Alfvén Eigenmode Excitation by ICRH Beat-Waves
The resonant excitation of Alfvén Eigenmodes (AE) by ion cyclotron resonance heating (ICRH) beat waves has been attempted experimentally on JET tokamak plasmas. Toroidicity induced AE (TAE) are excited when the difference frequency between 2 ICRH antennas is of the order of the central frequency of the relative Alfvén continuum gap. The relatively large amplitudes for the TAE driven by ICRH beat waves suggest that this new non-linear excitation mechanism could allow investigations into the effects of AE on particle orbits and should be taken into account in ICRH heated thermonuclear plasmas.
Bibliographic Reference: Report: JET-P(95)32 (1995) 10pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon, OX14 3EA (GB)
Record Number: 199610332 / Last updated on: 1996-03-29
Original language: en
Available languages: en