论文标题
梁和真空系统墙之间的相互作用
Interaction Between Beams and Vacuum System Walls
论文作者
论文摘要
在现代的高强度加速器中，循环光束与真空束管有多种相互作用，从而导致各种不同的现象。他们中的大多数人在此CAS报告的其他贡献中进行了详细讨论。我将其集中在与加速器束管中的电子有关的影响上。已知加速器中的低能电子与循环光束相互作用，从而增加了所谓的E $^ - $云的形成。 E $^ - $云效应可能不利于光束质量和稳定性，尤其是对于带正电荷的光束。我将首先描述引起加速器中E $^ - $云形成的原点和基本特征，这不仅取决于梁的性质，而且取决于真空容器表面性能。这种材料特性和可以研究它们的方式将在这里简要介绍。最后，将描述和讨论到目前为止采用和提出的一些E $^ - $云缓解策略。
In modern high-intensity accelerators, the circulating beam interacts in many ways with the vacuum beam pipe, causing a variety of different phenomena. Most of them have been discussed at length in other contributions to this CAS report. I concentrate here on the effects associated with the presence of electrons in the accelerator beam pipes. Low-energy electrons in accelerators are known to interact with the circulating beam, giving raise to the formation of a so-called e$^-$ cloud. e$^-$ cloud effects can be detrimental to beam quality and stability, especially for positively charged beams. I will first describe the origin and the basic features causing e$^-$ cloud formation in accelerators, which depend not only on the beam properties but mainly on the vacuum vessel surface properties. Such material properties and the way one can study them will be here briefly presented. Finally, some of the e$^-$ cloud mitigation strategies adopted and proposed so far will be described and discussed.
