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	362: Investigation of GAMs during I-mode on D3D
Name:	Amanda Hubbard hubbard@psfc.mit.edu	Affiliation:	Massachusetts Institute of Technology
Research Area:	Turbulence & Transport	Presentation time:	Not requested
Co-Author(s):	Anne White, Dennis Whyte (MIT) George Tynan, Istvan Cziegler, J. Boedo (Center for Momentum Transport and Flow Organization, UCSD) G.M. McKee, Z. Yan (U. Wisconsin), L. Schmitz, E. Doyle, L. Zeng (UCLA).	ITPA Joint Experiment :	Yes
Description:	The I-mode regime is extremely attractive for fusion in that it combines a thermal barrier and high energy confinement with high particle transport, preventing accumulation of impurities and removing the need for ELMs. It is also of interest for understanding the physics of edge turbulence, flows and transport barriers, particularly the separation of thermal and particle transport. Recent observations on C-Mod, reported by I. Cziegler at APS, that GAMs are present continuously during, and only during, I-modes and interact with the other turbulence are important in this regard. We propose to study these fluctuations and their role during I-modes on D3D. This will strongly support the 2013 Joint Research Target, and also contribute to ITPA Joint experiments TC-19 and PEP-31.	ITER IO Urgent Research Task :	No
Experimental Approach/Plan:
Background:
Resource Requirements:	NBI, co or balanced injection. And/or ECH (preferred due to ease of power programming). 3 MW total. 150L solid on (or perhaps 150R) would be required for BES; 330R for edge CER data (30L is best for core CER data). We may need to repeat shots to optimize different diagnostics, or may to alternate with 150 L/R or usebeam blips for CER beams to limit the total NBI power.
Diagnostic Requirements:	Essential: Edge fluctuation and flow diagnostics. Including Doppler Backscattering diagnostics (DBS-5, DBS-8) for GAMs, BES, reflectometry, Langmuir probes. Also edge profile diagnostics (Edge TS, Profile reflectometry, CER)
Analysis Requirements:
Other Requirements: