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Oct 13 – 18, 2014
Hotel Park Inn Pribaltiyskaya
Europe/Moscow timezone

Gyrokinetic Simulation of Phenomenology of GAMs

Oct 16, 2014, 8:30 AM
4h
Green 8-9 (Hotel Park Inn Pribaltiyskaya)

Green 8-9

Hotel Park Inn Pribaltiyskaya

Saint Petersburg, Russian Federation
Poster Poster 5

Speaker

Dr Timo Kiviniemi (Aalto University)

Description

The global full f nonlinear gyrokinetic code ELMFIRE is used for simulating geodesic acoustic modes (GAMs) over a wide range of parameters. For radial wavelength of GAMs, the agreement between analytic value and simulation results is shown to be good for low collisional regime which is not the case with high collisionality. The isotope scan considering hydrogen, deuterium, tritium and helium was done changing the isotope while keeping all the other parameters fixed. The speed of the radial GAM propagation is shown decrease and radial wavelength is shown to increase as a function of mass. Results are compared to analytic estimates and experimental measurements at the FT–2 and Textor tokamaks.
Paper Number TH/P5-6
Country or International Organisation Finland

Primary author

Dr Timo Kiviniemi (Aalto University)

Co-authors

Dr Jukka Heikkinen (Aalto University) Mr Paavo Niskala (Aalto University) Dr Susan Leerink (Aalto University) Mr Tuomas Korpilo (Aalto University)

Presentation materials