可更换阴极热子的辐照加速器用电子枪  

An electron gun with replaceable cathode-heater assembly for an E-beam irradiator

作　　者：吴迅雷[1] 于晓娟[1] 蒋振柏[1] 

机构地区：[1]中国科学院电子学研究所,北京100190

出　　处：《核技术》2011年第1期56-59,共4页Nuclear Techniques

摘　　要：本文介绍了工作电压为60 kV、峰值电流为550–600 mA、射程要求为60 mm、注腰不大于Φ?4 mm的电子枪的研制。该电子枪用于辐射加工电子直线加速器(10 MeV 1.5 mA)。为降低加速器的运营成本,该电子枪特别设计为可更换阴极热子型。采用Egun、Mafia等软件进行模拟计算,基本按照速调管生产的工艺流程,制成该电子枪。热测及束斑测试表明,该电子枪各项参数均达用户要求,目前已在加速器上正常运行约3000 h。A new type of electron guns has been developed for a 10 MeV 1.5 mA linac for radiation processing. The specifications required are： cathode voltage 60 kV, peak beam current 550–600 mA, spot size 4 mm, and working distance 60 mm. Particularly, this electron gun is advantageous in its replaceable cathode-heater assembly. This helps the customers to reduce their operation cost. The Egun and Mafia codes were used to simulate electromagnetic fields and electron trajectories. The guns were produced in the same technology of our klystron production. Design specifications of the gun were achieved in the beam current test and beam spot test. The first gun of this type has been working on an linac for about 3000 hours.

关 键 词：电子枪 电子束辐照装置 可更换阴极 可更换热子 束斑测试 

分 类 号：TL503.3[核科学技术—核技术及应用]