Speaker
Mr
Ammar Hakim
(Princeton Plasma Physics Laboratory)
Description
We describe results obtained from Gkeyll, a full-F continuum
gyrokinetic code, designed to study turbulence in the edge region of
fusion devices. The edge region is computationally very challenging,
requiring robust algorithms that can handle large amplitude
fluctuations and stable interactions with sheath boundary
conditions. Results of turbulence in a scrape-off layer (SOL) for
NSTX-type parameters with a model magnetic geometry have been
obtained. Key physics of SOL turbulence, such as drive by toroidal bad
curvature and steep gradients and interactions with a model sheath
boundary condition are included. This allows us to perform parameter
scans and physics studies, such as the physics of heat flux width on
the divertor plate, and the amplitude and intermittency of SOL
turbulence. Initial results find that the heat flux narrows as the
connection length is made shorter (the poloidal field becomes
stronger). We have begun studies on the effect of recycling on the
edge, to better understand low-recycling lithium cases. To validate
the code, we have studied turbulence in the straight-field LAPD device
at UCLA and the helical Helimak device at the University of Texas. We
will also describe the extension of the GENE gyrokinetic code to be
full-F, and initial GENE simulations for LAPD.
| Country or International Organization | United States of America |
|---|---|
| Paper Number | TH/P7-23 |
Primary author
Mr
Ammar Hakim
(Princeton Plasma Physics Laboratory)
