UKAEA Journals

Showing 1 - 3 of 3 Journals Results
2019
UKAEA-CCFE-PR(20)05
"Toroidal modelling of core plasma flow damping by RMP fields in hybrid discharge on ASDEX Upgrade"

N. Zhang Y. Q. Liu P. Piovesan V. Igochine D. L. Yu S. Wang G. Q. Dong G. Z. Hao G. L. Xia W. J. Chen L. Liu J. Q. Li X. Bai

Resistive plasma response to the n = 1 (n is the toroidal mode number) RMP field is systematically investigated for a high-beta hybrid discharge on ASDEX Upgrade. Both linear and quasi-linear response are modelled using the MARS-F and MARS-Q codes, respectively. Linear response computations show a large internal kink response when the plasma centra…

Preprint Published
2017
CCFE-PR(17)11
"Helical flow in RFX-mod tokamak plasmas"

L. Piron B. Zaniol D. Bonfiglio L. Carraro A. Kirk L. Marrelli R. Martin C. Piron P. Piovesan M. Zuin

This work presents the first evidence of helical flow in RFX-mod q(a) < 2 tokamak plasmas. The flow pattern is characterized by the presence of convective cells with m = 1 and n = 1 periodicity in the poloidal and toroidal direction, respectively. A similar helical flow deformation has been observed in the same device when operatedfas a Reversed…

Preprint Published
2016
CCFE-PR(16)07
"Toroidal Modelling of RMP Response in ASDEX Upgrade: Coil Phase Scan, q95 Dependence, and Toroidal Torques"

Y. Liu D. Ryan A. Kirk L. Li W. Suttrop M. Dunne R. Fischer J.C. Fuchs B. Kurzan P. Piovesan M. Willensdorfer The ASDEX Upgrade team The EUROfusion MST1 team

The plasma response to the vacuum resonant magnetic perturbation (RMP) fields, produced by the ELM control coils in ASDEX Upgrade experiments, is computationally modelled using the MARS-F/K codes [Liu Y.Q. et al 2000 Phys. Plasmas 7 3681; Liu Y.Q. et al 2008 Phys. Plasmas 15 112503]. A systematic investigation is carried out, considering various pl…

Preprint Published