Surface Analysis of OFE-Copper X-Band Accelerating Structures and Possible Correlation to RF Breakdown Events.

Harvey, S. E. ; Le Pimpea, F. ; Kirby, R. E. ; Marcelja, F.

Technical Information Center Oak Ridge Tennessee

关键词: Accelerators;    Breakdown;    Radiofrequency systems;    Copper;    Surface analysis;   

RP-ID  :  DE2004826463

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 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.