Acceleration cavity, accelerator, and resonance frequency adjustment method of acceleration cavity

Patent metadata

Field	Value
Publication number	US-10609807-B2
Application number	US-201716097706-A
Country	US
Kind code	B2
Filing date	May 1, 2017
Priority date	May 6, 2016
Publication date	Mar 31, 2020
Grant date	Mar 31, 2020

Abstract

An objective of the invention is to provide an acceleration cavity, an accelerator, and a resonance frequency adjustment method of an acceleration cavity that can change the natural resonance frequency of the acceleration cavity without occupying space between adjacent accelerator cavities. A QWR includes: a body portion whose axial direction is parallel to the vertical direction, and having a cylindrical side face portion; an upper face portion provided in an upper part of the body portion and is a plate-shaped member; and a deformation adjustment portion applying a pressing force on the upper face portion to deform the upper face portion.

First claim

The invention claimed is:

1. An acceleration cavity, comprising:
a body portion whose axial direction is parallel to a vertical direction, and having a cylindrical side face portion;
an upper face portion which is provided in an upper part of the body portion and is a plate-shaped member;
a deformation adjustment portion applying a pressing force on the upper face portion to deform the upper face portion,
wherein
an upwardly protruding rib that is a plate-shaped member is provided on a plane of the upper face portion,
the deformation adjustment portion applies a pressing force by coming into contact with the rib, and
the upper face portion is annular, and has a vertically upwardly protruding curved face.

2. The acceleration cavity according to claim 1 , wherein
a plurality of the deformation adjustment portions are provided, each of the deformation adjustment portions applying a pressing force on a different position in the upper face portion.

3. The acceleration cavity according to claim 1 , wherein
a part of the upper face portion with which the deformation adjustment portion comes into contact is thinner than other parts.

4. The acceleration cavity according to claim 1 , wherein
a part of the upper face portion with which the deformation adjustment portion comes into contact is formed into a flat plate shape.

5. An accelerator comprising the acceleration cavity according to claim 1 .

6. A method for resonance frequency adjustment of an acceleration cavity,
the acceleration cavity including:
a body portion whose axial direction is parallel to a vertical direction and having a cylindrical side face portion,
an upper face portion which is provided in an upper part of the body portion and is a plate-shaped member, the upper face portion being annular and having a vertically upwardly protruding curved face, and
an upwardly protruding rib as a plate-shaped member being provided on a plane of the upper face portion,

the method comprising:
deforming the upper face portion by a deformation adjustment portion applying a pressing force on the upper face portion by coming into contact with the rib.

7. The method according to claim 6 , wherein
in the deforming of the upper face portion, the upper face portion is plastically deformed or elastically deformed.

8. The method according to claim 6 , wherein
a plurality of the deformation adjustment portions are provided, and the upper face portion is deformed by all or some of the deformation adjustment portions.

Assignees

• Mitsubishi Heavy Ind Mach Systems Ltd

Inventors

• Suda Kenji
• Yamada Kazunari
• Sakamoto Naruhiko
• Ozeki Kazutaka
• Kamigaito Osamu
• Yanagisawa Takeshi
• Sennyu Katsuya

Classifications

• H05H9/00 Primary

  Linear accelerators · CPC title

• H05H7/22 Primary

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

• H05H9/02

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

• H05H7/20 Primary

  with superconductive walls · CPC title