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Multiplier stage for photomultiplier tube and preparation method thereof

A photomultiplier and useful technology, applied in electron multiplier dynodes, electron multiplier details, dynodes and other directions, can solve the problem that the finished product is difficult to meet the shape requirements of the dynode material, the hard and brittle second phase is easy to become a crack source, and the secondary The problem of reducing the secondary emission coefficient, etc., can improve the gain effect and anti-aging performance, improve the aging hardening effect, and improve the adsorption performance.

Active Publication Date: 2022-02-22
HANGZHOU ANYU TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing multiplied copper-beryllium alloy grade belongs to the beryllium oxide type, and its traditional preparation process is the semi-continuous casting and rolling method. In the preparation process, the hard and brittle second phase produced is very easy to become the source of cracks, causing the plate to crack during processing. , making it difficult for the finished product to meet the shape requirements of the dynode material, and the exposure of the BeO-type multiplier to air will lead to a decrease in the secondary emission coefficient

Method used

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  • Multiplier stage for photomultiplier tube and preparation method thereof
  • Multiplier stage for photomultiplier tube and preparation method thereof
  • Multiplier stage for photomultiplier tube and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0062] Embodiment 1: a kind of copper beryllium alloy:

[0063] This embodiment provides a copper-beryllium alloy, each component is calculated by weight percentage, including: Be: 2.5%, Co: 0.4%, Ni: 0.45%, Zr: 0.6%, Ce: 0.045%, and the balance is Cu And unavoidable impurity; Namely the weight ratio of Ce, Be is Ce / Be=0.018;

[0064] The copper beryllium alloy is prepared by the following method:

[0065] Under the protection of argon, high-purity Cu is smelted at 1300°C, and then Be, Co, Ni, Zr, and Ce are added for smelting. After complete melting, refining agent (addition amount is 25g / kg) is added for refining, and the slag is removed. , and then held at 1150°C for 13 minutes; semi-continuous casting process was used for casting and slag removal, the casting temperature was 1050°C, the casting speed was 70mm / min, and the cooling water flow rate was 11m 3 / h; solution treatment at 840°C for 3h, rapid cooling to 770°C for solution treatment for 6h; hot extrusion treatment...

Embodiment 2

[0071] Embodiment 2: another kind of copper beryllium alloy:

[0072] This embodiment provides another copper-beryllium alloy, each component is calculated by weight percentage, including: Be: 2.5%, Co: 0.4%, Ni: 0.45%, Zr: 0.6%, the balance is Cu and unavoidable Impurities; that is, without adding Ce;

[0073] The preparation method of copper-beryllium alloy is the same as that of Example 1.

Embodiment 3

[0074] Embodiment 3: another kind of copper beryllium alloy:

[0075] This embodiment provides another copper-beryllium alloy, each component is calculated by weight percentage, including: Be: 2.5%, Co: 0.4%, Ni: 0.45%, Zr: 0.6%, Ce: 0.025%, and the balance is Cu and unavoidable impurities; that is, the weight ratio of Ce and Be is Ce / Be=0.01;

[0076] The preparation method of copper-beryllium alloy is the same as that of Example 1.

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Abstract

The invention belongs to the technical field of photomultiplier tubes, and in particular relates to a multiplication stage for photomultiplier tubes and a preparation method thereof. The invention provides a beryllium-copper alloy, which includes a copper-beryllium alloy base material, a beryllium oxide core layer formed by oxidation on the surface of the base material, and a beryllium nitride skin layer formed by nitriding. The copper-beryllium alloy overcomes the difficulty in the prior art The problem of cracking, good thermal processing performance, excellent mechanical properties and high temperature creep resistance, the copper beryllium alloy is used to prepare the multiplication stage for photomultiplier tubes, and the obtained multiplication stage has high secondary emission coefficient, high gain effect and excellent anti-aging performance .

Description

technical field [0001] The invention belongs to the technical field of photomultiplier tubes, and in particular relates to a multiplication stage for photomultiplier tubes and a preparation method thereof. [0002] technical background [0003] The photomultiplier tube is a vacuum electronic device that converts weak light signals into electrical signals. It has extremely high sensitivity and ultra-fast time response, and can work in the spectral regions of ultraviolet, visible and near-infrared regions. It has high gain, low noise, Due to its short response time and other advantages, it is widely used in the fields of electronics, machinery, and biomedicine. [0004] The multiplier stage is an important component of the photomultiplier tube, which has an important impact on the sensitivity, gain, and stability of the photomultiplier tube. At present, the commonly used multiplier materials mainly include copper-beryllium alloy and silver-magnesium alloy. The existing multip...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C1/02C22C1/06C22F1/08C23C8/34C23C8/80H01J43/10H01J9/12B01J20/10B01J20/30
CPCC22C9/00C22C1/02C22C1/06C22F1/08C23C8/34C23C8/80H01J43/10H01J9/125B01J20/10
Inventor 章贤骏方涌宣兆康凌建鸿
Owner HANGZHOU ANYU TECH CO LTD
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