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

deGrassie, John S.; Boedo, Jose A.; Grierson, Brian A.

doi:10.1063/1.4928558

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

Journal Article · Fri Aug 14 00:00:00 EDT 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4928558· OSTI ID:1350067

^[1]; Boedo, Jose A. ^[2]; Grierson, Brian A. ^[3]

General Atomics, San Diego, CA (United States); General Atomics
Univ. of California San Diego, La Jolla, CA (United States)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

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.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of California San Diego, La Jolla, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: FC02-04ER54698

OSTI ID:: 1350067

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 8 Vol. 22; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

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Improvements to an ion orbit loss calculation in the tokamak edge Wilks, T. M.; Stacey, W. M. Physics of Plasmas, Vol. 23, Issue 12 https://doi.org/10.1063/1.4968219	journal	December 2016
Synthetic diagnostic for assessing spatial averaging of charge exchange recombination spectroscopy measurements Chrystal, C.; Sulyman, A. A.; Haskey, S. R. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5036964	journal	October 2018
Analysis of equilibrium and turbulent fluxes across the separatrix in a gyrokinetic simulation Keramidas Charidakos, I.; Myra, J. R.; Parker, S. Physics of Plasmas, Vol. 25, Issue 7 https://doi.org/10.1063/1.5037723	journal	July 2018
Analysis of equilibrium and turbulent fluxes across the separatrix in a gyrokinetic simulation Charidakos, I. Keramidas; Myra, J. R.; Parker, S. arXiv https://doi.org/10.48550/arxiv.1804.10301	text	January 2018
Analysis Of Equilibrium And Turbulent Fluxes Across The Separatrix In A Gyrokinetic Simulation [Supplementary Data] Charidakos, Ioannis Keramidas; Myra, James; Parker, Scott Zenodo-Supplementary information for journal article at DOI: 10.1063/1.5037723, 15 files (333.7 kB) https://doi.org/10.5281/zenodo.1230039	dataset	April 2018
Analysis Of Equilibrium And Turbulent Fluxes Across The Separatrix In A Gyrokinetic Simulation [Supplementary Data] Charidakos, Ioannis Keramidas; Myra, James; Parker, Scott Zenodo-Supplementary information for journal article at DOI: 10.1063/1.5037723, 15 files (333.7 kB) https://doi.org/10.5281/zenodo.1230040	dataset	April 2018

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