Speaker
Claus-Peter Kasemann
(Max Planck Institute for Plasma Physics)
Description
One of the biggest challenges for a fusion reactor with magnetic confinement is the controlled removal of the heating power. ASDEX Upgrade (AUG) is the leading experiment in this area and investigates integrated solutions that combine high heating power and wall materials suitable for reactors.
A measure of the challenge to remove the power in the divertor region is given by the normalized output power Psep/R. In AUG it is already 10 MW/m for 2 s, 2/3 of the value expected for a reactor and a world leading achievement. To go to even higher values for longer times, an extension of the heating power and power supply systems is required. The AUG program combines the rise of the central heating power by ECRH, ICRF and NBI with an enhancement and optimization of the power supply installation. With these measures Psep/R will be increased up to 15 MW/m, in the range of the values intended for ITER and DEMO, for more than 5 s.
The program is split into 5 topics:
- Enhancement of the ECRH to 8 MW / 10 s.
- Installation of 2 3-strap antennas followed by an additional 3rdrd generator feeding the new antennas.
- Strengthening of NBI injector 1 by modern RF-sources and possibly later increase of the accelerating voltage.
- Upgrade of the power supply for ohmic heating by a new high current converter.
- Installation of a 90 MVAr static reactive current compensation for flywheel generator EZ4.
The paper describes the motivation and program to increase the heating and pulse power capabilities of AUG towards achieving a stationary behavior of the current profile and wall-particle-inventory under reactor relevant conditions. We provide more detail on the envisioned 5 steps, the present state and findings, and future exploitation.
Co-authors
Arne Kallenbach
(Max Planck Institute for Plasma Physics, Boltzmannstraße 2, 85748 Garching, Germany)
Christian Hopf
(Max Planck Institute for Plasma Physics, Boltzmannstraße 2, 85748 Garching, Germany)
Claus-Peter Kasemann
(Max Planck Institute for Plasma Physics, Boltzmannstraße 2, 85748 Garching, Germany)
Igor Goldstein
(Max Planck Institute for Plasma Physics, Boltzmannstraße 2, 85748 Garching, Germany)
Jean-Marie Noterdaeme
(Max Planck Institute for Plasma Physics, Boltzmannstraße 2, 85748 Garching, Germany)
Jorg Stober
(Max Planck Institute for Plasma Physics, Boltzmannstraße 2, 85748 Garching, Germany)
Michael Rott
(Max Planck Institute for Plasma Physics, Boltzmannstraße 2, 85748 Garching, Germany)
and the ASDEX Upgrade Team
(Max Planck Institute for Plasma Physics, Boltzmannstraße 2, 85748 Garching, Germany)
