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US 7,663,327 B2Granted
Non-axisymmetric periodic permanent magnet focusing system
AssigneeMassachusetts Institute of Technology
InventorsRonak J. Bhatt, Chiping Chen, Jing Zhou, Alexey Radovinsky
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Abstract
A permanent magnet focusing system includes an electron gun that provides an electron ribbon beam having an elliptical shape. A plurality of permanent magnets provide transport for the electron ribbon beam. The permanent magnets produce a non-axisymmetric periodic permanent magnet (PPM) focusing field to allow the electron ribbon beam to be transported in the permanent magnet focusing system.
Claims21
A permanent magnet focusing system comprising:
- an electron gun that provides an electron ribbon beam having an elliptical shape;
- and
- a plurality of permanent magnets that provide transport for said electron ribbon beam, said permanent magnets producing a non-axisymmetric periodic permanent magnet (PPM) focusing field to allow said electron ribbon beam to be transported in said permanent magnet focusing system.
A ribbon beam amplifier comprising:
- an electron gun that provides an electron ribbon beam having an elliptical shape;
- and
- a plurality of permanent magnets that provide transport for said electron ribbon beam, said permanent magnets producing a non-axisymmetric periodic permanent magnet (PPM) focusing field to allow said electron ribbon beam to be transported in said ribbon beam amplifier.
A method of forming a ribbon beam amplifier comprising:
- providing an electron gun that provides an electron ribbon beam having an elliptical shape;
- and
- forming a plurality of permanent magnets that provide transport for said electron ribbon beam, said permanent magnets producing a non-axisymmetric periodic permanent magnet (PPM) focusing field to allow said electron ribbon beam to be transported in said ribbon beam amplifier.
Dependencies are inferred from the claim text.