Speaker
Dr
Daniel López-Bruna
(EsLNF)
Description
The relaxation of the constraint of periodicity imposed by the external confining magnetic field coils in a nominally 4-field period Helias Advanced Stellarator configuration produces weak periodicity-breaking deformations of the plasma. The corrugations are driven by the interaction of the pressure gradient with the magnetic field line curvature and correspond to saturated ideal magnetohydrodynamic interchanges with a mode structure dominated by nonresonant $m=1$, $n=\pm 1$ Fourier components. Very similar low order mode number oscillations are observed in the 4-field period TJ-II Heliac stellarator. The conditions of quasi-isodynamicity of the Helias reactor system investigated are not significantly altered by the periodicity-breaking distortions.
| Country or International Organization | Spain |
|---|---|
| Paper Number | TH/P5-28 |
Primary author
Dr
Wilfred Cooper
(ChEPFL)
Co-authors
Mr
Andreas Kleiner
(CHEPFL)
Dr
Daniel López-Bruna
(EsLNF)
Prof.
Francisco Castejón
(EsLNF)
Mr
Hamish Patten
(CHEPFL)
Dr
Jonathan M Faustin
(DEMPIPGRIF)
Dr
Jonathan P. Graves
(ChEPFL)
Dr
Madhusudan RAGHUNATHAN
(ChEpFL)
Dr
Maria Antonia Ochando
(EsLNF)
Mr
Samuel Lanthaler
(CHEPFL)
