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U.S. Department of Energy
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ORNL helical-axis stellarator studies

Conference ·
OSTI ID:6294081

The addition of an l = 1 helical winding to the Heliac central conductor adds a significant degree of flexibility to the configuration by making it possible to control the rotational transform and shear. Such control is essential for an experiment because the presence of low-m resonant surfaces in or near the plasma can cause break-up of the equilibrium magnetic surfaces. To further improve the equilibrium ..beta.. limits for low aspect ratio configurations, it is necessary to reduce the toroidal magnetic axis shift. The results indicate that an increase in aspect ratio and number of field periods is the most effective means of improvement.

Research Organization:
Oak Ridge National Lab., TN (USA)
DOE Contract Number:
AC05-84OR21400
OSTI ID:
6294081
Report Number(s):
CONF-8411121-3; ON: TI85003683
Country of Publication:
United States
Language:
English