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Title	5: Measure Intrinsic Rotation Size scaling in DIII-D alone -II
Name:	John deGrassie degrassie@fusion.gat.com	Affiliation:	General Atomics
Research Area:	Plasma Rotation	Presentation time:	Not requested
Co-Author(s):	Wayne Solomon, Brian Grierson, Keith Burrell, John Rice (MIT)	ITPA Joint Experiment :	No
Description:	*Size Scaling needed to confidently extrapolate to ITER. *Continue experiment started with 2009-51-01 *There, steady (enough) conditions were not obtained in the small and large extremes in major radius, presumably because of lack of operational time with new shapes.	ITER IO Urgent Research Task :	No
Experimental Approach/Plan:	*Measure the Rice scaling slope, Rs, for three similar shapes at different size. Here, V = Rs*W/Ip. *Focus on ECH H-modes + NBI blips to get unpolluted intrinsic rotation. *The sizes listed below have a variation in R^2 of 1.39, which we should be able to measure in the slope. *An R^2 scaling is indicated by direct comparison of the slopes between C-Mod and DIII-D, and fits with one dimensionless fit to the international database, that of MA ~ BetaN, where MA is the so-called Alfvén Mach number (Rice, Ince-Cushman et al).
Background:	*We obtained the three necessary shapes: small 136868.1325 R=1.50 R/a=.35 medium 136871.1345 R=1.64 R/a=.33 large 136878.1345 R=1.77 R/a=.34 The small was plagued by a drift in the control system, shape-wise. The large had wall interaction trouble (small gapout), going in and out of ECH H-mode. Both of these issues can be solved with machine time.
Resource Requirements:	2 day experiment (realistically) Gyrotrons
Diagnostic Requirements:	Standard. Nice to have main ion CER, where the shape allows coverage.
Analysis Requirements:
Other Requirements: