. 89, Issue 10
DOI: 10.1063/1.5038349

Impact of ELM control techniques on tungsten sputtering in the DIII-D divertor and extrapolations to ITER
journal, June 2019

Abrams, T.; Unterberg, E. A.; Rudakov, D. L.
Physics of Plasmas, Vol. 26, Issue 6
DOI: 10.1063/1.5089895

Predict-first experiments and modeling of perturbative cold pulses in the DIII-D tokamak
journal, June 2019

Rodriguez-Fernandez, P.; White, A. E.; Howard, N. T.
Physics of Plasmas, Vol. 26, Issue 6
DOI: 10.1063/1.5096800

Main ion and impurity edge profile evolution across the L- to H-mode transition on DIII-D
journal, August 2018

Haskey, S. R.; Grierson, B. A.; Chrystal, C.
Plasma Physics and Controlled Fusion, Vol. 60, Issue 10
DOI: 10.1088/1361-6587/aad702

Experimental characterization of the effect of E × B shear on edge-harmonic oscillation mode structure
journal, June 2019

Chen, M.; Luo, C.; Zhu, Y.
Plasma Physics and Controlled Fusion, Vol. 61, Issue 8
DOI: 10.1088/1361-6587/ab2174

Deuterium temperature, drift velocity, and density measurements in non-Maxwellian plasmas at ASDEX Upgrade
journal, February 2018

Salewski, M.; Geiger, B.; Jacobsen, A. S.
Nuclear Fusion, Vol. 58, Issue 3
DOI: 10.1088/1741-4326/aaa6e1

Edge localized mode suppression and plasma response using mixed toroidal harmonic resonant magnetic perturbations in DIII-D
journal, January 2019

Gu, S.; Sun, Y.; Paz-Soldan, C.
Nuclear Fusion, Vol. 59, Issue 2
DOI: 10.1088/1741-4326/aaf5a3

Modeling of inter- and intra-edge-localized mode tungsten erosion during DIII-D H-mode discharges
journal, October 2019

Xu, G. L.; Guterl, J.; Abrams, T.
Nuclear Fusion, Vol. 59, Issue 12
DOI: 10.1088/1741-4326/ab3e96

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Title: Improved edge charge exchange recombination spectroscopy in DIII-D

Abstract

Citation Formats

An overview of charge-exchange spectroscopy as a plasma diagnostic journal, February 1994

A fast charge coupled device detector for charge exchange recombination spectroscopy on the DIII-D Tokamak journal, February 1997

Multichordal visible/near‐UV spectroscopy on the DIII‐D tokamak journal, August 1988

High spatial and temporal resolution visible spectroscopy of the plasma edge in DIII‐D journal, October 1990

Kinetic neoclassical transport in the H-mode pedestal journal, July 2014

Calculation of impurity poloidal rotation from measured poloidal asymmetries in the toroidal rotation of a tokamak plasma journal, October 2012

Spectroscopic study of edge poloidal rotation and radial electric fields in the DIII‐D tokamak (invited) journal, October 1990

Improved charge-coupled device detectors for high-speed, charge exchange spectroscopy studies on the DIII-D tokamak journal, October 2004

Sizing up plasmas using dimensionless parameters journal, August 2008

High resolution main-ion charge exchange spectroscopy in the DIII-D H-mode pedestal journal, September 2016

Multichordal charge exchange recombination spectroscopy on the Doublet III tokamak journal, February 1986

Application of dimensionless parameter scaling techniques to the design and interpretation of magnetic fusion experiments journal, March 2008

Wavelength calibration of the charge exchange recombination spectroscopy system on the DIII-D tokamak journal, January 1999

Improved charge coupled device detectors for the edge charge exchange spectroscopy system on the DIII-D tokamak journal, January 2001

Characterization of cross-section correction to charge exchange recombination spectroscopy rotation measurements using co- and counter-neutral-beam views journal, October 2008

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Active spectroscopy measurements of the deuterium temperature, rotation, and density from the core to scrape off layer on the DIII-D tokamak (invited) journal, October 2018

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Main ion and impurity edge profile evolution across the L- to H-mode transition on DIII-D journal, August 2018

Experimental characterization of the effect of E × B shear on edge-harmonic oscillation mode structure journal, June 2019

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Edge localized mode suppression and plasma response using mixed toroidal harmonic resonant magnetic perturbations in DIII-D journal, January 2019

Modeling of inter- and intra-edge-localized mode tungsten erosion during DIII-D H-mode discharges journal, October 2019

An overview of charge-exchange spectroscopy as a plasma diagnostic
journal, February 1994

A fast charge coupled device detector for charge exchange recombination spectroscopy on the DIII-D Tokamak
journal, February 1997

Multichordal visible/near‐UV spectroscopy on the DIII‐D tokamak
journal, August 1988

High spatial and temporal resolution visible spectroscopy of the plasma edge in DIII‐D
journal, October 1990

Kinetic neoclassical transport in the H-mode pedestal
journal, July 2014

Calculation of impurity poloidal rotation from measured poloidal asymmetries in the toroidal rotation of a tokamak plasma
journal, October 2012

Spectroscopic study of edge poloidal rotation and radial electric fields in the DIII‐D tokamak (invited)
journal, October 1990

Improved charge-coupled device detectors for high-speed, charge exchange spectroscopy studies on the DIII-D tokamak
journal, October 2004

Sizing up plasmas using dimensionless parameters
journal, August 2008

High resolution main-ion charge exchange spectroscopy in the DIII-D H-mode pedestal
journal, September 2016

Multichordal charge exchange recombination spectroscopy on the Doublet III tokamak
journal, February 1986

Application of dimensionless parameter scaling techniques to the design and interpretation of magnetic fusion experiments
journal, March 2008

Wavelength calibration of the charge exchange recombination spectroscopy system on the DIII-D tokamak
journal, January 1999

Improved charge coupled device detectors for the edge charge exchange spectroscopy system on the DIII-D tokamak
journal, January 2001

Characterization of cross-section correction to charge exchange recombination spectroscopy rotation measurements using co- and counter-neutral-beam views
journal, October 2008

Synthetic diagnostic for assessing spatial averaging of charge exchange recombination spectroscopy measurements
journal, October 2018

Active spectroscopy measurements of the deuterium temperature, rotation, and density from the core to scrape off layer on the DIII-D tokamak (invited)
journal, October 2018

Impact of ELM control techniques on tungsten sputtering in the DIII-D divertor and extrapolations to ITER
journal, June 2019

Predict-first experiments and modeling of perturbative cold pulses in the DIII-D tokamak
journal, June 2019

Main ion and impurity edge profile evolution across the L- to H-mode transition on DIII-D
journal, August 2018

Experimental characterization of the effect of E × B shear on edge-harmonic oscillation mode structure
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Deuterium temperature, drift velocity, and density measurements in non-Maxwellian plasmas at ASDEX Upgrade
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Modeling of inter- and intra-edge-localized mode tungsten erosion during DIII-D H-mode discharges
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