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Multiplier electrode producing method and structure

A manufacturing method and technology of multiplier tubes, which are applied in the direction of multiplier electrodes, secondary emitter electrode manufacturing, electrode devices of multiple dynodes, etc., can solve the problem of reduced electron collection efficiency, weak braking electric field, returning to the n-layer side, etc. problem, to achieve the effect of suppressing the deterioration of electron collection efficiency and reducing the manufacturing cost

Inactive Publication Date: 2003-08-20
HAMAMATSU PHOTONICS KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the multiplier tube electrode disclosed in Japanese Patent Laid-Open No. 60-182642, since the input and output diameters of the through-hole are the same, there is a through-hole where the equipotential line cannot sufficiently enter the n-layer for braking electric field. The weak braking electric field inside and through-hole also has the problem that the released secondary electrons return to the n-layer side, which is one of the reasons for the decrease in electron collection efficiency.

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  • Multiplier electrode producing method and structure
  • Multiplier electrode producing method and structure
  • Multiplier electrode producing method and structure

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Embodiment Construction

[0032] Hereinafter, preferred embodiments of the method of manufacturing a multiplier tube electrode and its structure according to the present invention will be described in detail with reference to the drawings. In each figure, the same reference numerals are assigned to the same components, and description thereof will be omitted. This embodiment shows an example of a photomultiplier tube suitable for applying the present invention to a radiation detection device or the like.

[0033] figure 1 is a perspective view showing the photomultiplier tube of the first embodiment, figure 2 is along figure 1 A sectional view cut along the line II-II. The photomultiplier tube 1 shown in these figures has a substantially square cylindrical side tube 2 made of metal (for example, made of Kovar or stainless steel), and an open end A on one side of the side tube 2 is A photosensitive plate 3 made of glass (for example, made of Kovar glass or quartz glass) is fixed by fusion welding. ...

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Abstract

A dynode producing structure, in which the inner side surface of an electron multiplier hole (14) includes a first curved surface (19a) and a second curved surface (19b) opposed thereto. The first curved surface (19a) extends from the edge of an input opening (14a) so that it is opposed to the input opening (14a), and is formed in a substantially arcuate shape having a predetermined radius. The second curved surface (19b) extends from the edge of an output opening (14b) so that it is opposed to the output opening (14b), and is formed in a substantially arcuate shape having a predetermined radius.

Description

technical field [0001] The invention relates to a manufacturing method and a structure of a multiplier tube electrode used in an electron multiplier tube, a photomultiplier tube, and the like. Background technique [0002] Such multiplier tube electrodes are known, for example, as disclosed in Japanese Patent Laid-Open Nos. Sho 60-182642, 5-182631, and 6-314551. The multiplier tube electrode disclosed in Japanese Patent Publication No. 60-182642 is a perforated plate with a plurality of lumen-shaped, such as cylindrical through-holes. The through-holes pass through its longitudinal axis and the multiplier tube. The electrodes are symmetrical in the mid-front. The input and output diameters of the through-hole are the same, smaller than the inner diameter of the through-hole. In addition, the multiplier tube electrode is composed of two metal sheets, and each metal sheet having a converging or tapered hole formed by etching is arranged back-to-back with openings having a la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J9/12H01J43/20H01J43/22
CPCH01J43/22H01J9/125
Inventor 下井英树久嵨浩之
Owner HAMAMATSU PHOTONICS KK