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	228: High resolution study of collisionality and target structure in the transition to full detachment
Name:	Adam McLean mclean@fusion.gat.com	Affiliation:	Lawrence Livermore National Laboratory
Research Area:	Divertor & SOL Physics	Presentation time:	Requested
Co-Author(s):	M. Groth, S. Allen	ITPA Joint Experiment :	No
Description:	Using DIII-D??s unique, world-leading diagnostic capabilities, carefully document target characteristics in the transition in recycling regimes to full detachment for validation of state-of-the-art edge modeling.	ITER IO Urgent Research Task :	No
Experimental Approach/Plan:	Determine divertor conditions with steady degree of detachment in semi and fully detached cases. At each, perform full characterization with strike point sweeping to full analyze the outer target with the suite of divertor diagnostics.
Background:	Accurate, fully physics-based validated modeling will be essential for predicting divertor conditions in ITER. Operation in detachment will be required to ensure the survivability of plasma facing components. While recent efforts to model detached conditions in DIII-D have led to significant discrepancies in predicted conditions, recent enhancements to edge diagnostic systems make DIII-D the pre-eminent machine for detailed study of a stepwise scan to fully detached conditions.
Resource Requirements:	LSN with OSP near the DiMES radius with sweeps for outer leg characterization. Gas puffing for high density operation near maximum capable n/nGW before MARFE formation.
Diagnostic Requirements:	Extended/enhanced DTS, high resolution MDS, filtered DiMES TV, filtered Tan TV, floor LPs, compact spectrometers
Analysis Requirements:	Plasma conditions from DTS and LPs, 2-D reconstructions of D and C emission profiles for UEDGE/OEDGE simulation with EIRENE neutral modeling.
Other Requirements:	--