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:: AC02-09CH11466; FC02-04ER54698; FG02-95ER54309

OSTI ID:: 1350067

Alternate ID(s):: OSTI ID: 1229614

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

References (19)

Direction of ion ∇B drift and power threshold in high confinement mode in diverted tokamaks Shaing, K. C. Physics of Plasmas, Vol. 9, Issue 1 https://doi.org/10.1063/1.1428326	journal	January 2002
Prompt toroidal momentum balance with collisionless neutral beam injected torque in DIII-D deGrassie, J. S.; Groebner, R. J.; Burrell, K. H. Physics of Plasmas, Vol. 13, Issue 11 https://doi.org/10.1063/1.2374862	journal	November 2006
Spontaneous rotation sources in a quiescent tokamak edge plasma Chang, C. S.; Ku, S. Physics of Plasmas, Vol. 15, Issue 6 https://doi.org/10.1063/1.2937116	journal	June 2008
Poloidally and radially resolved parallel D+ velocity measurements in the DIII-D boundary and comparison to neoclassical computations Boedo, J. A.; Belli, E. A.; Hollmann, E. Physics of Plasmas, Vol. 18, Issue 3 https://doi.org/10.1063/1.3559492	journal	March 2011
Kinetic neoclassical transport in the H-mode pedestal Battaglia, D. J.; Burrell, K. H.; Chang, C. S. Physics of Plasmas, Vol. 21, Issue 7 https://doi.org/10.1063/1.4886803	journal	July 2014
Intrinsic momentum generation by a combined neoclassical and turbulence mechanism in diverted DIII-D plasma edge Seo, Janghoon; Chang, C. S.; Ku, S. Physics of Plasmas, Vol. 21, Issue 9 https://doi.org/10.1063/1.4894242	journal	September 2014
An estimate of the ion orbit loss rate in tokamaks Shaing, K. C. Physics of Fluids B: Plasma Physics, Vol. 4, Issue 10 https://doi.org/10.1063/1.860385	journal	October 1992
Orthogonal conductivity of a toroidal plasma Boozer, Allen H. Physics of Fluids, Vol. 19, Issue 1 https://doi.org/10.1063/1.861312	journal	January 1976
Beyond paradigm: Turbulence, transport, and the origin of the radial electric field in low to high confinement mode transitions in the DIII‐D tokamak Moyer, R. A.; Burrell, K. H.; Carlstrom, T. N. Physics of Plasmas, Vol. 2, Issue 6 https://doi.org/10.1063/1.871263	journal	June 1995
Predicting the radial electric field imposed by externally driven radial currents in tokamaks Cornelis, J.; Sporken, R.; Oost, G. van Nuclear Fusion, Vol. 34, Issue 2 https://doi.org/10.1088/0029-5515/34/2/I01	journal	February 1994
Intrinsic toroidal velocity near the edge of DIII-D H-mode plasmas deGrassie, J. S.; Groebner, R. J.; Burrell, K. H. Nuclear Fusion, Vol. 49, Issue 8 https://doi.org/10.1088/0029-5515/49/8/085020	journal	July 2009
Plasma flow due to a loss-cone distribution centred around the outboard edge in DIII-D deGrassie, J. S.; Müller, S. H.; Boedo, J. A. Nuclear Fusion, Vol. 52, Issue 1 https://doi.org/10.1088/0029-5515/52/1/013010	journal	December 2011
An overview of charge-exchange spectroscopy as a plasma diagnostic Isler, R. C. Plasma Physics and Controlled Fusion, Vol. 36, Issue 2 https://doi.org/10.1088/0741-3335/36/2/001	journal	February 1994
A review of theories of the L-H transition Connor, J. W.; Wilson, H. R. Plasma Physics and Controlled Fusion, Vol. 42, Issue 1 https://doi.org/10.1088/0741-3335/42/1/201	journal	December 1999
Experimental Investigation of the Role of Fluid Turbulent Stresses and Edge Plasma Flows for Intrinsic Rotation Generation in DIII-D H -Mode Plasmas Müller, S. H.; Boedo, J. A.; Burrell, K. H. Physical Review Letters, Vol. 106, Issue 11 https://doi.org/10.1103/PhysRevLett.106.115001	journal	March 2011
Model of L to H -Mode Transition in Tokamak Itoh, Sanae-I.; Itoh, Kimitaka Physical Review Letters, Vol. 60, Issue 22 https://doi.org/10.1103/PhysRevLett.60.2276	journal	May 1988
Bifurcation theory of poloidal rotation in tokamaks: A model for L-H transition Shaing, K.; Crume, E. Physical Review Letters, Vol. 63, Issue 21 https://doi.org/10.1103/PhysRevLett.63.2369	journal	November 1989
Neoclassical Radial Current Balance in Tokamaks and Transition to the H Mode Heikkinen, J. A.; Kiviniemi, T. P.; Peeters, A. G. Physical Review Letters, Vol. 84, Issue 3 https://doi.org/10.1103/PhysRevLett.84.487	journal	January 2000
MHD Equilibrium Reconstruction in the DIII-D Tokamak Lao, L. L.; John, H. E. St.; Peng, Q. Fusion Science and Technology, Vol. 48, Issue 2 https://doi.org/10.13182/FST48-968	journal	October 2005

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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
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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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