Abstract Details

files Add files

Presentation:submitted:by:
icc2011_sokolov_poster.pdf2011-09-08 15:38:24Vladimir Sokolov

Measurements of Electron Thermal Transport due to ETG Modes in a Basic Experiment in CLM

Author: Vladimir Sokolov
Requested Type: Poster Only
Submitted: 2011-06-07 13:12:17

Co-authors: A.K.Sen

Contact Info:
Columbia University
500 W 120th street
New York, NY   10027
USA

Abstract Text:
Production and identification of electron temperature gradient (ETG) mode have been successfully done in a basic experiment in Columbia Linear Machine CLM [1]. Now a measurement of electron thermal conductivity via an unique high frequency triple probe yielded a value of K_e ranging between 2-10 m2/s, which corresponds to 1-5 K_e,GB, where the subscript denotes gyro-Bohm . This experimental result appears to agree with a value of non-local thermal conductivity obtained from a rough theoretical estimation [2], and not inconsistent with gyrokinetic simulation results for tokamaks. The first experimental scaling of the thermal conductivity vs the amplitude of ETG fluctuation is also obtained. It is approximately linear, indicating a strong turbulence signature.
This research was supported by U.S. Department of Energy Grant No. DE-FG02-98ER-54464.

[1] X. Wei, V. Sokolov and A.K. Sen, Phys. Plasmas, 17, 042108 (2010).
[2] H.L. Berk et al, Nucl. Fusion, 33, 263 (1993).

Characterization: D4

Comments:

University of Washington

Workshop on Innovation in Fusion Science (ICC2011) and
US-Japan Workshop on Compact Torus Plasma
August 16-19, 2011
Seattle, Washington

ICC 2011