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Title: A method for determining poloidal rotation from poloidal asymmetry in toroidal rotation (invited)

A new diagnostic has been developed on DIII-D that determines the impurity poloidal rotation from the poloidal asymmetry in the toroidal angular rotation velocity. This asymmetry is measured with recently added tangential charge exchange viewchords on the high-field side of the tokamak midplane. Measurements are made on co- and counter-current neutral beams, allowing the charge exchange cross section effect to be measured and eliminating the need for atomic physics calculations. The diagnostic implementation on DIII-D restricts the measurement range to the core (r/a < 0.6) where, relative to measurements made with the vertical charge exchange system, the spatial resolution is improved. Furthermore, significant physics results have been obtained with this new diagnostic; for example, poloidal rotation measurements that significantly exceed neoclassical predictions.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [2]
  1. Univ. of California-San Diego, La Jolla, CA (United States)
  2. General Atomics, San Diego, CA (United States)
  3. Princeton Univ., Princeton, NJ (United States). Princeton Plasma Physics Lab.
Publication Date:
Grant/Contract Number:
FC02-04ER54698
Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 85; Journal Issue: 11; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Research Org:
General Atomics, San Diego, CA (United States)
Sponsoring Org:
USDOE Office of Nuclear Energy (NE)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
OSTI Identifier:
1352926

Chrystal, Chrystal, Burrell, Keith H., Grierson, Brian A., Lao, Lang L., and Pace, David C.. A method for determining poloidal rotation from poloidal asymmetry in toroidal rotation (invited). United States: N. p., Web. doi:10.1063/1.4891601.
Chrystal, Chrystal, Burrell, Keith H., Grierson, Brian A., Lao, Lang L., & Pace, David C.. A method for determining poloidal rotation from poloidal asymmetry in toroidal rotation (invited). United States. doi:10.1063/1.4891601.
Chrystal, Chrystal, Burrell, Keith H., Grierson, Brian A., Lao, Lang L., and Pace, David C.. 2014. "A method for determining poloidal rotation from poloidal asymmetry in toroidal rotation (invited)". United States. doi:10.1063/1.4891601. https://www.osti.gov/servlets/purl/1352926.
@article{osti_1352926,
title = {A method for determining poloidal rotation from poloidal asymmetry in toroidal rotation (invited)},
author = {Chrystal, Chrystal and Burrell, Keith H. and Grierson, Brian A. and Lao, Lang L. and Pace, David C.},
abstractNote = {A new diagnostic has been developed on DIII-D that determines the impurity poloidal rotation from the poloidal asymmetry in the toroidal angular rotation velocity. This asymmetry is measured with recently added tangential charge exchange viewchords on the high-field side of the tokamak midplane. Measurements are made on co- and counter-current neutral beams, allowing the charge exchange cross section effect to be measured and eliminating the need for atomic physics calculations. The diagnostic implementation on DIII-D restricts the measurement range to the core (r/a < 0.6) where, relative to measurements made with the vertical charge exchange system, the spatial resolution is improved. Furthermore, significant physics results have been obtained with this new diagnostic; for example, poloidal rotation measurements that significantly exceed neoclassical predictions.},
doi = {10.1063/1.4891601},
journal = {Review of Scientific Instruments},
number = 11,
volume = 85,
place = {United States},
year = {2014},
month = {8}
}