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The TCV tokamak has produced a large number of diverted Single-Null (SN) and Double-Null (DN) plasmas, as well as limited plasmas. Following boronization virtually all discharges drift towards an X-point and several elongated limited plasmas have produced ohmic H-modes. Transitions can be dithering, with the D(alpha) emission well above the L-mode level. Following the transition there generally is an initial ELM-free period. In the example presented there is a short period of irregular mossy ELMs causing low amplitude fluctuations on the D(alpha) signal, followed by several large ELMs which significantly reduce the energy confinement time and interrupt the density rise and a final period of mossy ELMs.

Additional information

Authors: WEISEN H ET AL, Ecole Polytechnique Fédérale de Lausanne, Centre de Recherches enPhysique des Plasmas (CH)
Bibliographic Reference: Article: Proceedings of the 22nd European Physical Society Conference on Controlled Fusion and Plasma Physics, Vol. 19C (1995) Part III, pp. 113-116
Record Number: 199610072 / Last updated on: 1996-02-16
Original language: en
Available languages: en