19th European Fusion Theory Conference

Session

ORAL SESSION

Oct 11, 2021, 2:30 PM

Virtual in Consorzio RFX

62. A non-twisting flux tube for local gyrokinetic simulations

Justin Ball (SPC - EPFL, Switzerland)

10/11/21, 2:30 PM

3. Plasma confinement, neoclassical and turbulent plasma transport

Invited

Local gyrokinetic simulations use a field-aligned domain that twists due to the magnetic shear of the background magnetic equilibrium. However, if the magnetic shear is strong and/or the domain is long, the twist can become so extreme that it fails to properly resolve the turbulence. In this work, we derive and implement the non-twisting flux tube, a local simulation domain that remains...

12. Heat transport as a measure of the effective non-integrable volume

Elizabeth Paul (Princeton University)

10/11/21, 3:00 PM

4. Optimization of magnetic confinement devices and 3D magnetic field effects

Oral

Given the large anisotropy of transport processes in magnetized plasmas, the magnetic field structure can strongly impact the heat diffusion: magnetic surfaces and cantori form barriers to transport while chaotic layers and island structures can degrade confinement. When a small but finite amount of perpendicular diffusion is included, the structure of the magnetic field becomes less...