Revisiting the improved core confinement simulations for FT-2 tokamak

Riccardo Nicolò Iorio*, Laurent Chône, Evgeniy Gusakov, Timo P. Kiviniemi, Serguey Lashkul, Susan Leerink

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

In the present paper, we revisit observations performed in FT-2 tokamak from previous works. Improvements of core confinement are observed and believed to be caused by wide orbits going from collisionless to collisional regimes. Similar phenomena can occur whenever gradient lengths are comparable to the orbit widths at the top of the pedestal and the loss cone is continuously and increasingly filled by heated particles, collisions and turbulent effects. The lower hybrid heating operator is introduced into the ELMFIRE code to increase the ion temperature during the simulations while keeping the edge temperature low with logical boundary condition at the limiter. Particular focus is given on how the radial electric field deviates from the neoclassical value while introducing turbulent effects.

Original languageEnglish
Article numbere202100187
Number of pages6
JournalContributions to Plasma Physics
Volume62
Issue number5-6
Early online date14 Mar 2022
DOIs
Publication statusPublished - Jun 2022
MoE publication typeA1 Journal article-refereed

Keywords

  • gyrokinetic simulation
  • neoclassical plasma
  • tokamak plasma
  • turbulence

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