Ion temperature anisotropy model with cross‐field drifts in the scrape‐off layer

Zhao, Menglong; Rognlien, Tom; Jarvinen, Aaro; Joseph, Ilon; Umansky, Maxim

doi:10.1002/ctpp.202100164

Title: Ion temperature anisotropy model with cross‐field drifts in the scrape‐off layer

Journal Article · 11 February 2022 · Contributions to Plasma Physics

DOI: https://doi.org/10.1002/ctpp.202100164 · OSTI ID:1996597

Zhao, Menglong ^[1]; Rognlien, Tom ^[1]; Jarvinen, Aaro ^[2]; Joseph, Ilon ^[1]; Umansky, Maxim ^[1]

Lawrence Livermore National Laboratory Livermore California USA
Aalto University Espoo Finland

Abstract An ion temperature anisotropy model including cross‐field drifts has been implemented in the 2D transport code UEDGE. Two ion temperature equations are solved in the model to give separate ion temperatures perpendicular and parallel to the magnetic field, which results in an additional mirror force for ion parallel transport and also leads to an additional curvature drift in the perpendicular direction. In our previous work, an ion temperature anisotropy model was implemented and applied to the full 2D version of UEDGE including recycled neutrals. The simulation results showed that the mirror force due to anisotropy reduces ion parallel flow velocity, however, the simulations were presented without cross‐field electric and magnetic drifts. Nevertheless, in present medium‐size tokamaks or future compact fusion devices, cross‐fields are important. In this work, the anisotropy model is extended to be compatible with the inclusion of cross‐field drifts. Preliminary results on comparison between the model solutions with and without cross‐field drifts are presented.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1996597

Journal Information:: Contributions to Plasma Physics, Journal Name: Contributions to Plasma Physics Journal Issue: 5-6 Vol. 62; ISSN 0863-1042

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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