论文信息 - Review of experiments on current drive in Tokamaks by means of RF waves

Review of experiments on current drive in Tokamaks by means of RF waves

This paper reviews the experimental results on lower hybrid current drive in tokamak plasmas. Pulse lengths of 3.5 seconds and currents above 400 kA have been generated at plasma densities such that the wave frequency is greater than about twice the lower hybrid frequency. Current drive ceases above a critical density, nc. However, nc increases with wave frequency. So that for f = 4.6 GHz current drive has been seen at ec ≈1014 cm-3 and a density limit has yet to be established. Evidence for a collisional scaling law for current-drive efficiency is summarized. Detailed measurements of bremsstrahlung X-rays show a distribution which is qualitatively similar to that predicted by quasilinear theory. Microwave emission at frequencies less than the plasma frequency may shed light on the current-drive mechanisn. Applications of current drive including plasma and current start-up and transformer recharging are discussed.

W. Hooke | W. Hooke

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