Requirement on the ECCD modulation capability for NTM stabilization in ITER

Oikawa, Toshihiro

Electron cyclotron current drive (ECCD) at a magnetic island is planned in ITER to stabilize neoclassical tearing modes (NTMs). EC injection within a rotating island is in scope since it is shown theoretically that modulated ECCD application only inside the island is more effective for NTM stabilization than continuous ECCD that is deposited both inside and outside the island. Thus, modulation frequency required from physics aspects of plasma rotation and NTMs has to be fed back to the EC system design. Based on a modulation frequency evaluated from a plasma rotation profile induced by neutral beam torque input, we will discuss at the meeting uncertainty in the predicted rotation, effectiveness of the modulation operation and so on.

Language	:	English
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Meeting title	:	Joint Meetings of IEA Large Tokamak Workshop on "Control of ELMs and RWM" (W68), US-Japan Workshop on "MHD Behavior and Control of Burning Plasma" (FP3-3) and 11th Meeting of the ITPA MHD Topical Group
Held date	:	2008/02
Location (city)	:	Naka
Location (country)	:	Japan
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Registration No. : BB20073551
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