Electron Landau Damping of Toroidal Alfvén Eigenmodes
A method to calculate the electron Landau damping of toroidal Alfvén eigenmodes (TAE) is presented. Due to the presence of a small current produced by thermal electrons near the trapped-passing boundary, a jump in the electrostatic potential near the k(u) = 0 surface occurs. An analytic expression for this jump is derived in the low-beta, large-aspect-ratio limit, and is suitable for incorporation into either numerical eigenvalue codes or analytic models. In the limit of small magnetic shear, the calculation is carried through analytically, giving a simple local expression for the damping.
Bibliographic Reference: Report: JET-P(95)75 EN (1995) 11pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon, OX14 3EA (GB)
Record Number: 199610507 / Last updated on: 1996-05-13
Original language: en
Available languages: en