ASCOT orbit-following simulations of ion cyclotron heating with synthetic fast ion loss diagnostic: a first application to ASDEX Upgrade

Seppo Sipila; Jari Varje; Thomas Johnson; Roberto Bilato; Joaquin Galdon-Quiroga; Antti Snicker; Taina Kurki-Suonio; Lucia Sanchis; Davide Silvagni; Javier Gonzalez-Martin; ASDEX Upgrade Team; EUROfusion MST1 Team

doi:10.1088/1741-4326/ac0e71

ASCOT orbit-following simulations of ion cyclotron heating with synthetic fast ion loss diagnostic: a first application to ASDEX Upgrade

Seppo Sipila^*, Jari Varje, Thomas Johnson, Roberto Bilato, Joaquin Galdon-Quiroga, Antti Snicker, Taina Kurki-Suonio, Lucia Sanchis, Davide Silvagni, Javier Gonzalez-Martin, ASDEX Upgrade Team, EUROfusion MST1 Team

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

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Abstract

The orbit-following Monte Carlo code ASCOT interfaced with the radiofrequency Monte Carlo library RFOF can simulate radiofrequency heating of ion populations using wave solutions from full-wave solvers such as TORIC. It is applied to the fundamental mode ion cyclotron resonant heating of hydrogen and 2nd harmonic frequency heating of neutral beam injected deuterium in ASDEX Upgrade discharge #33147 to validate the model against fast ion loss detector (FILD) measurements. In addition, for FILD signal simulations requiring enhanced resolution or scanning the effect of various perturbations such as magnetohydrodynamic phenomena near the plasma edge, a two-stage simulation scheme is presented where the fast ion population is first created by a full ASCOT-RFOF ion cyclotron heating simulation, and the resulting distribution is then used as an input to ASCOT's distribution-sampling marker source module for more efficient simulation of the ICRH ion wall load and FILD signal. A satisfactory agreement with the experimentally observed FILD signal is found.

Original language	English
Article number	086026
Number of pages	15
Journal	Nuclear Fusion
Volume	61
Issue number	8
DOIs	https://doi.org/10.1088/1741-4326/ac0e71
Publication status	Published - Aug 2021
MoE publication type	A1 Journal article-refereed

Keywords

orbit-following
Monte Carlo
ASCOT
ASDEX Upgrade
ion cyclotron resonance heating
FILD
wall load
MODEL

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10.1088/1741-4326/ac0e71

SCI_Sipilä_ASCOT orbit-following simulations.acceptedAccepted author manuscript, 1.38 MBLicence: CC BY-NC-ND

-: Fast and furious of fusion plasmas
Snicker, A. (Principal investigator), Sanchis, L. (Project Member), Kontula, J. (Project Member), Äkäslompolo, S. (Project Member) & Ollus, P. (Project Member)
01/09/2019 → 31/12/2022
Project: Academy of Finland: Other research funding
Snicker Antti AT-palkka: Fast and furious of fusion plasmas
Snicker, A. (Principal investigator)
01/09/2019 → 30/04/2023
Project: Academy of Finland: Other research funding
also: Fusion with a twist: Racing particles (also) in W7-X stellarator
Särkimäki, K. (Project Member), Kurki-Suonio, T. (Principal investigator), Kontula, J. (Project Member), Ollus, P. (Project Member), Varje, J. (Project Member), Sanchis, L. (Project Member) & Ikäheimo, A. (Project Member)
01/09/2016 → 31/08/2020
Project: Academy of Finland: Other research funding

Cite this

Sipila, S., Varje, J., Johnson, T., Bilato, R., Galdon-Quiroga, J., Snicker, A., Kurki-Suonio, T., Sanchis, L., Silvagni, D., Gonzalez-Martin, J., ASDEX Upgrade Team, & EUROfusion MST1 Team (2021). ASCOT orbit-following simulations of ion cyclotron heating with synthetic fast ion loss diagnostic: a first application to ASDEX Upgrade. Nuclear Fusion, 61(8), Article 086026. https://doi.org/10.1088/1741-4326/ac0e71

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title = "ASCOT orbit-following simulations of ion cyclotron heating with synthetic fast ion loss diagnostic: a first application to ASDEX Upgrade",

abstract = "The orbit-following Monte Carlo code ASCOT interfaced with the radiofrequency Monte Carlo library RFOF can simulate radiofrequency heating of ion populations using wave solutions from full-wave solvers such as TORIC. It is applied to the fundamental mode ion cyclotron resonant heating of hydrogen and 2nd harmonic frequency heating of neutral beam injected deuterium in ASDEX Upgrade discharge #33147 to validate the model against fast ion loss detector (FILD) measurements. In addition, for FILD signal simulations requiring enhanced resolution or scanning the effect of various perturbations such as magnetohydrodynamic phenomena near the plasma edge, a two-stage simulation scheme is presented where the fast ion population is first created by a full ASCOT-RFOF ion cyclotron heating simulation, and the resulting distribution is then used as an input to ASCOT's distribution-sampling marker source module for more efficient simulation of the ICRH ion wall load and FILD signal. A satisfactory agreement with the experimentally observed FILD signal is found.",

