Ion temperature dynamics for the edge and scrape-off layer plasma turbulence: role of gyro-viscosity and vorticity

• DOI: 10.1088/1402-4896/ad2045
• Publication Date: 2024-01-18T22:42:39Z
• Authors: N Bisai
• Keywords: 0103 physical sciences; 01 natural sciences

Abstract In the presence of magnetic curvature and density/pressure inhomogeneity, edge scrape-off layer (SOL) regions a tokamak plasma are highly turbulent mainly because drift/interchange instability mechanisms. The divergence ion polarization drift contains diamagnetic <?CDATA $\vec{E}\times \vec{B}$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mover accent="true"> <mml:mrow> <mml:mi>E</mml:mi> </mml:mrow> <mml:mo>⃗</mml:mo> </mml:mover> <mml:mo>×</mml:mo> <mml:mi>B</mml:mi> </mml:math> velocity to define vorticity convection fluid, which can be approximated in several ways using various combinations these two drifts. Here, this work, three different approximations used represent models solved numerically. numerical results indicate that basic turbulence like radial profiles, electric field gradients, fluctuation labels, Reynolds stress widely from models. As provide results, therefore, one must careful use for description turbulence. This work may useful choosing appropriate include temperature gradients studies on tokamaks/stellarators. role gyro-viscosity has been identified work.