Revisiting the improved core confinement simulations for FT-2 tokamak
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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6
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Contributions to Plasma Physics, Volume 62, issue 5-6
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.Description
Funding Information: This work has been supported by the Academy of Finland grant nos. 316088, 330050 and 330342. The views and opinions expressed herein do not necessarily reflect those of the Academy of Finland. CSC–IT Center for Science Ltd. is acknowledged for allocation of computational resources for this work. The authors report no conflict of interest. Measurements of the FT‐2 tokamak parameters were supported by the state contract of the Ioffe Institute 0040‐2019‐0023, whereas interpretation of the LH ion heating experiment is funded by the state contract 0034‐2021‐0001. Publisher Copyright: © 2022 The Authors. Contributions to Plasma Physics published by Wiley-VCH GmbH.
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Iorio, R N, Chône, L, Gusakov, E, Kiviniemi, T P, Lashkul, S & Leerink, S 2022, 'Revisiting the improved core confinement simulations for FT-2 tokamak', Contributions to Plasma Physics, vol. 62, no. 5-6, e202100187. https://doi.org/10.1002/ctpp.202100187