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Title: Turbulence and transport during electron cyclotron heating in the DIII-D tokamak

Abstract

The response of plasma parameters and broad wavenumber turbulence (1--40 cm{sup -1}, k{rho}{sub s} = 0.1--8) to auxiliary electron cyclotron heating (ECH) is reported on. In these plasmas the electron temperature responds most strongly to the ECH while the electron density and ion temperature are kept approximately constant. Thermal fluxes and diffusivities increase appreciably with ECH for both electron and ion channels. Significant changes to the density fluctuations over the full range of measured wavenumbers are observed. This range of wavenumbers encompasses that typically associated with ion temperature gradient, trapped electron mode, and electron temperature gradient modes. Changes in linear growth rates calculated using a gyrokinetic code show consistency with observed fluctuation increases over the whole range of wavenumbers.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
957602
Report Number(s):
UCRL-PROC-232219
TRN: US1005579
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: Presented at: 34th EPS Conference on Plasma Physics, Warsaw, Poland, Jul 02 - Jul 06, 2007
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; CYCLOTRONS; DOUBLET-3 DEVICE; ELECTRON DENSITY; ELECTRON TEMPERATURE; ELECTRONS; FLUCTUATIONS; HEATING; ION TEMPERATURE; PHYSICS; PLASMA; TRANSPORT; TRAPPED ELECTRONS; TURBULENCE

Citation Formats

Rhodes, T L, Peebles, W A, DeBoo, J C, Prater, R, Kinsey, J E, deGrassie, J S, Bravenec, R V, Burrell, K H, Lohr, J, Petty, C C, Nguyen, X V, Doyle, E J, Greenfield, C M, Zeng, L, Zeeland, M A, Wang, G, Makowski, M A, Staebler, G M, John, H E, and Solomon, W M. Turbulence and transport during electron cyclotron heating in the DIII-D tokamak. United States: N. p., 2007. Web.
Rhodes, T L, Peebles, W A, DeBoo, J C, Prater, R, Kinsey, J E, deGrassie, J S, Bravenec, R V, Burrell, K H, Lohr, J, Petty, C C, Nguyen, X V, Doyle, E J, Greenfield, C M, Zeng, L, Zeeland, M A, Wang, G, Makowski, M A, Staebler, G M, John, H E, & Solomon, W M. Turbulence and transport during electron cyclotron heating in the DIII-D tokamak. United States.
Rhodes, T L, Peebles, W A, DeBoo, J C, Prater, R, Kinsey, J E, deGrassie, J S, Bravenec, R V, Burrell, K H, Lohr, J, Petty, C C, Nguyen, X V, Doyle, E J, Greenfield, C M, Zeng, L, Zeeland, M A, Wang, G, Makowski, M A, Staebler, G M, John, H E, and Solomon, W M. Tue . "Turbulence and transport during electron cyclotron heating in the DIII-D tokamak". United States. https://www.osti.gov/servlets/purl/957602.
@article{osti_957602,
title = {Turbulence and transport during electron cyclotron heating in the DIII-D tokamak},
author = {Rhodes, T L and Peebles, W A and DeBoo, J C and Prater, R and Kinsey, J E and deGrassie, J S and Bravenec, R V and Burrell, K H and Lohr, J and Petty, C C and Nguyen, X V and Doyle, E J and Greenfield, C M and Zeng, L and Zeeland, M A and Wang, G and Makowski, M A and Staebler, G M and John, H E and Solomon, W M},
abstractNote = {The response of plasma parameters and broad wavenumber turbulence (1--40 cm{sup -1}, k{rho}{sub s} = 0.1--8) to auxiliary electron cyclotron heating (ECH) is reported on. In these plasmas the electron temperature responds most strongly to the ECH while the electron density and ion temperature are kept approximately constant. Thermal fluxes and diffusivities increase appreciably with ECH for both electron and ion channels. Significant changes to the density fluctuations over the full range of measured wavenumbers are observed. This range of wavenumbers encompasses that typically associated with ion temperature gradient, trapped electron mode, and electron temperature gradient modes. Changes in linear growth rates calculated using a gyrokinetic code show consistency with observed fluctuation increases over the whole range of wavenumbers.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2007},
month = {6}
}

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