Two-Sapphire-Rod-Resonator Method to Measure the Surface Resistance of High- T c Superconductor Films
Two-Sapphire-Rod-Resonator Method to Measure the Surface Resistance of High- T c Superconductor Films
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发表时间：
2004-05
影响因子：
0.5
通讯作者：
Toru Hashimoto;Yoshio Kobayashi
中科院分区：
文献类型：
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作者：
Toru Hashimoto;Yoshio Kobayashi
根据IEC/TC 90/WG 8高温超导薄膜表面电阻Rs的标准测量方法，提出了三种类型的蓝宝石棒谐振器：开放型、腔型和封闭型。为了将用于Rs测量的TE 011和TE 013模式与其他模式分开，考虑到蓝宝石的单轴各向异性特性，根据基于模式匹配方法的严格分析计算的模式图确定了这三个谐振器的适当尺寸。比较了开放式谐振腔和封闭式谐振腔。对于开路型，TE 011和TE 013模的无载Q值都被漏态TM 310模的辐射降低。最后，通过实验验证了设计和双三杆谐振腔方法的有效性。关键词：双蓝宝石棒谐振器法，表面电阻，高温超导体，开放式，腔式，封闭式，模式图
Precise designs are presented for sapphire rod resonators of three types, which have been proposed by the IEC/TC90/WG8 in the standard measurement method of the surface resistance Rs of high-Tc superconductor (HTS) films; an open-type, a cavity-type and a closed-type. In order to separate TE011 and TE013 modes, which are used in Rs measurements, from the other modes, appropriate dimensions for these three resonators are determined from mode charts calculated from a rigorous analysis based on the mode matching method, taking account of an uniaxialanisotropic characteristic of sapphire. Comparison of the open-type resonator with the closed-type is performed. For the open-type, the unloaded Q values of both the TE011 and TE013 modes are reduced by radiations of a leaky state TM310 mode. Finally, validity of the design and a two-sapphirerod-resonator method will be verified by experiments. key words: two-sapphire-rod-resonator method, surface resistance, highTc superconductor, open-type, cavity-type, closed-type, mode chart