keywords = "orbit-following, Monte Carlo, ASCOT, ASDEX Upgrade, ion cyclotron resonance heating, FILD, wall load, MODEL",

author = "Seppo Sipila and Jari Varje and Thomas Johnson and Roberto Bilato and Joaquin Galdon-Quiroga and Antti Snicker and Taina Kurki-Suonio and Lucia Sanchis and Davide Silvagni and Javier Gonzalez-Martin and {ASDEX Upgrade Team} and {EUROfusion MST1 Team}",

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

year = "2021",

month = aug,

doi = "10.1088/1741-4326/ac0e71",

language = "English",

volume = "61",

journal = "Nuclear Fusion",

issn = "0029-5515",

publisher = "Institute of Physics Publishing ",

number = "8",

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Sipila, S, Varje, J, Johnson, T, Bilato, R, Galdon-Quiroga, J, Snicker, A, Kurki-Suonio, T, Sanchis, L, Silvagni, D, Gonzalez-Martin, J, ASDEX Upgrade Team & EUROfusion MST1 Team 2021, 'ASCOT orbit-following simulations of ion cyclotron heating with synthetic fast ion loss diagnostic: a first application to ASDEX Upgrade', Nuclear Fusion, vol. 61, no. 8, 086026. https://doi.org/10.1088/1741-4326/ac0e71

TY - JOUR

T1 - ASCOT orbit-following simulations of ion cyclotron heating with synthetic fast ion loss diagnostic

T2 - a first application to ASDEX Upgrade

AU - Sipila, Seppo

AU - Varje, Jari

AU - Johnson, Thomas

AU - Bilato, Roberto

AU - Galdon-Quiroga, Joaquin

AU - Snicker, Antti

AU - Kurki-Suonio, Taina

AU - Sanchis, Lucia

AU - Silvagni, Davide

AU - Gonzalez-Martin, Javier

AU - ASDEX Upgrade Team

AU - EUROfusion MST1 Team

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

PY - 2021/8

Y1 - 2021/8

N2 - The orbit-following Monte Carlo code ASCOT interfaced with the radiofrequency Monte Carlo library RFOF can simulate radiofrequency heating of ion populations using wave solutions from full-wave solvers such as TORIC. It is applied to the fundamental mode ion cyclotron resonant heating of hydrogen and 2nd harmonic frequency heating of neutral beam injected deuterium in ASDEX Upgrade discharge #33147 to validate the model against fast ion loss detector (FILD) measurements. In addition, for FILD signal simulations requiring enhanced resolution or scanning the effect of various perturbations such as magnetohydrodynamic phenomena near the plasma edge, a two-stage simulation scheme is presented where the fast ion population is first created by a full ASCOT-RFOF ion cyclotron heating simulation, and the resulting distribution is then used as an input to ASCOT's distribution-sampling marker source module for more efficient simulation of the ICRH ion wall load and FILD signal. A satisfactory agreement with the experimentally observed FILD signal is found.

AB - The orbit-following Monte Carlo code ASCOT interfaced with the radiofrequency Monte Carlo library RFOF can simulate radiofrequency heating of ion populations using wave solutions from full-wave solvers such as TORIC. It is applied to the fundamental mode ion cyclotron resonant heating of hydrogen and 2nd harmonic frequency heating of neutral beam injected deuterium in ASDEX Upgrade discharge #33147 to validate the model against fast ion loss detector (FILD) measurements. In addition, for FILD signal simulations requiring enhanced resolution or scanning the effect of various perturbations such as magnetohydrodynamic phenomena near the plasma edge, a two-stage simulation scheme is presented where the fast ion population is first created by a full ASCOT-RFOF ion cyclotron heating simulation, and the resulting distribution is then used as an input to ASCOT's distribution-sampling marker source module for more efficient simulation of the ICRH ion wall load and FILD signal. A satisfactory agreement with the experimentally observed FILD signal is found.

KW - orbit-following

KW - Monte Carlo

KW - ASCOT

KW - ASDEX Upgrade

KW - ion cyclotron resonance heating

KW - FILD

KW - wall load

KW - MODEL

U2 - 10.1088/1741-4326/ac0e71

DO - 10.1088/1741-4326/ac0e71

M3 - Article

SN - 0029-5515

VL - 61

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 8

M1 - 086026

ER -

ASCOT orbit-following simulations of ion cyclotron heating with synthetic fast ion loss diagnostic: a first application to ASDEX Upgrade

Abstract

Keywords

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Projects

-: Fast and furious of fusion plasmas

Snicker Antti AT-palkka: Fast and furious of fusion plasmas

also: Fusion with a twist: Racing particles (also) in W7-X stellarator

Cite this