Air core poloidal magnetic field system for a toroidal plasma producing device
- Clinton, TN
A poloidal magnetics system for a plasma producing device of toroidal configuration is provided that reduces both the total volt-seconds requirement and the magnitude of the field change at the toroidal field coils. The system utilizes an air core transformer wound between the toroidal field (TF) coils and the major axis outside the TF coils. Electric current in the primary windings of this transformer is distributed and the magnetic flux returned by air core windings wrapped outside the toroidal field coils. A shield winding that is closely coupled to the plasma carries a current equal and opposite to the plasma current. This winding provides the shielding function and in addition serves in a fashion similar to a driven conducting shell to provide the equilibrium vertical field for the plasma. The shield winding is in series with a power supply and a decoupling coil located outside the TF coil at the primary winding locations. The present invention requires much less energy than the usual air core transformer and is capable of substantially shielding the toroidal field coils from poloidal field flux.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
- DOE Contract Number:
- W-7405-ENG-26
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 4087322
- OSTI ID:
- 863066
- Country of Publication:
- United States
- Language:
- English
Similar Records
Steady-state inductive spheromak operation
Engineering design and construction of the S-1 spheromak coil systems
Related Subjects
addition
air
axis
capable
carries
change
closely
closely coupled
coil
coils
conducting
configuration
core
coupled
current
decoupling
device
distributed
driven
electric
electric current
energy
equal
equilibrium
fashion
field
field coil
field coils
field flux
flux
function
located
located outside
locations
magnetic
magnetic field
magnetic flux
magnetics
magnitude
major
major axis
opposite
outside
plasma
plasma current
plasma producing
poloidal
poloidal field
poloidal magnetic
power
power supply
primary
primary winding
primary windings
producing
producing device
provide
provided
provides
reduces
requirement
requires
returned
series
serves
shell
shield
shielding
similar
substantially
supply
tf
toroidal
toroidal configuration
toroidal field
toroidal plasma
total
total volt-second
transformer
utilizes
vertical
volt-seconds
winding
windings
wound
wrapped