Novel silver-magnesium alloy dynode and preparation method thereof

A silver-magnesium alloy, a new type of technology, applied in the field of silver-magnesium alloy multiplication level, silver-magnesium alloy multiplication level technology, and multiplication level, can solve the problems of insufficient emission coefficients, reduce the number of multiplication levels, increase gain, and avoid high-temperature vacuum Effect of Furnace Equipment and Components

Active Publication Date: 2019-11-01
陈新云 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the insufficient emission coefficient of the existing magnesia-type silver-magnesium alloy multiplication level and the defects in the process, and creat

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] After the prepared silver-magnesium alloy doubling stage is installed and sealed, the whole pipe is connected to the exhaust system and vacuumed to 10 -4 -10 - 5 pa, bake and degas for 1.5 hours, temperature 350°C, fill with oxygen to oxygen pressure 1.5pa, high-frequency induction heating doubling level to temperature 600°C, the surface of the doubling level is dark red, time is 8 seconds, deoxygenation, vacuuming to 10 -4 -10 -5 pa. Fill nitrogen to 35Kpa, high-frequency induction heating silver-magnesium alloy multiplier to a temperature of 1100°C, the surface of the multiplier turns bright red for 10 seconds, remove nitrogen, and vacuum to 10 -4 -10 -5 pa, the high-frequency induction heating is multiplied to a temperature of 600°C for 10 seconds, and the measured secondary emission coefficient is 5.3.

Embodiment 2

[0025] After the prepared silver-magnesium alloy doubling stage is installed and sealed, the whole pipe is connected to the exhaust system and vacuumed to 10 -4 -10 - 5 pa, bake and degas for 1.5 hours, temperature 350°C, fill with oxygen to oxygen pressure 2pa, high-frequency induction heating doubling level to temperature 500°C, the surface of the doubling level is dark red, the time is 10 seconds, deoxygenation, vacuuming to 10 -4 -10 -5 pa. Fill nitrogen to 40Kpa, high-frequency induction heating silver-magnesium alloy multiplier to a temperature of 1200°C, the surface of the multiplier is bright red for 12 seconds, remove nitrogen, and vacuum to 10 -4 -10 -5 pa, the high-frequency induction heating is multiplied to a temperature of 700°C for 12 seconds, and the measured secondary emission coefficient is 5.5.

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Abstract

The invention relates to a novel silver-magnesium alloy dynode and a preparation method thereof, which belong to the technical field of photomultipliers and photoelectric device dynodes. The surface layer of the dynode is a magnesium nitride film layer, and the core layer is a magnesium oxide film layer. The secondary emission coefficient is 5 to 6 (150V), which is more than 20% higher than that of the existing magnesium oxide type silver-magnesium alloy dynode. The sensitivity and the gains of the tube can be significantly improved, the service life is prolonged and the yield of products is increased, and miniaturization and portability of the tube and the assembly are also facilitated. The core magnesium oxide film is formed by oxidation of the silver-magnesium alloy base layer, the surface magnesium nitride film is formed by nitridation of the silver-magnesium alloy, an extra-tube high-temperature activation process of the conventional magnesium oxide type silver-magnesium alloy dynode is saved in the process, the production cost is reduced, and the influences on the dynode by exposed air are completely eliminated. The novel silver-magnesium alloy dynode can be used in a photomultiplier tube electron multiplier and used as a multiplier in a optoelectronic device.

Description

technical field [0001] The invention relates to a photomultiplier tube and photoelectric device multiplication stage technology, in particular to a silver-magnesium alloy multiplication stage technology, which belongs to the field of silver-magnesium alloy multiplication stage technology. Background technique [0002] The photomultiplier tube is an electric vacuum device that converts weak optical signals into electronic signals and amplifies them step by step for detection, analysis, and control. It is widely used in various fields of national economy and science and technology, such as electronics, machinery, biomedicine, and geological exploration. , high energy physics, aerospace development and national defense, etc. The multiplier stage is an important component used to amplify electronic signals, and it has an important impact on the sensitivity, gain, and stability of the photomultiplier tube. Silver-magnesium alloy multiplier is a commonly used alloy type multiplie...

Claims

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Application Information

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IPC IPC(8): H01J43/10H01J9/12
CPCH01J43/10H01J9/125
Inventor 陈开明陈新云
Owner 陈新云
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