Dynode film structure and electron multiplier based on dynode film structure

Abstract

The invention discloses a dynode film structure and an electron multiplier based on the dynode film structure. A diamond film dynode for the electron multiplier comprises a base frame box, an arc-shaped secondary electron dynode piece, a clamping base plate and a gate electrode. The base frame box is used for storing and fixing the arc-shaped secondary electron dynode piece. The arc-shaped secondary electron dynode piece is formed by growing a diamond film having high secondary electron emission efficiency on the inner side of an arc-shaped surface of a metal sheet of an arc-shaped metal substrate through the microwave plasma chemical vapor deposition (MPCVD) method. The secondary electron dynode piece and the base frame box are tightly fixed together through the clamping base plate. The grate electrode has the effect of accelerating incident electrons. The dynode film structure and the electron multiplier based on the dynode film structure have the characteristics that the secondary electron emission coefficient is high, the secondary emission coefficient reduction performance is excellent, and the structure of the film is stable; in addition, the dynode base frame box of the electron multiplier can be installed extremely conveniently, and the original properties of the film cannot be damaged. The dynode film structure and the electron multiplier based on the dynode film structure have the advantages of being low in manufacturing cost, simple in structure and high in working performance.

Description

technical field [0001] The invention belongs to the field of signal processing equipment, and in particular relates to a dynode film structure and an electron multiplier based on the dynode film structure. Background technique [0002] An electron multiplier is a conversion device that converts a weak electrical signal into a measurable electrical signal. It is an electronically sensitive plate, which emits a large number of secondary electrons after being impacted by high-energy electrons, thereby causing a cascade amplification effect. [0003] refer to figure 1 , the primary electrons are vertically incident on the grid of the first-stage dynode, and the energy of the primary electrons is continuously increased under the action of the electric field of the grid, and pass through the grid to bombard the inner surface of the first-stage dynode, generating more secondary electrons secondary electrons. [0004] Usually, the dynode is usually prepared by copper-beryllium al...

AI Technical Summary

Problems solved by technology

Oxidation and sputtering both have their defects in technology or insufficient material properties.

For example, the process consistency of the oxidation method is not high, and the sputtering method is easy to form an uneven sample surface when preparing a curved surface structure, and the material can only be selected from traditional metal oxides or other non-metallic materials.

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