基于阴阳极距离的辐照电子枪性能的研究

Study on Performance of Irradiated Electron Gun Based on Distance between Anode and Cathode

目前,辐照技术被广泛应用在航空航天、生物医疗、化学科学等各个领域,但大多数都是利用辐照技术提高生产加工效率,对辐照电子枪的研究探索较少。简述电子束辐照技术的原理和特点,针对辐照电子枪在实际检测调试出现放电次数过多的问题进行了解决,并优化设计辐照电子枪设备,提高辐照电子枪性能。通过对电场和电子束阴阳极距离的CST仿真研究,探索辐照电子枪中电子束性能的变化,并优化了阴阳极距离。实验结果表明,改良后的电子枪在阴阳极距离为63 mm时加速电压可以达到250 kV,并且不会产生放电现象。

At present, irradiation technology is widely used in aerospace, biomedicine, chemical science and other fields,but most of them use irradiation technology to improve the production and processing efficiency, and the researches on irradiation electron gun are less. The principle and characteristics of electron beam irradiation technology was briefly described and the problem of excessive discharge times in actual detection and debugging of the irradiated electron gun was solved. The performance of the irradiated electron gun was improved by optimizing the design of the irradiated electron gun equipment. Through the CST simulation study of the electric field and electron beam cathode-anode distance, the variation of electron beam performance in the irradiated electron gun was explored, and the cathode-anode distance was optimized. The experimental results show that the improved electron gun can achieve an acceleration voltage of 250 kV when the distance between the cathode and the anode is 63 mm, and no discharge phenomenon occurs.