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Maturing ECRF technology for plasma control

R.W. Callis1, W.P. Cary1, S. Chu2, J.L. Doane1, R.A. Ellis3, K. Felch2, Y.A. Gorelov1, H.J. Grunloh1, J. Hosea3, K. Kajiwara1, J. Lohr1, T.C. Luce1, J.J. Peavy1, R.I Pinsker1, D. Ponce1, R. Prater1, M. Shapiro4, R.J. Temkin4 and J.F. Tooker1

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The availability of high power (~1 MW), long pulse length (effectively cw), high frequency (>100 GHz) gyrotrons has created the opportunity for enhanced scientific results on magnetic confinement devices for fusion research worldwide. This has led to successful experiments on electron cyclotron heating, electron cyclotron current drive, non-inductive tokamak operation, tokamak energy transport, suppression of instabilities and advanced profile control leading to enhanced performance. The key development in the gyrotron community that has led to the realization of high power long pulse gyrotrons is the availability of edge cooled synthetic diamond gyrotron output windows, which have low loss and excellent thermal and mechanical properties. In addition to the emergence of reliable high power gyrotrons, ancillary equipment for efficient microwave transmission over distances of hundreds of metres, polarization control, diagnostics, and flexible launch geometry have all been developed and proved in regular service.


PACS

52.55.Fa Tokamaks, spherical tokamaks

52.50.Sw Plasma heating by microwaves; ECR, LH, collisional heating

52.55.Wq Current drive; helicity injection

52.35.Py Macroinstabilities (hydromagnetic, e.g., kink, fire-hose, mirror, ballooning, tearing, trapped-particle, flute, Rayleigh-Taylor, etc.)

Subjects

Plasma physics

Dates

Issue 11 (November 2003)

Received 8 November 2002, accepted for publication 18 July 2003

Published 3 November 2003



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