The effect of E{sub r} on MSE measurements of q, a new technique for measuring E{sub r}, and a test of the neoclassical electric field

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Previous analysis of motional-Stark Effect (MSE) data to measure the q-profile ignored contributions from the plasma electric field. The MSE measurements are shown to be sensitive to the electric field and require significant corrections for plasmas with large rotation velocities or pressure gradients. MSE measurements from rotating plasmas on the Tokamak Fusion Test Reactor (TFTR) confirm the significance of these corrections and verify their magnitude. Several attractive configurations are considered for future MSE-based diagnostics for measuring the plasma radial electric field. MSE data from TFTR is analyzed to determine the change in the radial electric field between two plasmas. The ... continued below

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30 p.

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Zarnstorff, M.C.; Synakowski, E.J.; Levinton, F.M. & Batha, S.H. October 1, 1996.

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Description

Previous analysis of motional-Stark Effect (MSE) data to measure the q-profile ignored contributions from the plasma electric field. The MSE measurements are shown to be sensitive to the electric field and require significant corrections for plasmas with large rotation velocities or pressure gradients. MSE measurements from rotating plasmas on the Tokamak Fusion Test Reactor (TFTR) confirm the significance of these corrections and verify their magnitude. Several attractive configurations are considered for future MSE-based diagnostics for measuring the plasma radial electric field. MSE data from TFTR is analyzed to determine the change in the radial electric field between two plasmas. The measured electric field quantitatively agrees with the predictions of neoclassical theory. These results confirm the utility of a MSE electric field measurement.

Physical Description

30 p.

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Also available from the following url: http://www.pppl.gov. See PPPL reports section for full text.; OSTI as DE97050565

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  • Other Information: PBD: Oct 1996

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  • Other: DE97050565
  • Report No.: PPPL--3218
  • Grant Number: AC02-76CH03073
  • DOI: 10.2172/304200 | External Link
  • Office of Scientific & Technical Information Report Number: 304200
  • Archival Resource Key: ark:/67531/metadc685580

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  • October 1, 1996

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  • July 25, 2015, 2:20 a.m.

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  • April 15, 2016, 8:06 p.m.

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Zarnstorff, M.C.; Synakowski, E.J.; Levinton, F.M. & Batha, S.H. The effect of E{sub r} on MSE measurements of q, a new technique for measuring E{sub r}, and a test of the neoclassical electric field, report, October 1, 1996; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc685580/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.