Behaviour of central plasma relaxation oscillations during localized electron cyclotron heating on the TCV tokamak

Z.A. Pietrzyk, A. Pochelon, T.P. Goodman, M.A. Henderson, J.-P. Hogge, H. Reimerdes, M.Q. Tran, R. Behn, I. Furno, J.-M. Moret1999年被引用 49Nuclear FusionIF 3 出版社

During initial studies of ECRH in the TCV tokamak, non-standard central MHD activities, such as humpbacksand saturated and inverted sawteeth, have been observed while changing the heating location, the ECRH power, theplasma shape and the safety factor. For edge safety factors qa > 4.5, safety factors on-axis q(0) < 1and small plasmas, complete sawtooth stabilization was achieved with the present 1 MW gyrotron power, and it islikely that sawtooth stabilization can be achieved for all conditions at higher ECRH power. The conditions underwhich the various relaxation activities are produced or suppressed are reported, and the origins for such non-standardbehaviour are discussed.

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