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	177:
Name:	Michio Okabayashi mokabaya@pppl.gov	Affiliation:	Princeton Plasma Physics Laboratory
Research Area:	ELM Control	Presentation time:	Requested
Co-Author(s):	Go Matsunaga, M. Okabayashi, J. Ferron, C. Holcomb, T. Luce, D. Pace, F. Turco	ITPA Joint Experiment :	No
Description:		ITER IO Urgent Research Task :	No
Experimental Approach/Plan:	To observe the role of EP near edge, we will utilize configurations more stable to OFM. Here, as pre-requisite, we carry out systematic numerical study of MHD stability analogous to classical Fishbone activity reduction. Our initial trial is higher triangularity with various q_profile flatness. Then, off-axis-NBI parametric scan injection-angle / energy will be included. One uncertainty will remain how to estimate the divertor functioning compared with the present configuration. In the experiment, first step of fundamental study of enhanced EP loss by OFM will be documented by full EP diagnostics and series of EP orbit calculation. This operation requires the normal Bt operation for full use of EP diagnostics. Second step of the role of EP component near the edge is investigated using a configuration more stable to internal modes based on numerical studies discussed above. the EP amount near edge will be controlled by various combinations of Off-axis NBI parameters. In addition, Go Matsunaga is considering to carry out the ICH edge heating in AUG as independent assessment of EP near the edge contribution.
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