Effect of parallel magnetic field fluctuations (finite beta) in linear gyro-kinetic stability analysis of drift waves
It is believed that electromagnetic aspects play a crucial role in turbulent transport of finite beta tokamaks driven by micro-instabilities. Recent studies have revealed the existence of an electromagnetic mode called Alfvén-ITG (AITG). Nevertheless in this study, the magnetic field fluctuations were modelled by taking into account only the perpendicular component of the fluctuating B-field. The present work is an attempt to formulate the problem to include the parallel component of the fluctuating B-field and extend the existing code accordingly. It is expected that this would make possible the study of much larger plasma beta effects and to study higher perturbation frequencies and their mode structure. The growth rates thus obtained may serve as estimates of linear transport coefficients and for future bench marking of the (then) global electromagnetic, gyrokinetic, time evolution codes (PIC or otherwise).
Bibliographic Reference: A paper presented at the Joint Varenna-Lausanne International Workshop on "Theory of Fusion Plasmas", Varenna, Italy, August 27-30 2002, and published in EPFL Internal report 737/02, October 2002, pp.19-25.
Availability: Available free of charge from: École Polytechnique Fédérale de Lausanne (EPFL), Ecublens, CH-1015 Lausanne Fax +41-21-6934747 Available online on the workshop website: http://varenna-lausanne.epfl.ch/
Record Number: 200215541 / Last updated on: 2002-11-20
Original language: en
Available languages: en