Simulating the effect of poloidal particle source on the bootstrap current and benchmarking to analytic estimates in tokamak edge pedestal

T. P. Kiviniemi; A. J. Virtanen; H. Systa; L. Chone; S. Leerink; E. Hirvijoki

doi:10.1088/1361-6587/ac2616

Simulating the effect of poloidal particle source on the bootstrap current and benchmarking to analytic estimates in tokamak edge pedestal

T. P. Kiviniemi^*, A. J. Virtanen, H. Systa, L. Chone, S. Leerink, E. Hirvijoki

^*Corresponding author for this work

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Abstract

The bootstrap current profile in the tokamak pedestal is studied numerically using the plasma code ELMFIRE in neoclassical simulations with Joint European Torus-like parameters. The effect of a poloidally localized atom source on the bootstrap current is investigated while assuming that the ionization takes place in the pedestal region. A clear effect of poloidal source location is found within one poloidal Larmor radius for thermal particles. For cold particles, this poloidal dependence largely disappears. Without source, the simulated bootstrap current is compared to two different analytical estimates and their accuracy is tested in terms of gradient scale lengths and collisionality.

Original language	English
Article number	125002
Number of pages	15
Journal	Plasma Physics and Controlled Fusion
Volume	63
Issue number	12
DOIs	https://doi.org/10.1088/1361-6587/ac2616
Publication status	Published - Dec 2021
MoE publication type	A1 Journal article-refereed

Keywords

particle-in-cell
tokamak
neoclassical
collisions
H-MODE
PLASMA
CONDUCTIVITY

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10.1088/1361-6587/ac2616

SCI_Kiviniemi_Simulating the effect of poloidal particle source on the bootstrap current and benchmarking to analytic estimates in tokamak edge pedestalAccepted author manuscript, 698 KBLicence: CC BY-NC-ND

-: Structure-preserving Algorithms for Kinetic Simulations of Plasmas
Hirvijoki, E. (Principal investigator)
01/09/2018 → 31/08/2023
Project: Academy of Finland: Other research funding
-: Cyclokinetic edge turbulence in tokamak plasmas
Kiviniemi, T. (Principal investigator)
01/09/2018 → 31/12/2022
Project: Academy of Finland: Other research funding

Cite this

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title = "Simulating the effect of poloidal particle source on the bootstrap current and benchmarking to analytic estimates in tokamak edge pedestal",

abstract = "The bootstrap current profile in the tokamak pedestal is studied numerically using the plasma code ELMFIRE in neoclassical simulations with Joint European Torus-like parameters. The effect of a poloidally localized atom source on the bootstrap current is investigated while assuming that the ionization takes place in the pedestal region. A clear effect of poloidal source location is found within one poloidal Larmor radius for thermal particles. For cold particles, this poloidal dependence largely disappears. Without source, the simulated bootstrap current is compared to two different analytical estimates and their accuracy is tested in terms of gradient scale lengths and collisionality.",

keywords = "particle-in-cell, tokamak, neoclassical, collisions, H-MODE, PLASMA, CONDUCTIVITY",

author = "Kiviniemi, {T. P.} and Virtanen, {A. J.} and H. Systa and L. Chone and S. Leerink and E. Hirvijoki",

note = "| openaire: EC/H2020/633053/EU//EUROfusion ",

year = "2021",

month = dec,

doi = "10.1088/1361-6587/ac2616",

language = "English",

volume = "63",

journal = "Plasma Physics and Controlled Fusion",

issn = "0741-3335",

publisher = "Institute of Physics Publishing",

number = "12",

}

TY - JOUR

T1 - Simulating the effect of poloidal particle source on the bootstrap current and benchmarking to analytic estimates in tokamak edge pedestal

AU - Kiviniemi, T. P.

AU - Virtanen, A. J.

AU - Systa, H.

AU - Chone, L.

AU - Leerink, S.

AU - Hirvijoki, E.

N1 - | openaire: EC/H2020/633053/EU//EUROfusion

PY - 2021/12

Y1 - 2021/12

N2 - The bootstrap current profile in the tokamak pedestal is studied numerically using the plasma code ELMFIRE in neoclassical simulations with Joint European Torus-like parameters. The effect of a poloidally localized atom source on the bootstrap current is investigated while assuming that the ionization takes place in the pedestal region. A clear effect of poloidal source location is found within one poloidal Larmor radius for thermal particles. For cold particles, this poloidal dependence largely disappears. Without source, the simulated bootstrap current is compared to two different analytical estimates and their accuracy is tested in terms of gradient scale lengths and collisionality.

AB - The bootstrap current profile in the tokamak pedestal is studied numerically using the plasma code ELMFIRE in neoclassical simulations with Joint European Torus-like parameters. The effect of a poloidally localized atom source on the bootstrap current is investigated while assuming that the ionization takes place in the pedestal region. A clear effect of poloidal source location is found within one poloidal Larmor radius for thermal particles. For cold particles, this poloidal dependence largely disappears. Without source, the simulated bootstrap current is compared to two different analytical estimates and their accuracy is tested in terms of gradient scale lengths and collisionality.

KW - particle-in-cell

KW - tokamak

KW - neoclassical

KW - collisions

KW - H-MODE

KW - PLASMA

KW - CONDUCTIVITY

U2 - 10.1088/1361-6587/ac2616

DO - 10.1088/1361-6587/ac2616

M3 - Article

SN - 0741-3335

VL - 63

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 12

M1 - 125002

ER -

Simulating the effect of poloidal particle source on the bootstrap current and benchmarking to analytic estimates in tokamak edge pedestal

Abstract

Keywords

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Projects

-: Structure-preserving Algorithms for Kinetic Simulations of Plasmas

-: Cyclokinetic edge turbulence in tokamak plasmas

Cite this