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Title: Fast superconducting magnetic field switch

The superconducting magnetic switch or fast kicker magnet is employed with electron stream or a bunch of electrons to rapidly change the direction of flow of the electron stream or bunch of electrons. The apparatus employs a beam tube which is coated with a film of superconducting material. The tube is cooled to a temperature below the superconducting transition temperature and is subjected to a constant magnetic field which is produced by an external dc magnet. The magnetic field produced by the dc magnet is less than the critical field for the superconducting material, thus, creating a Meissner Effect condition. A controllable fast electromagnet is used to provide a magnetic field which supplements that of the dc magnet so that when the fast magnet is energized the combined magnetic field is now greater that the critical field and the superconducting material returns to its normal state allowing the magnetic field to penetrate the tube. This produces an internal field which effects the direction of motion and of the electron stream or electron bunch. The switch can also operate as a switching mechanism for charged particles.
 [1];  [2]
  1. (Mountain View, CA)
  2. (The Woodlands, TX)
Issue Date:
OSTI Identifier:
United States of America as represented by Department of Energy (Washington, DC) INEEL
Patent Number(s):
US 5543769
Contract Number:
Research Org:
Country of Publication:
United States
fast; superconducting; magnetic; field; switch; kicker; magnet; employed; electron; stream; bunch; electrons; rapidly; change; direction; flow; apparatus; employs; beam; tube; coated; film; material; cooled; temperature; below; transition; subjected; constant; produced; external; dc; critical; creating; meissner; effect; condition; controllable; electromagnet; provide; supplements; energized; combined; returns; normal; allowing; penetrate; produces; internal; effects; motion; operate; switching; mechanism; charged; particles; apparatus employs; electron stream; superconducting magnet; magnetic switch; conducting material; field produced; temperature below; charged particles; magnetic field; charged particle; superconducting material; superconducting magnetic; transition temperature; superconducting transition; electron bunch; critical field; constant magnetic; dc magnet; /335/313/

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