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Microchannel plate and preparation method thereof

A technology of microchannel plate and plate arrangement, which is applied in the manufacture of light-emitting cathodes, secondary emitter electrodes, detailed information of electron multipliers, etc., can solve problems such as affecting service life, poor stability, and gain reduction, and achieve gain improvement , Improving the resistance to electronic erosion, improving the service life and gaining performance

Active Publication Date: 2018-03-20
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to long-term electron erosion during use, the potassium and sodium ions in the emission layer of the microchannel plate migrate or overflow, resulting in poor stability and reduced gain, which seriously affects its service life.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] A kind of preparation method of microchannel plate that one embodiment of the present invention proposes, it comprises:

[0023] 1) Combining the core glass rod and the skin glass tube with rod and tube, wire drawing, arranging plates, melting and pressing, machining, and pickling to obtain a microchannel plate blank;

[0024] 2) performing ion exchange on the microchannel plate blank in molten salt, cleaning and removing the molten salt remaining on the surface, high temperature reduction, and coating to obtain a microchannel plate;

[0025] Wherein, the molten salt includes rubidium salt and / or cesium salt. The composition of the molten salt may also include potassium and sodium salts for adjusting the melting point and ion exchange activity of the molten salt.

[0026] Preferably, the rubidium salt is rubidium nitrate, and the cesium salt is cesium nitrate. Nitrate has a low melting point, not exceeding the transition point of glass, and is suitable as a molten sal...

Embodiment 1

[0030] A kind of preparation method of microchannel plate that one embodiment of the present invention proposes, it comprises:

[0031] 1) Combining the core glass rod and the skin glass tube, wire drawing, arranging plates, melting and pressing, machining, and pickling to obtain a microchannel plate blank with a diameter of 25 mm, a thickness of 0.38 mm, and a channel aperture of 6 μm;

[0032] 2) Perform ion exchange on the microchannel plate blank in molten salt, the temperature of the molten salt is 350°C, the ion exchange time is 15 minutes, and ultrasonically clean with deionized water to remove the residual molten salt on the surface, each time for 15 minutes, wash 3 times , high temperature reduction, coating, to obtain a microchannel plate;

[0033] Wherein, the molten salt is a mixed molten salt of rubidium nitrate and cesium nitrate.

[0034] Another embodiment of the present invention provides a microchannel plate prepared by the method of embodiment 1.

[0035] ...

Embodiment 2

[0037] A kind of preparation method of microchannel plate that one embodiment of the present invention proposes, it comprises:

[0038] 1) Combining the core glass rod and the skin glass tube, wire drawing, arranging plates, melting and pressing, machining, and pickling to obtain a microchannel plate blank with a diameter of 30 mm, a thickness of 0.50 mm, and a channel aperture of 25 μm;

[0039] 2) Perform ion exchange on the microchannel plate blank in molten salt, the molten salt temperature is 400°C, the ion exchange time is 2min, and the molten salt remaining on the surface is removed by ultrasonic cleaning with deionized water, each cleaning is 15min, and the cleaning is 3 times , high temperature reduction, coating, to obtain a microchannel plate;

[0040] Wherein, the molten salt is a mixed molten salt of rubidium nitrate, cesium nitrate and potassium nitrate.

[0041] Another embodiment of the present invention provides a microchannel plate prepared by the method of ...

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Abstract

The invention relates to a microchannel plate and a preparation method thereof. The preparation method comprises the steps of 1) performing bar-tube combination, wiredrawing, plate layout, melting, pressing, mechanical processing and acid cleaning on a core glass bar and a skin glass tube to obtain a microchannel plate blank; 2) performing ion exchange, cleaning, high-temperature reduction and film coating on the microchannel plate blank in molten salt to obtain a microchannel plate, wherein the molten salt comprises rubidium salt and / or cesium salt. According to the invention, ion exchange isperformed on the microchannel plate blank, so that rubidium ions and cesium ions with high atomic weight and large atomic radius replace potassium ions and sodium ions in a reflecting layer, the electron flushing resistant performance of the reflecting layer is improved by the aid of increase in atomic weight of alkali metal ions and a volume congestion effect, so that the service life and the gain performance of the microchannel plate are improved, and the service life and the gain of the microchannel plate are improved by more than 30% and 20% respectively.

Description

technical field [0001] The invention relates to the technical field of manufacturing micro-optical elements, in particular to a micro-channel plate and a preparation method thereof. Background technique [0002] Microchannel Plate (MCP) is a sheet-type electron multiplication array composed of millions of micron-scale glass channels, each of which is an electron multiplication system, with a conductive layer and an emission layer, a conductive layer Provide electrons, and the emission layer emits secondary electrons. When the incident electrons enter the channel and hit the inner wall of the channel, secondary emitted electrons will be generated. Under the action of the electric field, these secondary emitted electrons are accelerated and continue to hit the inner wall of the channel. After multiple collisions Finally, a large number of outgoing electrons are formed at the output of the channel, thereby forming an enhancement of the weak signal. [0003] Due to its small si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J9/12H01J43/24
CPCH01J9/125H01J43/246
Inventor 孙勇张兵强张洋侯伟杰刘娟
Owner CHINA BUILDING MATERIALS ACAD
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