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Scaling of the Plasma Rotation Needed for Stabilizing the n = 1 Resistive Wall Mode (Ideal Kink) in the DIII D Tokamak

R.J. La Haye ; Anders Bondeson (Institutionen för elektromagnetik, Elektromagnetiska beräkningar) ; M.S. Chu ; A.M. Garofalo ; Yueqiang Liu (Institutionen för elektromagnetik, Elektromagnetiska beräkningar) ; G.A. Navratil ; M. Okabayashi ; H. Reimerdes ; E.J. Strait
Nuclear Fusion (ISSN 0029-5515). Vol. 44 (2004), p. 1197.
[Artikel, refereegranskad vetenskaplig]

Experiments in the DIII-D tokamak show that the n = 1 ideal kink can be stabilized by a resistive wall if the plasma is rotating fast enough. A database of the onset of the n = 1 resistive wall mode as a function of the equilibrium toroidal magnetic field, the plasma density and the toroidal rotation has been assembled for plasmas with beta between the theoretically predicted no wall and ideal wall stability limits. The critical rotation frequency is found to scale as the inverse of the Alfvén time with ? ?A 0.02 (evaluated at the q = 2 surface at ? 0.6) or ? ?S 0.7, where ?S is the sound time. The dependence of ? ? A or ? ?S on ?N/?N,no wall from 1?2 is weak and suggests the plasmas are in the 'intermediate dissipation' regime.

Nyckelord: Resistive Wall Mode, Critical Rotation, Stabilization,



Denna post skapades 2006-09-25. Senast ändrad 2013-07-03.
CPL Pubid: 2482

 

Institutioner (Chalmers)

Institutionen för elektromagnetik, Elektromagnetiska beräkningar (1900-2004)

Ämnesområden

Fysik

Chalmers infrastruktur