Accelerating structure

Patent metadata

Field	Value
Publication number	US-9237641-B2
Application number	US-201314024865-A
Country	US
Kind code	B2
Filing date	Sep 12, 2013
Priority date	Nov 7, 2012
Publication date	Jan 12, 2016
Grant date	Jan 12, 2016

Abstract

The present invention provides an accelerating structure capable of increasing a degree of vacuum at a middle part inside the accelerating structure while confining an alternating electric field to the inside. An accelerating structure 1 is formed of a plurality of annular discs 2 and 3 serially connected into a cylindrical shape. At least one of the discs 3 disposed at a middle part of the accelerating structure 1 includes: a choke structure formed by a choke filter 7 ; and a vacuum port 8 opened in an outer circumferential surface of the disc on an outer circumferential side radially outward from the choke structure, and the vacuum port 8 is connected to an external exhaust device.

First claim

The invention claimed is:

1. An accelerating structure formed of a plurality of annular discs serially connected into a cylindrical shape, wherein
at least one disc of the discs is disposed at a middle part of the accelerating structure and comprises:
a choke structure; and
a first through-hole that is formed, aside from a second through-hole formed on an axis of the one disc, in a radial direction of the one disc, from a portion closer to an outer circumferential surface of the one disc than the choke structure to the outer circumferential surface, and that penetrates-through the one disc itself, wherein
the first through-hole is connected to an external exhaust device at the outer circumferential surface.

2. An accelerating structure formed of discs serially connected into a cylindrical shape, wherein
each of a plurality of discs, among the discs, disposed at a middle part of the accelerating structure comprises:
a choke structure; and
a third through-hole that is formed aside from a second through-hole formed on an axis of the disc, in a direction of the axis, and that penetrates through the disc itself at a predetermined portion closer to an outer circumferential surface of the disc than the choke structure, wherein:
the plurality of discs are serially arranged to align circumferential positions of the third through-holes formed in the plurality of the discs.

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• Suzuki Daisuke
• Miura Sadao

Classifications

• H05H9/02

  Travelling-wave linear accelerators {(travelling-wave tubes H01J25/34)} · CPC title

• H05H7/16 Primary

  of the waveguide type · CPC title

• H05H7/22

  Details of linear accelerators, e.g. drift tubes (H05H7/02 - H05H7/20 take precedence) · CPC title

• H05H9/04 Primary

  Standing-wave linear accelerators · CPC title

• H05H7/18

  Cavities; Resonators {(travelling-wave tubes H01J23/18; hyperfrequency cavities in general H01P7/04, H01P7/06)} · CPC title