%0 Journal Article
%T Studies on the improvement of niobium-sputtered quarter wave resonator supercond ucting cavity<br>改进铜铌溅射型QWR超导腔性能的探讨
%A Meng Tie-Jun
%A Zhao Kui
%A Xie Da-Tao
%A Zhang Bao-Cheng
%A Wang Li-Fang
%A Zhu Feng
%A Chu Xiang-Qiang
%A Chen Jia-Er
%A <br>孟铁军
%A 赵 夔
%A 谢大
%A 张保澄
%A 王莉芳
%A 朱 凤
%A 储祥蔷
%A 陈佳洱
%J 物理学报
%D 2003
%I 
%X Quarter wave resonator (QWR) is the best choice of the acceleration cavity for heavy ion superconducting accelerator. Using dc bias-voltage sputtering system, w e can sputter niobium films of several microns on the oxygen-free high-conductiv ity copper(OFHC) substrate. Good superconducting properties and acceleration pro perties of the cavity can be obtained. But compared with niobium cavity, it has very low Q and Eacc. Niobium nitride (NbN) is a good superconducto r, and it has a higher superconducting transition temperature (Tc) th an pu re niobium. Through experiments, we find that the Tc transition point of n iobium films rises to about 9.6K by using NbN interlayer between OFHC substrate and niobium films. So using this method can improve the superconducting properti es and thus the acceleration properties.
%K sputtering
%K QWR superconducting cavity
%K niobium nitride (NbN)
%K super conducting transition temperature<br>溅射，
%K QWR超导腔，
%K 氮化铌NbN，
%K 超导温度
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=F8BD386DD442E311&yid=D43C4A19B2EE3C0A&vid=286FB2D22CF8D013&iid=B31275AF3241DB2D&sid=6F185A924223F19E&eid=DEEC1AC3B6D3EB96&journal_id=1000-3290&journal_name=物理学报&referenced_num=1&reference_num=21