Experimental study on SC RF cavities by using China large grain niobium for ILC  

作　　者：宗占国 高杰 K. Saito 徐庆金 F. Furuta Y. J. Shim T. Saeki H. Inoue 翟纪元 葛明骐 谷俊 刘立强 张亮 

机构地区：[1]Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China [2]Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China [3]Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibavaki-305-0801, Japan [4]Department of Physics, Pusan National University, Korea [5]Graduate University of Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Chinese Physics C》2008年第2期151-155,共5页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (10525525)

摘　　要：Large grain niobium has the potential of simplifying the production sequence and consequently reducing the cost of the superconducting RF cavities for ILC. To investigate the feasibility of fabrication and the possibility to achieve high gradient by large grain cavities, two 1.3 GHz cavities were made of China large grain niobium and a series of vertical tests were carried out following several different surfaces treatment procedures. Two cavities have both reached the high gradient of more than 43 MV/m repeatedly and the maximum accelerating field of 47.9 MV/m has been achieved by China large grain niobium. This paper introduces the features of the fabrication and surface treatments on the large grain cavities and presents the preliminary results of the research.Large grain niobium has the potential of simplifying the production sequence and consequently reducing the cost of the superconducting RF cavities for ILC. To investigate the feasibility of fabrication and the possibility to achieve high gradient by large grain cavities, two 1.3 GHz cavities were made of China large grain niobium and a series of vertical tests were carried out following several different surfaces treatment procedures. Two cavities have both reached the high gradient of more than 43 MV/m repeatedly and the maximum accelerating field of 47.9 MV/m has been achieved by China large grain niobium. This paper introduces the features of the fabrication and surface treatments on the large grain cavities and presents the preliminary results of the research.

关 键 词：ILC superconducting RF cavity large grain niobium 

分 类 号：O572[理学—粒子物理与原子核物理]