| 2 | Study on the 1.3 GHz low loss shape superconducting cavities at IHEP显示文摘As part of the international research program on the superconducting cavity for the International Linear Collider(ILC) R&D on the 1.3 GHz low loss superconducting cavities has been carried out at the Institute of High Energy Physics(IHEP) since 2005.A design of 1.3 GHz low loss cavity shape was proposed and six single-cell cavities of different niobium material were successfully fabricated with standard technology.In this study our priority was on large grain(LG) cavities.The two LG cavities were treated with complete procedures of surface treatments based on chemical polishing(CP) without electro polishing(EP) at IHEP.The two LG cavities and a fine grain cavity were sent to KEK for vertical testing.All the three cavities reached accelerating gradients higher than 35 MV/m and the maximum gradient of 40.27 MV/m was achieved in the LG cavity.This paper presents the process of the vertical RF tests and the comparison of the LG and fine grain cavities's performance. | 宗占国 高杰 谷俊 孙虹 赵发成 葛明骐 徐庆金 翟纪元 袁鸿 陈晋哲 颉维平 K.Saito F.Furuta T.Saeki 刘立强 张亮 | 2009 | Chinese Physics C2009，33，6： | 1 |
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