Speaker
Dr
Raffi Nazikian
(Princeton Plasma Physics Laboratory)
Description
ELM suppression with 3D magnetic perturbations (MPs) is obtained for the first time in low
collisionality ASDEX Upgrade (AUG) plasmas following shape-matching experiments on DIII-D.
These experiments demonstrate the importance of low pedestal collisionality and strong shaping to
access ELM suppression, and reveal a remarkable similarity in the alignment of the ExB rotation profiles to
edge rational surfaces for the two machines, relevant to models of ELM suppression based on
resonant field penetration. The experiments also demonstrate the weak role played by the impurity
species and main ion dilution in affecting the onset conditions for ELM suppression, strongly
supporting a common physics basis for ELM suppression at ITER relevant collisionality in metal and
carbon wall experiments, based on resonant magnetic field effects at the top of the pedestal.
| Country or International Organization | USA |
|---|---|
| Paper Number | PD/1-1 |
Primary author
Dr
Raffi Nazikian
(Princeton Plasma Physics Laboratory)
Co-authors
Dr
Andrew Kirk
(Culham Centre for Fusion Energy)
Mr
B.A. Grierson
(Princeton Plasma Physics Laboratory)
Dr
Carlos Paz-Soldan
(General Atomics)
Dr
Dmitri Orlov
(University of California San Diego)
Dr
Matthias Willensdorfer
(IPP Garching)
Dr
Rachael McDermott
(Max Planck Institut für Plasmaphysik)
Dr
Todd E. Evans
(General Atomics)
Dr
Wolfgang Suttrop
(Max-Planck-Institut für Plasmaphysik)
