Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Plasma Physics
Volume 67, Number 15
Monday–Friday, October 17–21, 2022; Spokane, Washington
Session UI01: Magnetic Confinement Fusion VI
2:00 PM–5:00 PM,
Thursday, October 20, 2022
Room: Ballroom 100 A
Chair: Sebastian De Pascuale, Oak Ridge National Lab
Abstract: UI01.00002 : On the formation and control of an X-point radiator in ASDEX Upgrade: SOLPS-ITER simulations and experiments
2:30 PM–3:00 PM
Presenter:
Ou Pan
(Max-Planck-Institut für Plasmaphysik)
Authors:
Ou Pan
(Max-Planck-Institut für Plasmaphysik)
Matthias Bernert
(Max-Planck-Institut für Plasmaphysik)
Tilmann Lunt
(Max-Planck-Institut für Plasmaphysik)
Marco Cavedon
(Università di Milano-Bicocca)
Marco Wischmeier
(Max-Planck-Institut für Plasmaphysik)
Ulrich Stroth
(Max-Planck-Institut für Plasmaphysik)
Collaboration:
The ASDEX Upgrade team
Neutrals at the X-point play an important role in generating an XPR. In simulations with artificial baffles for neutrals, it was demonstrated that an XPR cannot be achieved without neutrals penetrating the confined region. However, once a cold and recombining XPR is created, it persists even if the gas fueling rate is reduced by an order of magnitude, which is consistent with the prediction in the reduced model and the recent experimental observations in AUG. The redistribution of plasma density and radiation caused by drifts at the XPR was studied in experiments and simulations in favourable and unfavourable field directions.
The magnetic connection length and flux expansion also show an important influence on the XPR. With the same impurity seeding rate, the simulation with a higher toroidal field showed an XPR deeper inside the confined region. In simulations for DEMO [Zohm, NF, 2013] with a snowflake divertor, an XPR regime with a radiative power fraction larger than 90 % can be achieved at low upstream density (3×1019 m-3) and argon impurity density (∼1×1016 m-3) at the separatrix.
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700