Reduction of multipacting by means of spatially varying magnetization
AssigneeCern - European Organization for Nuclear Research
InventorFritz Caspers
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Abstract
The present invention discloses an apparatus comprising an enclosure (10) suitable for forming a vacuum therein and means for at least partially suppressing the multipacting effect when a RF or microwave electromagnetic field is generated in said vacuum. In the apparatus, the means for at least partially suppressing the multipacting effect comprises means (12) for passively generating a locally varying magnetic field (16) in the vicinity of at least a portion of the inner surface of said enclosure.
Claims33
1-21. (canceled)
An apparatus comprising:
- an enclosure suitable for forming a vacuum interior to an inner surface of the enclosure;
- and
- means for at least partially suppressing a multipacting effect when a RF or microwave electromagnetic field is generated in said vacuum, characterized in that said means for at least partially suppressing the multipacting effect comprises means for passively generating a locally varying magnetic field in the vicinity of at least a portion of the inner surface of said enclosure.
A method of forming an apparatus in which a multipacting effect is at least partially suppressed, comprising the steps of:
- providing an enclosure that can be evacuated to a vacuum, and
- providing means for passively generating a locally varying magnetic field in the vicinity of at least a portion of the inner surface of said enclosure,
- wherein said step of providing means for passively generating a locally varying magnetic field comprises a step of providing a ferromagnetic layer in the vicinity of the inner surface of said enclosure and magnetizing the ferromagnetic layer according to a locally varying pattern.
A method of at least partially suppressing a multipacting effect in a vacuum enclosure in which an RF or microwave electromagnetic field is generated, characterized in that a locally varying magnetic field is provided in the vicinity of at least a portion of the inner surface of said enclosure.
Dependencies are inferred from the claim text.