A high-pressure-resistant gas-filled collector used on traveling wave tubes

Abstract

The invention discloses a high pressure-withstanding inflatable collector used on a travelling wave tube. The collector comprises an inner collector and an outer collector. A beryllium oxide porcelain component is arranged between the inner collector and the outer collector. A cavity between the inner collector and the outer collector is a high-pressure inflation cavity. The high-pressure inflation cavity and an inner cavity of the inner collector are sealed and separated. In the invention, through using an insulation porcelain sealing component, one airtight environment possessed in a traditional collector is isolated into two airtight environments. The collector can be used in a high depressed collector travelling wave tube structure and is suitable for a high-efficiency high-cathode voltage depressed collector travelling wave tube efficiency increase application. And the collector possesses advantages of high pressure withstanding, high reliability and the like.

Description

technical field [0001] The invention relates to a collecting pole, in particular to a high pressure-resistant gas-filled collecting pole used in a traveling wave tube. Background technique [0002] The main function of the collecting pole of the traveling wave tube is to recover the electrons emitted by the electron gun. After being adjusted by the high-frequency focusing magnetic field, the electrons return to the collecting pole at high speed. The efficiency of the whole tube can be greatly improved by using a high-pressure drop or multi-stage drop-pressure collector. [0003] The operating voltage of high-power traveling wave tubes is basically above 15kV. If the collector voltage (to the anode) reaches 70%-80% of the cathode voltage (the collector voltage drops to 20%-30% of the cathode voltage), then There is basically no backflow, and the efficiency of this type of traveling wave tube can be increased by more than 30% or even more than 35%. [0004] At present, the w...

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Problems solved by technology

[0004] At present, the working power of the collector of the traditional commonly used traveling wave tube is basically around 10kV, which is far from meeting the requirements for the use of high cathode voltage traveling wave tubes.

refer to figure 1 as shown, figure 1 It is a schematic diagram of the structure of the traditional collector, in which the beryllium oxide ceramic part 3' is welded between the inner collector 2' and the outer collector 1', and there is an airtight vacuum environment in the traditional collector, and the airtight vacuum environment is the inner collector 2' The inner cavity 21' of the inner cavity 21' and the cavity 4' between the inner collector 2' and the outer collector 1', because the surface of the beryllium oxide ceramic part 3' is metallized, the flow of solder on the surface after high temperature baking will cause beryllium oxide The withstand voltage characteristics are reduced. At the same time, because the collector is in a vacuum environment, the metal and ceramic parts will release trace gas after long-term storage of the collector. , causing the vacuum environment to enter a low-pressure environment. According to the law of Parson, long-term storage will affect the pressure resistance of the collector.

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