Speaker
Dr
Laurent Chôné
(Aalto University)
Description
The tokamak boundary is of particular importance for magnetic fusion research. Indeed, it gathers several critical technological and scientific challenges that need addressed to achieve and sustain burning plasma regimes [1-5]. This includes plasma surface interaction with high fluence during long pulses, heat and particle transport and exhaust, the physics of edge transport barriers (ETB) formation in advanced scenarios, mitigation of edge-localised modes (ELM) and so forth.
Because the scrape-off layer (SOL) and confined plasma are interwoven through these phenomena, faithfully modelling the tokamak edge requires encompassing both regions. In this work, the 3D global full-f particle-in-cell gyrokinetic code ELMFIRE [6] is used to study the plasma edge of the FT-2 tokamak. Recent ELMFIRE developments have enabled full-torus simulations of FT-2 from the magnetic axis to the wall, including the SOL [7,8]. Here, we perform a validation of ELMFIRE SOL modelling and compare the numerical realisations to experimental measurements in FT-2. The simulation results are in turn analysed to provide further insight on the properties of the FT-2 SOL and the nature of the turbulence developing inside it.
[1] E. J. Doyle et al., Nucl. Fusion 47 (2007) S18
[2] A. Loarte et al., Nucl. Fusion 47 (2007) S203
[3] P. C. Stangeby, The Plasma Boundary of Magnetic Fusion Devices, IOP, 2000
[4] F. Wagner, Plasma Phys. Control. Fusion 49 (2007) B1
[5] F. Ryter et al., Nucl. Fusion 54 (2014) 083003
[6] J. A. Heikkinen et al., J. Comput. Phys. 227 (2008) 5582‒5609
[7] T. Korpilo et al., Contrib. Plasma Phys. 56 (2016) 549‒554
[8] L. Chôné et al., Contrib. Plasma Phys. to be published
Primary author
Dr
Laurent Chôné
(Aalto University)
Co-authors
Dr
Aleksey Gurchenko
(Ioffe Institute)
Prof.
Evgeniy Gusakov
(Ioffe Institute)
Mr
Paavo Niskala
(Aalto University)
Dr
Serguey Lashkul
(Ioffe Institute)
Dr
Susan Leerink
(Aalto University)
Dr
Timo Kiviniemi
(Aalto University)
