Wendelstein 7-AS

The Wendelstein 7-AS stellarator was in operation at Garching from 1988 till 2002.

The Wendelstein 7-AS stellarator experiment was a member of the advanced stellarator generation developed at IPP. It subjected basic elements of stellarator optimisation to first tests. This served as basis for successor Wendelstein 7-X, at IPP’s Greifswald branch.

Wendelstein 7-AS differed from previous stellarators by virtue of a newly calculated, physically improved magnetic field that was likewise generated by novel, three-dimensionally distorted coils.


  • Investigation of a currentless plasma
  • Demonstration of the improved equilibrium and transport behaviour as a result of the enhanced magnetic field structure
  • Investigation of the plasma’s stability limits
  • Heating the plasma by different methods
  • Divertor studies

 Technical data

 Major plasma radius

2 metres
 Minor plasma radius 0.2 metres
 Magnetic field
2.5 - 3.5 tesla
 Number of coils
 Plasma volume 1 cubic metres
 Pulse length
3 seconds
 Plasma heating 5.6 megawatts
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