SWEDEN - GOE

DEPARTMENT OF ELECTROMAGNETICS
CHALMERS UNIVERSITY OF TECHNOLOGY

S-412 96 Göteborg

Telephone: +46 31 772 1577 (Switchboard University: 1000)
E-mail: elf(name initials)@elmagn.chalmers.se
URL:   http://www.elmagn.chalmers.se

Anderson, Dan
Anderson, Johan
Andersson, Fredrik
Bondeson, Anders
Dastgeer, Shahik
Fülöp, Tünde

Gregoratto, Demetrio
Holod, Igor
Jarmén, Anders
Lisak, Mietek
Liu, Yueqiang
Moestam, Robert

Nadeem, Muhammed
Nordman, Hans
Persson, Mikael
Rafiq, Tariq
Smith, Håkan
Weiland, Jan

Research activities:
Operational limits and stability of global modes:
This project aims at understanding and optimisation of the operational limits of tokamaks. Numerical stability calculations are made for global modes within ideal and resistive MHD, mainly using the codes CHEASE for equilibrium and MARS for stability. Current research focuses on increasing the beta limit of advanced tokamaks by wall stabilization and active feedback. In collaboration with control theorists we have developed design techniques for feedback systems for resistive wall modes. This work also involves collaboration with the ITER Naka team. More recent work studies the nonlinear evolution of neoclassical tearing modes by nonlinear 3D MHD simulation.

Plasma stability and transport:
This project is mainly directed towards a first principles understanding of tokamak transport. A transport model based on reactive drift modes has been developed and is used in both interpretative and predictive transport codes. The work is performed within the European ITER programme, in collaboration with JET and within the world-wide testing of transport models against the ITER database. Specific problem areas studied are: effects of pinch fluxes on energy and particle transport, dimensionless, scaling of transport with system size and enhanced confinement regimes. Studies are also made of two-fluid and kinetic effects on MHD-modes.

Physics of burning fusion plasmas:
This project is directed towards the physics of burning fusion plasmas in fusion reactors. Specific problem areas under consideration are (a) collective fast ion effects in tokamaks, e.g., chirping modes, ion cyclotron emission generated by fast ions, and channeling of alpha particle heating, (b) electron run-away, e.g., generation and suppression by synchrotron radiation and radial diffusion of electron avalanches, and (c) divertors and edge plasma physics including the transport of energy and particles. The work is made in collaboration with UKAEA Culham, CEA, Institute for Nuclear Research in Kiev, and MIT Plasma Science and Fusion Center in Cambridge, USA.

Stellarator Physics
The project aims at improving the understanding of transport in 3-dimensional stellarator experiments. In particular, studies are made of drift-waves in 3D geometries. The project is oriented in particular towards two stellarators, H-1NF in Canberra, Australia and Wendelstein 7-X in Greifswald, Germany.