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Photomultiplier

A technology of photomultiplier tubes and dynodes, applied in dynodes, electron multiplier details, electron multiplier anode devices, etc., can solve problems such as inability to manufacture so easily, insufficient vibration resistance, and complex structural design

Inactive Publication Date: 2007-04-04
HAMAMATSU PHOTONICS KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, the conventional photomultiplier tube described in JP-A-60-254547 originally does not have the high vibration resistance required for oil exploration, etc., and the mesh-shaped anode used in the photomultiplier tube has insufficient vibration resistance and cannot be used. in oil exploration etc.
[0010] Also, in the photomultiplier tube described in JP-A No. 61-17099, although it is configured to prevent the bending and inclination of the anode, it still has insufficient vibration resistance, and the structural design is complicated, so it cannot be manufactured so easily.

Method used

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Embodiment Construction

[0032] The photomultiplier tube according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 6 . The photomultiplier tube 1 of the first embodiment is provided with a tubular vacuum container 2 having a tube axis X. As shown in FIG. FIG. 1 is a cross-sectional view showing a case where a photomultiplier tube 1 is cut along a tube axis X. As shown in FIG. The tubular vacuum container 2 is made of a material such as Kovar glass (cobalt glass).

[0033] Both ends of the tubular vacuum container 2 in the direction of the tube axis X are closed, and one end is formed in a planar shape, and a photoelectric surface 2A that receives light and emits electrons is formed on the inner surface. The photoelectric surface 2A is formed, for example, by reacting an alkali metal on antimony deposited on the inner surface side of one end of the tubular vacuum vessel 2 in advance. Also, on the other end surface of the tubular vacuum vessel 2, a plura...

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Abstract

A photomultiplier excellent in vibration resistance and having an anode with good pulse linearity characteristic. The photomultiplier has a mesh anode (A) composed of an anode frame (A11) and a mesh electrode (A12) supported and surrounded by the anode frame (A11). The central portion of one long side (A11B) of the anode frame (A11) serves as an electron converging part (F). The inner side of the anode frame (A11) swells toward the inner part of the anode (A), more from the middle of the long side (A11B) toward the corners of the anode frame (A11) along the long side (A11B), and therefore the thickness of the anode frame (A11) increases from the middle of the long side (A11) to the corners along the long side (A11B).

Description

technical field [0001] The present invention relates to photomultiplier tubes, in particular to photomultiplier tubes used in oil exploration and the like. Background technique [0002] In the past, as a photomultiplier tube designed in a device that vibrates violently in oil exploration, a type that is short and compact in the tube axis direction and has a rod-shaped anode and a ring gauge type dynode is known. [0003] Japanese Unexamined Patent Application Publication No. 2-291655 describes a photomultiplier tube having a ring-type electron multiplier and a rod-shaped anode. On the electron multiplier part of the ring meter type, the dynode internal space channel formed between the facing dynodes is designed as a circular arc around the axis perpendicular to the tube axis, and the second-stage dynode and anode are located in the tube. opposite side of the axis. Therefore, the photomultiplier tube is shortened in the tube axis direction, and the overall shape is miniatur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J43/12H01J43/20
CPCH01J43/12
Inventor 石津智洋木村末则
Owner HAMAMATSU PHOTONICS KK
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