Unlock instant, AI-driven research and patent intelligence for your innovation.

Metal electrode, and, electron gun, electron tube, and x-ray tube using same

A technology of metal electrodes and X-ray tubes, applied in X-ray tubes, X-ray tube electrodes, parts of X-ray tubes, etc., can solve problems such as inhomogeneity, and achieve the effect of improving withstand voltage performance

Inactive Publication Date: 2016-11-23
SHIMADZU SEISAKUSHO CO LTD
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the usual passivation film is extremely thin, so it is not uniform and has minute depressions or pinholes

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Metal electrode, and, electron gun, electron tube, and x-ray tube using same
  • Metal electrode, and, electron gun, electron tube, and x-ray tube using same
  • Metal electrode, and, electron gun, electron tube, and x-ray tube using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0027] figure 1 (a) is a schematic sectional view showing the structure of the X-ray tube of the example.

[0028] figure 1 (b) is enlarged figure 1 (a) is a schematic cross-sectional view of the present invention showing the focusing cup electrode 33 .

[0029] figure 1 An X-ray tube 1 shown in (a) includes a vacuum container 2 , a cathode 3 , an anode 4 , and a target 5 . The cathode 3 , the anode 4 and the target 5 are accommodated in the vacuum container 2 .

[0030] The cathode 3 generates electron beams B. The cathode 3 includes an emitter electrode 31 , an emitter portion 32 , a focusing cup electrode 33 , and a fixing portion 34 . The bottom of the vacuum container 2 is sealed by the insulator 7 , but the emitter electrode 31 and the fixed portion 34 are configured to be electrically connected through the insulator 7 .

[0031] The emitter electrode 31 i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

A metal provided with a passive film (33a) of 10 nm or greater in thickness is used as a metal electrode (focusing cup electrode) (33) for generating an electric field in vacuum. The passive film (33a) can be formed to be thicker than 10 nm by forming the metal electrode (33) from stainless steel, and immersing this stainless steel into a treatment solution to perform film treatment (passivation treatment). In this way, the passive film (33a) is thicker than 10 nm, has a uniform surface, excellent adhesion and no pinhole, and thus allows the voltage-resistance performance to be improved.

Description

technical field [0001] The invention relates to a metal electrode used in vacuum, an electron gun, an electron tube and an X-ray tube using the metal electrode. Background technique [0002] Electron guns, X-ray tubes, and the like operate by generating a voltage difference between electrodes in a vacuum (for example, between a focus cup surrounding a filament and an anode). Usually, the electrode is designed so that the electric field on the surface of the electrode is 10 kV / mm or less, and the electrode is used with the surface polished, and the electrode is cleaned so that dust and the like do not adhere to the electrode. These practices can be said to make the electrode surface uniform and smooth, and the electric field will not be locally concentrated, thereby preventing electrode discharge. In addition to dust, if there are tiny pinholes on the grinding surface, the small corners will become high electric field and discharge. There are many types of grinding such as ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01J35/04H01J1/46H01J35/14
CPCH01J35/04H01J35/14H01J35/112H01J35/066
Inventor 浮田昌昭和泉拓朗古贺裕介
Owner SHIMADZU SEISAKUSHO CO LTD