Diagnostic resonant cavity for a charged particle accelerator

Details Diagnostic resonant cavity for a charged particle accelerator Diagnostic resonant cavity for a charged particle accelerator

2007-10-02

2007-10-02

Dinh, Trinh (Department: 2821)

Radiant energy

With charged particle beam deflection or focussing

Magnetic lens

C250S306000, C315S005410

Reexamination Certificate

active

11286240

ABSTRACT:
Disclosed is a diagnostic resonant cavity for determining characteristics of a charged particle beam, such as an electron beam, produced in a charged particle accelerator. The cavity is based on resonant quadrupole-mode and higher order cavities. Enhanced shunt impedance in such cavities is obtained by the incorporation of a set of four or more electrically conductive rods extending inwardly from either one or both of the end walls of the cavity, so as to form capacitive gaps near the outer radius of the beam tube. For typical diagnostic cavity applications, a five-fold increase in shunt impedance can be obtained. In alternative embodiments the cavity may include either four or more opposing pairs of rods which extend coaxially toward one another from the opposite end walls of the cavity and are spaced from one another to form capacitative gaps; or the cavity may include a single set of individual rods that extend from one end wall to a point adjacent the opposing end wall.

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