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	368: Investigation of extreme outer wall heating caused by the DIII-D TBM
Name:	Adam McLean mclean@fusion.gat.com	Affiliation:	Lawrence Livermore National Laboratory
Research Area:	Plasma-material Interface	Presentation time:	Not requested
Co-Author(s):	A. McLean, M. Lanctot, G. Kramer, C. Lasnier, J-W. Ahn	ITPA Joint Experiment :	Yes
Description:	An experiment using the TBM and magnetically insensitive ORNL fast infrared (IR) camera is proposed to explore heating of the TBM tile surface with respect to plasma parameters and shaping configurations not investigated in previous TBM experiments (2010 and 2011).	ITER IO Urgent Research Task :	Yes
Experimental Approach/Plan:	Repeat target discharge from 2011 TBM (147603) and vary outer gap, heating, etc. to create validation cases for simulations and attempt to mitigate high sustained heat flux seen in the 2011 experiment.
Background:	Thermal data acquired using the ORNL fast IR camera monitoring the protective tiles on the DIII-D test blanket module (TBM) in 2011 revealed extreme, sustained heat flux of >10 MW/m2. This observation, largely confirmed by extensive fast ion modeling, has major detrimental implications for the ITER outer Be wall which, under this level of heat flux, would melt in <1 second.
Resource Requirements:	TBM installed in DIII-D, 270R0 port, beams, ECH
Diagnostic Requirements:	ORNL fast IR camera installed on support boom at 150R+1, TBM thermocouples, fast ion diagnostics
Analysis Requirements:	Plasma conditions from Thomson scattering, kinetic EFIT magnetic equilibriums, fast ion simulation/modeling for surface thermal deposition (SPIRAL, OFMC, and ASCOT)
Other Requirements:	Fast IR camera calibrated to high temperature beyond the current capability of 1050 degC using a 30+ year old blackbody source owned by GA; ideally 2000 degC. Temperature of the graphite tiles on the TBM was found to go well beyond this upper calibration and thus was dependent on an estimated calibration curve.