Synergetic effects of combined NBI-co injection with ICRH and NBI-counter injection in TEXTOR
Important synergetic effects are observed when combining NBI-co and ICRH. These include: (i) increase of incremental confinement time when each heating method is applied to a plasma preheated by the other one; (ii) enhancement of the current drive efficiency resulting in a 50% increase by the addition of an equal amount of RF power; (iii) enhancement of the density domain where sawtooth stabilisation (of the monster type) is achieved, and (iv) significant enhancement of the neutron yield due to beam-target interaction. These effects generally need for their interpretation the assumption of a direct beam acceleration by the RF waves, as is indeed observed by the NPA spectra. A synergetic effect is also seen in the combination NBI-co + NBI-counter leading, as for NBI-co + ICRH, to an improved confinement with respect to the Kaye-Goldston or Goldston L-mode scaling.
Bibliographic Reference: Article: Proceedings of the 13th International Conference on Plasma Physics and Controlled Nuclear Fusion Research, Vol. 1 (1991) pp. 403-410
Record Number: 199111639 / Last updated on: 1994-12-02
Original language: en
Available languages: en