DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2013 EXPERIMENTAL CAMPAIGN Review | Direct submission with log-in | Request submission without log-in
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Title	356: GAM eigenmode excitation mechanism
Name:	Guiding Wang wangg@fusion.gat.com	Affiliation:	University of California, Los Angeles
Research Area:	Turbulence & Transport	Presentation time:	Not requested
Co-Author(s):	Peebles, Rhodes, McKee, Yan	ITPA Joint Experiment :	No
Description:	To understand the Geodesic Acoustic eigenmode excitation mechanism by diagnosing the transition from a continuum GAM to an eigenmode and/or vice versa	ITER IO Urgent Research Task :	No
Experimental Approach/Plan:	L-mode plasma with heating power ramp
Background:	Both GAM eigenmodes and continuum have been oberved on DIII-D. Generally a continuum exists in Ohmic or low heating power L-mode plasmas, and eigenmodes exist in higher heating power L-modes. Characterization of the transition between these two is desired for a better understanding of the eigenmode excitation mechanism.
Resource Requirements:	ECH and NBI.
Diagnostic Requirements:	all turbulence and profile diagnostics.
Analysis Requirements:	lots
Other Requirements: