Method for monitoring discharge energy instantaneous value and accumulation value of klystron

Abstract

The invention discloses a method for monitoring a discharge energy instantaneous value and an accumulation value of a klystron. According to the invention, when sparking occurs at a klystron, collection and integrated logic processing of a discharge over-current waveform peak value, a pulse width and the number of times for sparking are carried out, thereby determining the amount of the instantaneous discharge energy and the amount of the accumulation discharge energy when sparking occurs at the klystron. On the basis of utilization of the amount of the discharge energy, the duration time of the pulse high voltage loaded on the klystron is controlled, so that the metal burr inside the klystron can be removed by fully utilizing the discharge energy on the premise of security protection of the klystron and thus an objective of improvement of the voltage-withstanding testing efficiency of the klystron can be achieved. Therefore, the provided method is especially suitable for an occasion of klystron testing with utilization of a linear pulse modulator and also can be applied to testing equipment of vacuum devices that include other types of klystrons, travelling wave tubes and gyrotrons and the like and have discharge energy restrictive measures.

Description

technical field [0001] The invention relates to the technical field of electric vacuum devices, and is a method for improving the efficiency of a klystron withstand voltage test (sophisticated test), and is especially suitable for testing a klystron by a linear pulse modulator. Background technique [0002] The klystron withstand voltage test (also called aging test) is one of the necessary test links in the development and production process of the klystron. The klystron will form a lot of microscopic metal burrs inside due to the technical limitations of the processing technology. The metal burrs in the electron gun area with high field strength will produce a tip discharge phenomenon (also called a sparking phenomenon) during the voltage application process of the klystron. The ions generated during the discharge process may bombard the surface of the cathode, causing damage to the cathode material, and then shorten the life of the cathode or even damage the failure. Th...

AI Technical Summary

Problems solved by technology

This method cannot judge the cumulative value of the arc energy, nor can it accurately reflect the instantaneous value of the discharge energy.

The use of this kind of ignition protection will either cause the threshold setting to be too low and frequent discharge failures, which will reduce the test efficiency, or the risk of klystron damage will be increased due to the threshold setting being too high

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