用于NLC电子云还原的薄表面涂层的次级电子产额测量
Secondary electron yield measurements from thin surface coatings for NLC electron cloud reduction
摘要：
在下一代直线对撞机的正电子阻尼环的束管中，电子将通过束与周围真空室壁的相互作用而产生，并产生电子云。在不改变聚束结构或真空室直径的情况下，几种解决方案可以避免电子云。用于防止这种寄生电子负载的一些当前可用的解决方案包括减少由射束引起的残余气体电离、使射束光子诱导的电子产生最小化、以及降低腔室壁的次级电子产率（SEY）。我们将报告最近在SLAC上进行的SEY测量TiN涂层和TiZrV非蒸散吸气剂薄膜。
英文摘要：
In the beam pipe of the positron damping ring of the Next Linear Collider, electrons will be created by beam interaction with the surrounding vacuum chamber wall and give rise to an electron cloud. Several solutions are possible for avoiding the electron cloud, without changing the bunch structure or the diameter of the vacuum chamber. Some of the currently available solutions for preventing this spurious electron load include reducing residual gas ionization by the beam, minimizing beam photon-induced electron production, and lowering the secondary electron yield (SEY) of the chamber wall. We will report on recent SEY measurements performed at SLAC on TiN coatings and TiZrV non-evaporable getter thin films.
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