No abstract available

[en] A design for a 50 GHz 100 kW oscillator suitable for plasma heating is described

No abstract available

[en] This paper illustrates how, if confinement were governed by plasma processes alone, the scaling laws derived from invariance principles might be used to predict the performance of future experiments in terms of their heating power P, line density N current I and size a

[en] In the design of neutral injection systems the ion source performance is of great importance. Limits are put on the electrical efficiency, uniformity, operating pressure and proton ratios. We report on recent work in a large magnetic multipole plasma source and the relationship of particle containment to these parameters

No abstract available

[en] The problem of filamentation and spatial depletion of lower-hybrid waves in an inhomogeneous plasma is investigated. Implications to lower-hybrid heating experiments are discussed

[en] The plasma heating system by a pair of C-shaped waveguides near the frequency of lower hybrid resonance (180 kW at 0.8 GHz and 20 ms) in JIPP T-II is described. A consideration is given to C-shaped waveguide launching system and matching procedures

[en] The slowing-down process of fast ions produced by the neutral beam injection into a tokamak plasma has been studied by a simulation code using Monte-Carlo techniques. The energy transfer from the beams to the plasma and the loss of fast ions due to charge exchange and drifting motion are investigated in detail for quasi-perpendicular injection of the 75 keV hydrogen beam into the JT-60 (JAERI large tokamak) plasma

[en] The kinetic theory of tearing mode instabilities in the collisionless limit is reexamined incorporating properly the magnetic shear effects. An important feature of this analysis is the relaxation of constant A approximation usually invoked in the singular layers by earlier authors. It is found that the new effects drastically modify the growth rate characteristics. The stabilization of tearing modes by the localized lower hybrid fields which are present due to parametric heating schemes is also discussed briefly