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Study of collisionless TE and ITG modes in an ITER-like equilibrium

M. Ansar Mahmood (Institutionen för signaler och system, Biomedicinsk elektromagnetik) ; Jan Weiland (Institutionen för radio- och rymdvetenskap, Transportteori) ; Mikael Persson (Institutionen för signaler och system, Biomedicinsk elektromagnetik) ; Tariq Rafiq
Proceedings of the 35th EPS Conference on Plasma Physics, Hersonissos, Greece, 9-13 June, 2008, ECA Vol. 32F (2008), p. 4.024.
[Konferensbidrag, refereegranskat]

The linear stability of collisionless trapped electron (TE) and ion temperature gradient (ITG) modes is studied in an ITER-like magnetic field configuration. An advanced fluid model for ITG-TE mode [1] is used and an eigenvalue equation along a field line is derived using the ballooning mode formalism. The eigenvalue problem is solved numerically using a standard shooting technique and applying WKB type boundary conditions. The growth rates and real frequencies of the most unstable modes and their eigenfunctions are calculated. Effects of the magnetic shear, trapped electrons fraction, wavevector, temperature ratios, and temperature gradients on mode stability are discussed.

Nyckelord: Microinstabilities, tokamaks



Denna post skapades 2008-09-03. Senast ändrad 2016-08-15.
CPL Pubid: 73505

 

Institutioner (Chalmers)

Institutionen för signaler och system, Biomedicinsk elektromagnetik
Institutionen för radio- och rymdvetenskap, Transportteori (2005-2010)

Ämnesområden

Plasmafysik
Fusion

Chalmers infrastruktur