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Numerical Study of the Axisymmetric Ideal MHD Stability of EXTRAP

Michal Benda (Institutionen för elektromagnetisk fältteori)
Göteborg : Chalmers University of Technology, 1993. ISBN: 91-7032-799-8.
[Doktorsavhandling]

A numerical study of the free-boundary axisymmetric (n=0) ideal magnetohydrodynamical (MHD) motions of the EXTRAP device is presented. The dependence of stability on current profiles in the plasma and currents in the external conductors is investigated. Results are shown for linear growth-rates and nonlinear saturation amplitudes and their dependence on plasma radius as well as on the conducting shell radius.

A method combined of two different algorithms has been developed and tested. The interior region of the plasma is simulated by means of a Lagrangian Finite Element Method (FEM) for ideal magnetohydrodynamics. The method is based on a nonlinear variational principle for the Lagrangian description of ideal MHD. The Boundary Element Method (BEM) is used together with the Lagrangian FEM to simulate nonlinear motion of an ideal MHD plasma behaviour in a vacuum region under the influence of external magnetic fields.



Denna post skapades 2006-09-19. Senast ändrad 2013-09-25.
CPL Pubid: 1468

 

Institutioner (Chalmers)

Institutionen för elektromagnetisk fältteori (1970-1998)

Ämnesområden

Elektroteknik och elektronik

Chalmers infrastruktur

Ingår i serie

Technical report - School of Electrical and Computer Engineering, Chalmers University of Technology, Göteborg, Sweden 241


Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie 926