Porous metal electrode for multistage depressed collector

A technology of porous metal and collector, which is applied to collectors and traveling wave tubes of time-of-flight electron tubes, can solve the problems of multi-stage step-down collectors suppressing secondary electrons, and achieve the effect of improving efficiency and suppressing emission

Inactive Publication Date: 2011-07-06
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0020] From the above, it can be seen that the problem of suppressing secondary el

Method used

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  • Porous metal electrode for multistage depressed collector
  • Porous metal electrode for multistage depressed collector
  • Porous metal electrode for multistage depressed collector

Examples

Experimental program
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Embodiment Construction

[0030] The invention uses the known electric spark wire cutting method, electric spark corrosion method or ion bombardment method to manufacture the electrode of the multi-stage step-down collector.

[0031] The porous metal material of the present invention can adopt existing porous nickel, porous tungsten and porous molybdenum materials in the domestic and foreign markets; its pore size is not strictly required, and the preferred pore size can be 20% to 40%.

[0032] After the porous material is chemically cleaned, the electrode surface of the multi-stage step-down collector electrode is treated with a wire electric discharge method, an electric spark corrosion method or an ion bombardment method, so that the bombarded surface exposes a surface morphology with many pits.

[0033] The present invention uses the ion bombardment method to bombard the electrode surface, and after observing with an electron microscope, a large number of expected pits (such as figure 2 shown).

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Abstract

The invention provides a porous metal electrode for a multistage depressed collector. The porous metal electrode is prepared by processing the surface of a porous metal material by utilizing a wire electrical discharge machining method, a spark erosion method or an ion bombardment method so as to form pits on the surface of the porous metal material. The porous metal material is made of porous nickel, porous tungsten or porous molybdenum, wherein the porosity is between 20 and 40 percent. The electrode of the multistage depressed collector is manufactured by metal, so a multi-pit surface is formed on the surface of the multistage depressed collector, transmission of secondary electrons is inhibited, and efficiency of the multistage depressed collector is improved.

Description

technical field [0001] The invention belongs to the field of traveling wave tube devices, and in particular relates to a porous metal electrode for a multi-stage step-down collector. Background technique [0002] The traveling wave tube is one of the important members of the family of microwave electric vacuum devices. It is a device that amplifies the electromagnetic wave by interacting with the electron beam in the interaction area of ​​the traveling wave tube. Traveling wave tube generally consists of five parts: electron gun, magnetic focusing system, slow wave structure, energy transmission device, single-stage or multi-stage step-down collector. Among them, the multi-stage step-down collector is the key component of various traveling wave tubes and some klystrons. Its function is to recover the remaining kinetic energy in the electron beam after the beam-wave interaction, thereby greatly improving the overall performance of the device. efficiency. [0003] Due to the...

Claims

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Application Information

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IPC IPC(8): H01J23/027H01J25/34
Inventor 王自成刘燕文
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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