Photocathode microwave electronic gun automatic aging system and method

A technology of microwave electron gun and photocathode, which is applied in nuclear science and nuclear fields, can solve the problems of poor consistency of aging electron guns, time-consuming and labor-intensive repeatability, and cavity breakdown, so as to reduce spark discharge and dark current, and prevent high-power damage , Improve the performance and life of the effect

Inactive Publication Date: 2018-03-30
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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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 o...

Method used

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  • Photocathode microwave electronic gun automatic aging system and method
  • Photocathode microwave electronic gun automatic aging system and method

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Embodiment Construction

[0040] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0041] Such as figure 1 Shown is a photocathode microwave electron gun 101, which the present invention is used for aging. The klystron 102 can generate MW-level high-power microwaves for providing microwave power to the photocathode gun 101 . 103 is a modulator, which generates pulse high voltage and supplies it to the klystron 102 . The console 104 includes an automatic aging system program, which controls the microwave power generated by the klystron to realize the automatic aging of the photocathode gun 101 . A Fast Beam Transformer (FCT) 105 is used to measure the spark discharge or dark current on the inner wall of the oxygen-free copper cavity of the photocathode gun 101 fed with high power. One oscilloscope 106 is used to display the current waveform of the FCT 105; the other oscilloscope 107 is used to display the current waveform of the klystron 102; the...

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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...

Claims

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Application Information

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IPC IPC(8): H01J9/44H01J9/12
CPCH01J9/44H01J9/12
Inventor 汤振兴张未卿杨学明
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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