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	286: Collisionality scaling of confinement in advanced inductive regimes
Name:	Timothy Luce tim.luce@iter.org	Affiliation:	ITER Organization
Research Area:	Inductive Scenarios	Presentation time:	Not requested
Co-Author(s):		ITPA Joint Experiment :	Yes
Description:	Confinement data in the ITPA joint database for advanced inductive plasmas indicates a strong variation of H98y2 with normalized collision frequency. From the database, it is not possible to determine if this is a real trend or an artifact of the operating space of the contributing tokamaks. However, some serendipitous scans in DIII-D indicate the trend is real. This would be very favorable for ITER, but also call into question projections to ITER using the IPB98y2 scaling. Therefore, this is an important issue for projecting present-day experiments to ITER. A classical collisionality scaling experiment is proposed (n constant as I and T are varied in proportion to B and B^2 respectively). We have successfully repeated such scans in L mode and H mode in the last 2 years, so it is expected that this is straightforward operationally.	ITER IO Urgent Research Task :	No
Experimental Approach/Plan:
Background:	This contributes to ITPA joint experiment IOS-4.3
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