纵向多灯丝电子帘加速器的束流成形与引出研究

Air pollution is one of the most serious problems in china, and the prevention of air pollution is also a big challenge facing china. For surface curing, the emission of VOC produced during the production can be greatly reduced in the use of low-energy electron beam curing technology. But the main models of the curing accelerator, "planar type electron curtain accelerator", is monopolized by foreign countries, which lays a great obstacle in the way of domestically popularizing the electron beam surface curing technology in our country. The knotty problem in the design of planar type electron curtain is “forming and extracting of large-area low-energy electron beam”, that should be taken into account as follows: studies the relationships between the electrodes’ parameter (shape, position, potential) and the electron beam’s uniformity; studies the extract proficiency of electron beam and the safety of titanium foil when low-energy electron beam extracting. And try to improve the beam extraction system thermal efficiency by coating thin foil of high thermal conductivity materials on titanium foil and using heat pipe. Finally, to build a prototype of the planar type electron curtain to verify and modify the theoretical research result, and at the same time pave the road for the domestication and development of planar type electron curtain in our country.

大气污染防治是我国目前面临的重大难题。对于VOC排放重点监控行业表面涂装和油墨固化来说，使用低能电子束固化技术可极大的降低其生产过程中的VOC排放量。但表面固化的核心装置“纵向多灯丝电子帘加速器”为国外垄断，对国内电子束固化技术推广极为不利。本项目以纵向电子帘加速器设计的难点 “大截面低能束流成形引出问题”为研究对象，重点研究：多灯丝电子枪内部阴极、栅极、反射极的电位、形状、位置对束流分布的影响；70keV~200keV电子束引出时的引出效率问题与钛窗安全问题。并尝试用镀膜和热管技术来提高引出系统的散热效率。利用部门的现有条件，研制1台小型样机，验证和修正理论研究结果，为纵向电子帘加速器国产化提供理论与实验基础。

低能电子束固化技术的工业应用占据了电子束辐照加工市场的一半左右，在国外支撑着每年600亿美元的终端应用市场。但国内相关产业才刚刚起步，低能电子加速器的国产化，电子束固化工艺的研究等等，是电子束固化技术国产化亟待解决的首要问题。本项目即针对这些问题所展开。..1、编写了考虑空间电荷效应的低能电子束描迹程序，可利用该程序研究电子枪内各构件及参数对束流分布的影响；同时也对电子束穿过钛膜时的能量沉积、反射、穿透进行了系统的总结。这些程序和数据结果可对后续工业用电子帘加速器提供参考。.2、建造了一台电子束固化仪，最终达到125kV/10mA，该设备已经可进行电子束固化的小试试验。搭建了一条电子束固化中试线，可进行卷材固化的中试测试。基于电子束固化仪和电子束固化中试线，进行了初步的树脂固化测试和样品测试。..这些设备的成功调试和电子束固化实验的顺利进行，可为在国内推广电子束固化技术提供国产的设备支持和理论支持。