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Stellarator bootstrap current and plasma flow velocity at low collisionality

Per Helander ; Felix Parra ; Sarah Newton (Institutionen för fysik, Subatomär fysik och plasmafysik (Chalmers))
Journal of Plasma Physics (0022-3778). Vol. 83 (2017),
[Artikel, refereegranskad vetenskaplig]

The bootstrap current and flow velocity of a low-collisionality stellarator plasma are calculated. As far as possible, the analysis is carried out in a uniform way across all low-collisionality regimes in general stellarator geometry, assuming only that the confinement is good enough that the plasma is approximately in local thermodynamic equilibrium. It is found that conventional expressions for the ion flow speed and bootstrap current in the low-collisionality limit are accurate only in the 1/nu -collisionality regime and need to be modified in the root-nu-regime. The correction due to finite collisionality is also discussed and is found to scale as nu^2/5

Nyckelord: fusion plasma, plasma confinement, plasma flows

Denna post skapades 2017-01-11. Senast ändrad 2017-10-02.
CPL Pubid: 246760


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Institutioner (Chalmers)

Institutionen för fysik, Subatomär fysik och plasmafysik (Chalmers)


Plasmafysik med fusion

Chalmers infrastruktur