OFE-铜X波段加速结构的表面分析及其与RF击穿事件的可能关系
Surface Analysis of OFE-Copper X-Band Accelerating Structures and Possible Correlation to RF Breakdown Events
摘要：
满足下一代直线对撞机（NLC）设计要求的X波段加速器结构已经被发现在处理到高电场梯度时遭受由射频（RF）击穿引起的真空表面损伤。对这些击穿事件的更好的理解对于最小化结构损伤的结构设计、制造过程和处理技术的发展是期望的。射频反射波分析和声学传感器拾取提供了射频结构中的故障定位。四个RF处理的行波结构的干净尸检后发现的颗粒污染，已被编目和分析。它们对RF击穿的影响，以及其他几种基于材料的属性，将被讨论。
英文摘要：
X-band accelerator structures meeting the Next Linear Collider (NLC) design requirements have been found to suffer vacuum surface damage caused by radio frequency (RF) breakdown, when processed to high electric-field gradients. Improved understanding of these breakdown events is desirable for the development of structure designs, fabrication procedures, and processing techniques that minimize structure damage. RF reflected wave analysis and acoustic sensor pickup have provided breakdowns localization in RF structures. Particle contaminations found following clean autopsy of four RF-processed travelling wave structures, have been catalogued and analyzed. Their influence on RF breakdown, as well as that of several other material-based properties, will be discussed.
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