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Title: Thermal ion orbit loss and radial electric field in DIII-D

Abstract

A relatively simple model for the generation of the radial electric field, Er, near the outboard boundary in a tokamak is presented. The model posits that Er is established to supply the return current necessary to balance the thermal ion orbit loss current. Comparison with DIII-D data is promising. Features of the model that promote a more negative edge Er are higher ion temperature, lower density, lower impurity ion content, and a shorter pathlength for orbit loss. Lastly, these scalings are consistent with experimentally established access to the high-confinement mode edge transport barrier.

Authors:
ORCiD logo [1];  [2];  [3]
  1. General Atomics, San Diego, CA (United States)
  2. Univ. of California San Diego, La Jolla, CA (United States)
  3. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Publication Date:
Research Org.:
Univ. of California, San Diego, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1350067
Alternate Identifier(s):
OSTI ID: 1229614
Grant/Contract Number:  
FC02-04ER54698; AC02-09CH11466; FG02-07AER54917; FG02-95ER54309
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 22; Journal Issue: 8; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

deGrassie, John S., Boedo, Jose A., and Grierson, Brian A. Thermal ion orbit loss and radial electric field in DIII-D. United States: N. p., 2015. Web. doi:10.1063/1.4928558.
deGrassie, John S., Boedo, Jose A., & Grierson, Brian A. Thermal ion orbit loss and radial electric field in DIII-D. United States. https://doi.org/10.1063/1.4928558
deGrassie, John S., Boedo, Jose A., and Grierson, Brian A. Fri . "Thermal ion orbit loss and radial electric field in DIII-D". United States. https://doi.org/10.1063/1.4928558. https://www.osti.gov/servlets/purl/1350067.
@article{osti_1350067,
title = {Thermal ion orbit loss and radial electric field in DIII-D},
author = {deGrassie, John S. and Boedo, Jose A. and Grierson, Brian A.},
abstractNote = {A relatively simple model for the generation of the radial electric field, Er, near the outboard boundary in a tokamak is presented. The model posits that Er is established to supply the return current necessary to balance the thermal ion orbit loss current. Comparison with DIII-D data is promising. Features of the model that promote a more negative edge Er are higher ion temperature, lower density, lower impurity ion content, and a shorter pathlength for orbit loss. Lastly, these scalings are consistent with experimentally established access to the high-confinement mode edge transport barrier.},
doi = {10.1063/1.4928558},
journal = {Physics of Plasmas},
number = 8,
volume = 22,
place = {United States},
year = {Fri Aug 14 00:00:00 EDT 2015},
month = {Fri Aug 14 00:00:00 EDT 2015}
}

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Free Publicly Available Full Text
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Cited by: 12 works
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Works referenced in this record:

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Works referencing / citing this record:

Improvements to an ion orbit loss calculation in the tokamak edge
journal, December 2016

  • Wilks, T. M.; Stacey, W. M.
  • Physics of Plasmas, Vol. 23, Issue 12
  • DOI: 10.1063/1.4968219

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

Analysis Of Equilibrium And Turbulent Fluxes Across The Separatrix In A Gyrokinetic Simulation [Supplementary Data]
dataset, April 2018

  • Charidakos, Ioannis Keramidas; Myra, James; Parker, Scott
  • Zenodo-Supplementary information for journal article at DOI: 10.1063/1.5037723, 15 files (333.7 kB)
  • DOI: 10.5281/zenodo.1230040

Analysis of equilibrium and turbulent fluxes across the separatrix in a gyrokinetic simulation
journal, July 2018

  • Keramidas Charidakos, I.; Myra, J. R.; Parker, S.
  • Physics of Plasmas, Vol. 25, Issue 7
  • DOI: 10.1063/1.5037723

Analysis Of Equilibrium And Turbulent Fluxes Across The Separatrix In A Gyrokinetic Simulation [Supplementary Data]
dataset, April 2018

  • Charidakos, Ioannis Keramidas; Myra, James; Parker, Scott
  • Zenodo-Supplementary information for journal article at DOI: 10.1063/1.5037723, 15 files (333.7 kB)
  • DOI: 10.5281/zenodo.1230039

Analysis of equilibrium and turbulent fluxes across the separatrix in a gyrokinetic simulation
text, January 2018