DIII-D RESEARCH OPPORTUNITIES FORUM FOR THE 2013 EXPERIMENTAL CAMPAIGN Review | Direct submission with log-in | Request submission without log-in
Print this page

Print this page
Title	208: qmin control
Name:	Egemen Kolemen ekolemen@pppl.gov	Affiliation:	Princeton Plasma Physics Laboratory
Research Area:	Steady State Heating and Current Drive	Presentation time:	Requested
Co-Author(s):	--	ITPA Joint Experiment :	No
Description:	There has been work on the high dimensional multi-parameter current profile control. This is very hard problem and more importantly very hard to judge the improvements that are achieved from one experiment to another. I propose development of single output control for qmin (or li). This would focus the effort the most important single parameter of interest. The output and performance of this work can be easily understood by regular scientific stuff (it work, it does not work, it works under the following conditions,...). This would enable more feedback from the SS group and better final product within a shorter time frame.	ITER IO Urgent Research Task :	No
Experimental Approach/Plan:	Design a very simple control that can be understood by average scientist (no LQR, LQG,...). For example a proportional control can be designed to be a function of two plasma parameters.
Background:	John Ferron previously (2005-2006) studied the qmin control. This was a one off experiment. The resulting control was not used since then due to various issues. Use gain scheduling Proportional control for qmin (i.e. proportional gain as function of important parameter). The PCS code to gain scheduling was written last year. Combine with Beta control to enable independent control of qmin and Beta. Now we have real-time steerable mirrors, off-axis beams and more capabilities in PCS. It should be possible to
Resource Requirements:	1/2-1 day experimental time. PCS upgrades.
Diagnostic Requirements:	--
Analysis Requirements:	--
Other Requirements:	--