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Title	380: ELM Suppression at Lower Collisionality with Non-Resonant n=3 I-coil
Name:	Thomas Osborne osborne@fusion.gat.com	Affiliation:	General Atomics
Research Area:	ELM Control	Presentation time:	Not requested
Co-Author(s):		ITPA Joint Experiment :	No
Description:	This experiment would attempt to obtain suppression of Type I ELMs by using no-resonant I-coil fields to enhance Type II ELM activity in discharges which naturally exhibit strong Type II activity at lower collisionality. ELM suppression without the strong pedestal pressure reduction observed in RMP low collisionality cases might be obtained with this approach. In this experiment we would obtain discharges with strong Type II activity, perhaps close to double null conditions at lower collisionality and apply odd parity n=3 fields with the I-coil. Scan q95. There is some evidence that the suppression of type I ELMs in higher collisionality odd Icoil parity discharges was through enhancement of the Type II ELM activity. In contrast to RMP suppression of ELMs at low collisionality, these discharges showed little change in pedestal pressure in the absence of Type I ELMs. Although Type II activity is generally enhanced with increasing collisionality it is also a function of plasma shape and other parameters. It is possible that the effect of the non-resonant fields on Type II activity is not a function of collisionality and therefore might still function in a lower collisionality discharge with strong enough Type II activity.	ITER IO Urgent Research Task :	No
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