Superconducting multi-cell trapped mode deflecting cavity

Patent metadata

Field	Value
Publication number	US-9786464-B2
Application number	US-201514813811-A
Country	US
Kind code	B2
Filing date	Jul 30, 2015
Priority date	Jul 30, 2014
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

A method and system for beam deflection. The method and system for beam deflection comprises a compact superconducting RF cavity further comprising a waveguide comprising an open ended resonator volume configured to operate as a trapped dipole mode; a plurality of cells configured to provide a high operating gradient; at least two pairs of protrusions configured for lowering surface electric and magnetic fields; and a main power coupler positioned to optimize necessary coupling for an operating mode and damping lower dipole modes simultaneously.

First claim

What is claimed is:

1. An RF cavity for beam deflection comprising:
a waveguide comprising an open ended resonator volume configured to operate as a trapped dipole mode;
a plurality of cells configured to provide a high operating gradient; and
at least two pairs of protrusions configured for lowering surface electric and magnetic fields.

2. The RF cavity of claim 1 wherein said RF cavity comprises a compact superconducting RF cavity.

3. The RF cavity of claim 1 further comprising high order monopole modes wherein said higher order monopole modes are damped by radiating to open beam line pipes.

4. The RF cavity of claim 1 further comprising:
a main power coupler positioned to optimize necessary coupling for an operating mode and damping lower dipole modes simultaneously.

5. The RF cavity of claim 1 wherein said at least two pairs of protrusions are elliptical shaped.

6. The RF cavity of claim 1 wherein said plurality of cells comprise electrodes formed in opposite walls of said resonator.

7. The RF cavity of claim 1 further corn pr ng a beam of particles configured to pass through said open ended resonator.

8. The RF cavity of claim 1 further comprising:
a broadband coaxial antenna configured as an EM-field pick-up probe.

9. The RF cavity of claim 1 further comprising a capacitive diaphragm configured to control a power coupling ratio associated with said RF cavity.

10. A system for beam deflection comprising:
a compact superconducting RF cavity further comprising:
a waveguide comprising an open ended resonator volume configured to operate as a trapped dipole mode;
a plurality of cells configured to provide a high operating gradient;
at least two pairs of protrusions configured for lowering surface electric and magnetic fields; and
a main power coupler positioned to optimize necessary coupling for an operating mode and damping lower dipole modes simultaneously.

11. The system of claim 10 further comprising high order monopole modes wherein said higher order monopole modes are damped by radiating to open beam line pipes.

12. The system of claim 10 wherein said at least two pairs of protrusions are elliptical shaped.

13. The system of claim 10 wherein said plurality of cells comprise electrodes formed in opposite walls of said resonator.

14. The system of, claim 10 further comprising:
a broadband coaxial antenna configured as an EM-field pick-up probe.

15. The system of claim 10 further comprising a capacitive diaphragm configured to control a power coupling ratio associated with said RF cavity.

Assignees

• Fermi Res Alliance Llc

Inventors

• Lunin Andrei
• Khabiboulline Timergali
• Gonin Ivan
• Yakovlev Vyacheslav
• Zholents Alexander

Classifications

• H01P5/082

  Transitions between hollow waveguides of different shape, e.g. between a rectangular and a circular waveguide · CPC title

• H01J23/20 Primary

  Cavity resonators; Adjustment or tuning thereof · CPC title

• H01P7/06

  Cavity resonators · CPC title

• H01P1/162

  absorbing spurious or unwanted modes of propagation · CPC title

• H01J25/78

  Tubes with electron stream modulated by deflection in a resonator · CPC title