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22-27 October 2018
Mahatma Mandir Conference Centre
Asia/Kolkata timezone
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Global gyrokinetic multi-model simulations of ITG and Alfvenic modes for tokamaks and the first operational phase of Wendelstein 7-X

23 Oct 2018, 14:00
4h 45m
Mahatma Mandir Conference Centre

Mahatma Mandir Conference Centre

Gandhinagar (nearest Airport: Ahmedabad), India
Poster P2 Posters

Speaker

Dr Ralf Kleiber (Max-Planck-Institut für Plasmaphysik)

Description

Results from a hybrid approach (CKA-EUTERPE code) which couples an MHD code with a gyrokinetic code are presented. Although perturbative, it offers a relatively fast way to investigate the destabilisation of Alfven modes by fast particles. TAE saturation amplitudes and their scaling with growth rate and collisionality were investigated in a tokamak as well as in Wendelstein 7-X. Full volume linear electrostatic gyrokinetic simulations for an OP 1.1 Wendelstein 7-X scenario showed modes driven by the strong electron temperature gradient with negligible influence from trapped particles. Using a Fourier solver approach, long-time fully kinetic runs of damped GAEs and TAEs could be performed. Super-resolution methods allowed to accurately resolve the continuous Alfven spectrum.
Country or International Organization Germany
Paper Number TH/P2-4

Primary author

Dr Ralf Kleiber (Max-Planck-Institut für Plasmaphysik)

Co-authors

Dr Axel Könies (Max-Planck-Institut für Plasmaphysik) Mr Christoph Slaby (Max-Planck-Institut für Plasmaphysik) Dr Jörg Riemann (Max-Planck-Institut für Plasmaphysik) Dr Matthias Borchardt (Max-Planck-Institut für Plasmaphysik) Dr Oleksiy Mishchenko (Max-Planck-Institut für Plasmaphysik) Dr Roman Hatzky (Max-Planck-Institut für Plasmaphysik)

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Paper