Gyrokinetic particle simulation for thermonuclear plasma turbulence studies in magnetic confinement

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School of Science | Doctoral thesis (article-based) | Defence date: 2013-04-19
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Authors

Date

2013

Department

Teknillisen fysiikan laitos
Department of Applied Physics

Major/Subject

Mcode

Degree programme

Language

en

Pages

103 + app. 80

Series

Aalto University publication series DOCTORAL DISSERTATIONS, 56/2013

Abstract

Thermal transport in a magnetised plasma is believed to be substantially enhanced due to turbulence. The ELMFIRE code has been developed for tokamak plasma turbulence studies in high temperature magnetized plasmas. ELMFIRE calculates the evolution of the Boltzmann equation in a magnetized plasma, including long scale interactions between particles calculated through field equations. In this work we concentrate on benchmarking the ELMFIRE against published results from other turbulence codes, for instabilities (linear benchmarking) and turbulent heat flux (non-linear benchmarking). We investigate the effects of spatial and velocity-space resolution in the benchmarking cases.

Lämmön kuljetus magneettisesti koossapidetyssä plasmassa havaittiin odotettua suuremmaksi turbulenssin vuoksi. Simulointimalli nimeltä ELMFIRE on kehitetty Aalto Yliopiston ja VTT:n yhteistyössä tokamakissa havaittavan tehostuneen lämmön kuljetuksen tutkimiseen. ELMFIREssa käytetty malli perustuu kaasujen kineettiseen teoriaan, jota hyödyntäen voidaan simuloida fuusioreaktorissa tapahtuvia ilmiöitä ilman, että joudutaan olettamaan termodynaaminen tasapainotila (jota ei tokamakissa saavuteta). Tutkimme tässä työssä ELMFIREn tuloksia kansainvälisessä kirjallisuudessa julkaistuihin tuloksiin, niin epävakaisuuksien kuin niistä syntyvän turbulenssin osalta.

Description

Supervising professor

Salomaa, Rainer, Prof., Aalto University, Department of Applied Physics, Finland

Thesis advisor

Heikkinen, Jukka, Dr., VTT, Finland

Keywords

fusion, plasma, transport, numerical simulation, FT-2 simulation, ELMFIRE code, plasma turbulence, tokamak plasma, gyrokinetic particle simulation, plasma instabilities, turbulent heat flux, thermal transport

Other note

Parts

  • [Publication 1]: Heikkinen, Jukka.; Janhunen, Salomon; Kiviniemi, Timo; Ogando, Francisco. Full f gyrokinetic method for particle simulation of tokamak transport. Journal of Computational Physics, 227, pp.5582-5609, February 2008.
  • [Publication 2]: Janhunen, Salomon; Ogando, Francisco; Heikkinen, Jukka; Kiviniemi, Timo; Leerink. Collisional dynamics of Er in turbulent plasmas in toroidal geometry. Nuclear Fusion, 47 875-879, July 2007.
  • [Publication 3]: Falchetto, Gloria; Scott, Bruce; Angelino, Paolo; Bottino, Andreas; Dannert,Tillman; Grandgirard, Virginie; Janhunen, Salomon; Jenko, Frank; Jolliet, Sebastien; Kendl, Alex; McMillan, Ben; Naulin, Volker; Nielsen, A H; Ottaviani, Maurizio; Peeters, Arthur. The European turbulence code benchmarking effort: turbulence driven by thermal gradients in magnetically confined plasmas. Plasma Physics and Controlled Fusion, 50 1-12, 2008.
  • [Publication 4]: Henriksson, Svante; Janhunen, Salomon; Kiviniemi, Timo; Heikkinen, Jukka. Global spectral investigation of plasma turbulence in gyrokinetic simulations. Physics of Plasmas, 7 072303–7, 2006.
  • [Publication 5]: Janhunen, Salomon; Kiviniemi, Timo; Heikkinen, Jukka; Korpilo, Tuomas; Leerink, Susan; Nora, Markus; Ogando, Francisco. Recent Advances in Gyrokinetic Full-f Particle Simulation of Medium Sized Tokamaks with ELMFIRE. Contributions to Plasma Physics, 50 252-255, 2010.
  • [Publication 6]: Heikkinen, Jukka; Korpilo, Tuomas; Janhunen, Salomon; Kiviniemi, Timo; Leerink, Susan; and Ogando, Francisco. Interpolation for momentum conservation in 3D toroidal gyrokinetic particle simulation of plasmas. Computer Physics Communications, 183 1719, 2012.
  • [Publication 7]: Leerink, Susan; Bulanin, Viktor; Gurchenko, Alexey; Gusakov, Evgeniy; Heikkinen, Jukka; Janhunen, Salomon; Altukhov, Alexey; Esipov, L; Kantor, M. Yu; Kiviniemi, Timo; Korpilo, Tuomas; Kuprienko, Dimitry; Lashkul, Serguey; Petrov, A.. Multi-scale investigations of drift wave turbulence and plasma flows: Measurements and full f gyrokinetic simulations. Physical Review Letters, 109 165001, 2012.

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https://urn.fi/URN:ISBN:978-952-60-5099-7

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[diss] Perustieteiden korkeakoulu / SCI