Resonant ion diffusion in ICRF heated tokamak plasmas
Wave induced particle transport during ion cyclotron heating is studied in tokamak plasmas. Diffusion takes place both in real and velocity space. The real space diffusion occurs due to absorption of the waves' toroidal angular momentum. This process can lead to a pump out of resonating ions in regions with large power densities giving rise to hollow density profiles, lower energy of the heated ions, flattening of the profile of power transfer to the background ion species and toroidal acceleration of the plasma. The transport in real and velocity space is studied by reducing the problem to a time dependent 2-D diffusion problem, 1-D in velocity space and 1-D in real space, which is solved numerically.
Bibliographic Reference: Report: JET-P(88)41 EN (1988)
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 198910461 / Last updated on: 1994-12-01
Original language: en
Available languages: en