Hie-Isolde高β腔的研究与测量
Hie-Isolde High Beta Cavity Study and Measurements
摘要:
欧洲核子研究中心的ISOLDE设备的升级预见了基于两个间隙独立定相的Nb溅射四分之一波谐振器(QWR)的超导直线加速器,其工作频率为101.28MHz,轴上产生6 MV/m的加速场。为了确定该结构的关键电磁参数,如峰值场、品质因数和腔壁上的电磁功率,对腔中的场进行了仔细的研究。已开发出一种频率范围约为200 kHz的调谐系统,以应付制造公差。在本文中,我们将报告的空腔模拟。将描述调谐板设计。最后给出了在室温下对谐振腔原型的频率测量结果。
英文摘要:
The upgrade of the ISOLDE machine at CERN foresees a superconducting linac based on two gap independently phased Nb sputtered Quarter Wave Resonators (QWRs) working at 101.28MHz and producing an accelerating field of 6MV/m on axis. A careful study of the fields in the cavity has been carried out in order to pin down the crucial e-m parameters of the structure such as peak fields, quality factor and e-m power dissipated on the cavity wall. A tuning system with about 200kHz frequency range has been developed in order to cope with fabrication tolerances. In this paper we will report on the cavity simulations. The tuning plate design will be described. Finally the frequency measurements on a cavity prototype at room temperature will be presented.
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