High Aspect Ratio Stellarator Gallery

Advanced Toroidal Facility (ATF): Oak Ridge National Laboratory at Oak Ridge, Tennessee

ATF is a 12 field period torsatron (no longer operating) which was constructed to test access to second stability. Shown below is an outer flux surface which is colored according to the strength of the magnetic field with magenta corresponding to high field and light blue representing low field regions.

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Wendelstein 7-AS: IPP (Institute for Plasma Physics) EURATOM Association at Garching, Germany

Wendelstein 7-AS is an operating 5 field period stellarator experiment. Here an outer flux surface is shown with magenta representing high magnetic field and dark blue low field.

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Wendelstein 7-X: IPP (Institute for Plasma Physics) EURATOM Association at Griefswald, Germany

Wendelstein 7-X is a stellarator which is planned to be operational in Griefswald, Germany in mid-2004. It will be the first large scale transport optimized stellarator experiment in the world and will have mean major and minor radii of 5.5 meters and 0.53 meters, respectively; the average magnetic field will be 3 Tesla. In the picture below both the modular, nonplanar magetic field coils (50 coils) and an outer magnetic surface are shown. The coloration on the magnetic surface varies from red-yellow at high magnetic fields to blue-magenta at low magnetic fields.

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Heliotron E: Kyoto University at Kyoto, JAPAN

Heliotron E is a 19 field period stellarator. Shown here is an outer magnetic flux surface colored proportional to the magnetic field strength. Magenta regions are high field and dark blue corresponds to low field.

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