Reduction of transport due to magnetic shear in gyrokinetic simulations of the scrape-off layer

Abstract

The effect of varying magnetic shear on scrape-off layer turbulence and profiles is studied via electromagnetic gyrokinetic simulations of a helical scrape-off layer model. We develop a model helical geometry with magnetic shear and a corresponding field-aligned coordinate system, which is used for simulations with the Gkeyll code. We find that perpendicular transport is reduced in cases with stronger shear, resulting in higher peak particle and heat fluxes to the endplates. Electromagnetic effects slightly increase transport in strong shear cases.

11 pages, 9 figures. arXiv admin note: text overlap with arXiv:2112.06880

References in corpus (6)

• Conservative discontinuous Galerkin scheme of a gyro-averaged Dougherty collision operator
• Improved multispecies Dougherty collisions
• Gyrokinetic treatment of a grazing angle magnetic field
• Kinetic modeling of neutral transport for a continuum gyrokinetic code
• Turbulent broadening of electron heat-flux width in electromagnetic gyrokinetic simulations of a helical scrape-off layer model
• Investigating shear flow through continuum gyrokinetic simulations of limiter biasing in the Texas Helimak