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Photomultiplier

A photomultiplier tube and photoelectric technology, applied in the direction of dynode, electron multiplier details, multiple dynode electrode devices, etc., can solve problems such as difficulty in miniaturization, insufficient time response, and long electron flight time

Inactive Publication Date: 2003-09-24
HAMAMATSU PHOTONICS KK
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  • Abstract
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Problems solved by technology

The box-shaped dynode is a complex and large-scale structure composed of a box-shaped secondary electron emitter and a grid, and it is difficult to achieve miniaturization, and there are also problems in vibration resistance
[0009] Due to the use of box-shaped dynodes, the flight time of electrons is long and the time response is not good enough

Method used

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Embodiment Construction

[0032] refer to Figure 1 to Figure 6 A photomultiplier tube according to an embodiment of the present invention will be described. The photomultiplier tube 1 of the present embodiment is equipped with a tubular vacuum container 2 having a tube axis X. As shown in FIG. figure 1 It is a cross-sectional view showing a state where the photomultiplier tube 1 is cut along the tube axis X. FIG. The tubular vacuum container 2 is made of a material such as Kovar glass.

[0033] Both ends of the tubular vacuum container 2 in the direction of the tube axis X are closed, one end is flat, and the inner surface forms a photoelectric surface 2A that emits electrons after receiving light. The photoelectric surface 2A is formed, for example, by reacting an alkali metal vapor with antimony deposited on the inner surface of one end of the tubular vacuum container 2 in advance. The other end of the tubular vacuum vessel 2 is provided with a plurality of wire light pins 2B, and these wire pins...

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Abstract

A photomultiplier tube with good vibration resistance, pulse (straight) linearity and high time response, the 4th and 6th to 9th dynodes (Dy4, Dy6 to Dy9) are used and the 2nd dynode ( Dy2) has substantially the same shape as the dynode. In addition, the third-stage and fifth-stage dynodes (Dy3 to Dy5) use smaller dynodes than the second-stage dynode (Dy2). Ten stages of dynodes (Dy1 to Dy10) are arranged such that the route of the internal space of the dynode formed between the facing dynodes crosses the tube axis (X). As the anode (A), a mesh-shaped anode (A) is used, and the mesh-shaped anode (A) is arranged on the opposite side to the second-stage dynode (Dy2) with respect to the tube axis (X).

Description

technical field [0001] The invention relates to a photomultiplier tube, in particular to a photomultiplier tube with good vibration resistance, pulse (straight) linearity and high time response. Background technique [0002] JP-A-2-291655 describes a photomultiplier tube having a compass-shaped electron multiplier. In the compass-shaped electron multiplier, the inner space of the dynode formed between the facing dynodes forms an arc around an axis perpendicular to the tube axis, and the second-stage dynode and anode are respectively located on both sides of the tube axis. Therefore, the photomultiplier tube can be shortened in the tube axis direction, and the overall shape can be miniaturized. [0003] In this photomultiplier tube, since the internal space route of the dynode is formed in an arc shape, the concave dynode is arranged outside the arc, and the substantially planar dynode is arranged with a surface area smaller than that of the outer multiplier. inside the arc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J43/20H01J43/18
CPCH01J43/18
Inventor 木村末则古桥雅美石津智洋伊藤益保
Owner HAMAMATSU PHOTONICS KK
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