Flexible helical-axis stellarator

Patent · Fri Jan 01 00:00:00 EST 1988

OSTI ID:866557

Harris, Jeffrey H ^[1]; Hender, Timothy C ^[2]; Carreras, Benjamin A ^[1]; Cantrell, Jack L ^[1]; Morris, Robert N ^[1]

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1. Oak Ridge, TN
2. Abingdon, GB2

An 1=1 helical winding which spirals about a conventional planar, circular central conductor of a helical-axis stellarator adds a significant degree of flexibility by making it possible to control the rotational transform profile and shear of the magnetic fields confining the plasma in a helical-axis stellarator. The toroidal central conductor links a plurality of toroidal field coils which are separately disposed to follow a helical path around the central conductor in phase with the helical path of the 1=1 winding. This coil configuration produces bean-shaped magnetic flux surfaces which rotate around the central circular conductor in the same manner as the toroidal field generating coils. The additional 1=1 winding provides flexible control of the magnetic field generated by the central conductor to prevent the formation of low-order resonances in the rotational transform profile which can produce break-up of the equilibrium magnetic surfaces. Further, this additional winding can deepen the magnetic well which together with the flexible control provides increased stability.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4735765
• OSTI ID: 866557
• Country of Publication: United States
• Language: English

Related Subjects

flexible
helical-axis
stellarator
helical
winding
spirals
conventional
planar
circular
central
conductor
adds
significant
degree
flexibility
control
rotational
transform
profile
shear
magnetic
fields
confining
plasma
toroidal
links
plurality
field
coils
separately
disposed
follow
path
phase
coil
configuration
produces
bean-shaped
flux
surfaces
rotate
manner
generating
additional
provides
generated
prevent
formation
low-order
resonances
produce
break-up
equilibrium
deepen
increased
stability
provides increased
field generating
central conductor
field coils
magnetic flux
magnetic field
magnetic fields
toroidal field
field coil
field generated
axis stellarator
central circular
rotational transform
configuration produces
increased stability
helical winding
flux surface
helical path
generating coils
helical-axis stellarator
coil configuration
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