Photocathode microwave electronic gun automatic aging system and method

Abstract

The invention discloses a photocathode microwave electronic gun automatic aging system and a method and belongs to the nuclear science and nuclear technology field. In the invention, through monitoring phenomena of photocathode microwave electronic gun adsorption gas release, spark discharge and the like, and measuring parameters of a high voltage, input power, reflection power, a vacuum degree, an ion flow, a dark current and the like of a modulator, power increase during an aging process is automatically adjusted, a cavity is prevented from being damaged by high power, inconsistency of manual aging operation personnel is avoided and aging time is shortened. According to a measurement result, a cavity aging state is controlled. During the aging process, a program timely reads the aging state, a correlation parameter is automatically controlled, the spark discharge and generation of the dark current are reduced, and performance and a service life of the cavity are increased and prolonged. By using the method and the system, complete recording of the aging process can be achieved. Simultaneously, a lot of manpower, material resources and time can be saved.

Description

technical field [0001] The invention relates to an automatic aging system and method for a photocathode microwave electron gun. It belongs to the field of nuclear science and nuclear technology. Background technique [0002] The photocathode microwave electron gun is a key component widely used in free electron laser devices. The photocathode microwave electron gun produces high-brightness and low-emissivity electron beams for free electron laser devices. The electron beam generated by driving the laser to irradiate the photocathode establishes TM-like in the oxygen-free copper cavity 010 Accelerated under the action of a modulo electric field. Therefore, the operation of the electron gun needs to establish a high peak surface electric field in an ultra-high vacuum. The residual gas on the inner surface of the oxygen-free copper is ionized under the action of the high peak electric field, and the spark discharge or dark current inside the cavity will affect the performan...

AI Technical Summary

Problems solved by technology

There are several problems in manual burn-in by operators: First, the performance of the electron gun is highly dependent on the working ability of the operators

The consistency of aging electron guns by different operators is poor, and even high power input by mistake causes the cavity to break down

At the same time, manual processes can still be time-consuming, even for skilled operators

Second, the detailed aging process cannot be automatically recorded

The lack of detailed records is not conducive to the analysis of the characteristics of the gun and subsequent operation and maintenance

The third is that after the electron gun replaces the components or breaks the vacuum, the recovery system needs aging, which is time-consuming and labor-intensive repetitively.

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