Revisiting the improved core confinement simulations for FT-2 tokamak

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

doi:10.1002/ctpp.202100187

Revisiting the improved core confinement simulations for FT-2 tokamak

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

^*Tämän työn vastaava kirjoittaja

University of Helsinki
Aalto University
IOFFE-Institute

Tutkimustuotos: Lehtiartikkeli › Article › Scientific › vertaisarvioitu

1 Sitaatiot (Scopus)

82 Lataukset (Pure)

Abstrakti

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.

Alkuperäiskieli	Englanti
Artikkeli	e202100187
Sivumäärä	6
Julkaisu	Contributions to Plasma Physics
Vuosikerta	62
Numero	5-6
Varhainen verkossa julkaisun päivämäärä	14 maalisk. 2022
DOI - pysyväislinkit	https://doi.org/10.1002/ctpp.202100187
Tila	Julkaistu - kesäk. 2022
OKM-julkaisutyyppi	A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Rahoitus

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.

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SDG 7 – Edullinen ja puhdas energia

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10.1002/ctpp.202100187Lisenssi: CC BY-NC-ND

Revisiting the improved core confinement simulations for FT-2 tokamakFinal published version, 2,65 MBLisenssi: CC BY-NC-ND

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Linkki julkaisuun Scopuksessa

3 Päättynyt

MoPEF: Molecules and Photons in the edge of fusion plasmas
Groth, M. (Vastuullinen johtaja), Kesälä, A. (Projektin jäsen), Brax, H. (Projektin jäsen), Holm, A. (Projektin jäsen), Mäkelä, T. (Projektin jäsen), Kiviniemi, T. (Projektin jäsen), Myllynen, L. (Projektin jäsen), Rees, D. (Projektin jäsen), Virtanen, P. (Projektin jäsen), Järvinen, A. (Projektin jäsen), Vesa, A. (Projektin jäsen), Kit, A. (Projektin jäsen), Ylikantola, J. (Projektin jäsen), Kuivasniemi, H. (Projektin jäsen), Mäenpää, R. (Projektin jäsen), Solokha, V. (Projektin jäsen), Raskhodchikov, M. (Projektin jäsen), Sissonen, J. (Projektin jäsen), Rikala, V.-P. (Projektin jäsen), Reksoprodjo, H. (Projektin jäsen) & Chandra, R. (Projektin jäsen)
01/09/2020 → 31/08/2024
Projekti: RCF Academy Project
-: Turbulentti kuljetus fuusioplasmassa
Kiviniemi, T. (Vastuullinen johtaja)
01/02/2020 → 31/12/2022
Projekti: Academy of Finland: Other research funding
-: Syklokineettinen reunaturbulenssi tokamak-plasmassa
Kiviniemi, T. (Vastuullinen johtaja), Albert Devasagayam, F. (Projektin jäsen), Virtanen, A. (Projektin jäsen), Iorio, R. (Projektin jäsen), Chone, L. (Projektin jäsen), Simojoki, H. (Projektin jäsen), Leerink, S. (Projektin jäsen), Systä, H. (Projektin jäsen) & Silvennoinen, A. (Projektin jäsen)
01/09/2018 → 31/12/2022
Projekti: Academy of Finland: Other research funding

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title = "Revisiting the improved core confinement simulations for FT-2 tokamak",

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.",

keywords = "gyrokinetic simulation, neoclassical plasma, tokamak plasma, turbulence",

author = "Iorio, \{Riccardo Nicol{\`o}\} and Laurent Ch{\^o}ne and Evgeniy Gusakov and Kiviniemi, \{Timo P.\} and Serguey Lashkul and Susan Leerink",

note = "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: {\textcopyright} 2022 The Authors. Contributions to Plasma Physics published by Wiley-VCH GmbH.",

year = "2022",

month = jun,

doi = "10.1002/ctpp.202100187",

language = "English",

volume = "62",

journal = "Contributions to Plasma Physics",

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TY - JOUR

T1 - Revisiting the improved core confinement simulations for FT-2 tokamak

AU - Iorio, Riccardo Nicolò

AU - Chône, Laurent

AU - Gusakov, Evgeniy

AU - Kiviniemi, Timo P.

AU - Lashkul, Serguey

AU - Leerink, Susan

N1 - 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.

PY - 2022/6

Y1 - 2022/6

N2 - 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.

AB - 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.

KW - gyrokinetic simulation

KW - neoclassical plasma

KW - tokamak plasma

KW - turbulence

UR - https://www.scopus.com/pages/publications/85126266849

U2 - 10.1002/ctpp.202100187

DO - 10.1002/ctpp.202100187

M3 - Article

AN - SCOPUS:85126266849

SN - 0863-1042

VL - 62

JO - Contributions to Plasma Physics

JF - Contributions to Plasma Physics

IS - 5-6

M1 - e202100187

ER -

Revisiting the improved core confinement simulations for FT-2 tokamak

Abstrakti

Rahoitus

YK:n kestävän kehityksen tavoitteet

Pääsy asiakirjaan

Muut tiedostot ja linkit

Sormenjälki

Projektit

MoPEF: Molecules and Photons in the edge of fusion plasmas

-: Turbulentti kuljetus fuusioplasmassa

-: Syklokineettinen reunaturbulenssi tokamak-plasmassa

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