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Title: Interpretation of rotation and momentum transport in the DIII-D edge plasma and comparison with neoclassical theory

Here, a low-confinement mode discharge which optimizes the capability of the new main-ion chargeexchange-recombination spectroscopy system on DIII-D to measure deuterium toroidal velocity is interpretted in comparison with the predictions of neoclassical theory, with an emphasis on the plasma edge region. The observed peaking in the deuterium toroidal velocity near the separatrix is shown to be consistent with intrinsic co-rotation due to ion orbit loss. In general, the standard neoclassical toroidal and poloidal momentum transport rates are found to be smaller than those inferred from experiment, but a comparison has not yet been made with the more recent extended neoclassical theory that calculates the effects of poloidal asymmetries using an elongated flux surface representation.
Authors:
 [1] ;  [2]
  1. Georgia Inst. of Technology, Atlanta, GA (United States)
  2. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Publication Date:
Grant/Contract Number:
FC02-04ER54698
Type:
Accepted Manuscript
Journal Name:
Nuclear Fusion
Additional Journal Information:
Journal Volume: 54; Journal Issue: 7; Journal ID: ISSN 0029-5515
Publisher:
IOP Science
Research Org:
General Atomics, San Diego, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; rotation; intrinsic rotation; momentum transport
OSTI Identifier:
1376201

Stacey, Weston M., and Grierson, Brian A.. Interpretation of rotation and momentum transport in the DIII-D edge plasma and comparison with neoclassical theory. United States: N. p., Web. doi:10.1088/0029-5515/54/7/073021.
Stacey, Weston M., & Grierson, Brian A.. Interpretation of rotation and momentum transport in the DIII-D edge plasma and comparison with neoclassical theory. United States. doi:10.1088/0029-5515/54/7/073021.
Stacey, Weston M., and Grierson, Brian A.. 2014. "Interpretation of rotation and momentum transport in the DIII-D edge plasma and comparison with neoclassical theory". United States. doi:10.1088/0029-5515/54/7/073021. https://www.osti.gov/servlets/purl/1376201.
@article{osti_1376201,
title = {Interpretation of rotation and momentum transport in the DIII-D edge plasma and comparison with neoclassical theory},
author = {Stacey, Weston M. and Grierson, Brian A.},
abstractNote = {Here, a low-confinement mode discharge which optimizes the capability of the new main-ion chargeexchange-recombination spectroscopy system on DIII-D to measure deuterium toroidal velocity is interpretted in comparison with the predictions of neoclassical theory, with an emphasis on the plasma edge region. The observed peaking in the deuterium toroidal velocity near the separatrix is shown to be consistent with intrinsic co-rotation due to ion orbit loss. In general, the standard neoclassical toroidal and poloidal momentum transport rates are found to be smaller than those inferred from experiment, but a comparison has not yet been made with the more recent extended neoclassical theory that calculates the effects of poloidal asymmetries using an elongated flux surface representation.},
doi = {10.1088/0029-5515/54/7/073021},
journal = {Nuclear Fusion},
number = 7,
volume = 54,
place = {United States},
year = {2014},
month = {5}
}