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Effect of poloidal asymmetry on the impurity density profile in tokamak plasmas

Tünde Fülöp (Institutionen för teknisk fysik, Nukleär teknik) ; Sara Moradi (Institutionen för teknisk fysik, Nukleär teknik)
Physics of plasmas (1070-664X). Vol. 18 (2011), 3, p. 030703.
[Artikel, refereegranskad vetenskaplig]

The effect of poloidal asymmetry of impurities on impurity transport driven by electrostatic turbulence in tokamak plasmas is analyzed. It is found that if the density of the impurity ions is poloidally asymmetric then the zero-flux impurity density gradient is significantly reduced and even a sign change in the impurity flux may occur if the asymmetry is sufficiently large. This effect is most effective in low shear plasmas with the impurity density peaking on the inboard side and may be a contributing factor to the observed outward convection of impurities in the presence of radio frequency heating.



Denna post skapades 2011-03-30. Senast ändrad 2015-07-08.
CPL Pubid: 138421

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Nukleär teknik (2006-2015)

Ämnesområden

Hållbar utveckling
Plasmafysik
Fusion
Plasmafysik med fusion

Chalmers infrastruktur