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Title	212: Island seeding with saw teeth pacing: New method to control tearing modes
Name:	Egemen Kolemen ekolemen@pppl.gov	Affiliation:	Princeton Plasma Physics Laboratory
Research Area:	Stability & Disruption Avoidance	Presentation time:	Requested
Co-Author(s):	Basil Duval, Ian Chapman, Rob La Haye, Anders Welander, Dave Humphreys, Wayne Solomon	ITPA Joint Experiment :	No
Description:	Saw teeth pacing has been shown to seed islands. This is achieved by directing the EC on the q=1 surface and modulating the power. At a critical EC modulation frequency and duty cycle, saw teeth formatyion and crash times can be synchronized to the modulation frequency. 2/1 tearing modes are usually triggered by a saw teeth crash. When we know the crash time of the saw teeth, we can preemptively suppress the tearing mode by using the EC at the q=2 surface for a very short just before the crash occurs. This method may bring more robust NTM suppression for the ITER (and ITER relevant targets at DIII-D) and reduce the EC power consumption. these saw teethAt a By adjusting the	ITER IO Urgent Research Task :	No
Experimental Approach/Plan:
Background:
Resource Requirements:	1/2-1 day experimental time. May need PCS upgrade if sawteeth triggering is sensitive to EC deposition distance to the q=1 surface. Then, multiple location EC deposition algorithm has be online.
Diagnostic Requirements:
Analysis Requirements:
Other Requirements: