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目前正在欧洲核子中心(CERN)建造的LHC(L arge H adron Co llider)是世界上最大的加速器,它是一个具有高能量(7 T eV)大流强(0.53 A)的质子加速器。在它的直线节真空系统中,绝大部分的真空盒内表面将被镀上NEG薄膜。这样在又细又长的真空盒里,当有束流通过时,NEG薄膜不仅可以作为分布式吸气剂泵使用,而且NEG薄膜还具有降低二次电子发射系数的作用,因此了解NEG薄膜的性能是很重要的。
The LHC, currently under construction at CERN, is the world’s largest accelerator, a proton accelerator with a high energy (7T eV) jet (0.53 A). In its linear section vacuum system, most of the inner surface of the vacuum box will be coated with NEG film. In a thin and long vacuum box, NEG film can be used not only as a distributed getter pump, but also as a beam-passing NEG film. The NEG film also has a function of reducing the secondary electron emission coefficient. Therefore, it is possible to understand the performance of the NEG film It is very important.