Mode trap for absorbing transverse modes of an accelerated electron beam

Patent · Fri Dec 31 23:00:00 EST 1993

OSTI ID:869335

Chojnacki, Eric P ^[1]

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1. Woodridge, IL

A mode trap to trap and absorb transverse modes formed by a beam in a linear accelerator includes a waveguide having a multiplicity of electrically conductive (preferably copper) irises and rings, each iris and ring including an aperture, and the irises and rings being stacked in a side-by-side, alternating fashion such that the apertures of the irises and rings are concentrically aligned. An absorbing material layer such as a dielectric is embedded in each iris and ring, and this absorbing material layer encircles, but is circumferentially spaced from its respective aperture. Each iris and ring includes a plurality of circumferentially spaced slots around its aperture and extending radially out toward its absorbing material layer.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 5317234
• OSTI ID: 869335
• Country of Publication: United States
• Language: English

Related Subjects

/315/333/
absorb
absorbing
absorbing material
accelerated
accelerated electron
accelerator
aligned
alternating
aperture
apertures
beam
circumferentially
circumferentially spaced
concentrically
conductive
copper
dielectric
electrically
electrically conductive
electron
electron beam
embedded
encircles
extending
extending radial
extending radially
fashion
formed
including
iris
irises
layer
linear
linear accelerator
material
material layer
mode
mode trap
modes
multiplicity
plurality
preferably
radially
respective
rings
side-by-side
slots
sorbing material
spaced
spaced slots
stacked
transverse
transverse mode
transverse modes
trap
waveguide