Vibration Characteristics of a Continuously Rotating Superconducting Magnetic Bearing and Potential Influence to TES and SQUID
Vibration Characteristics of a Continuously Rotating Superconducting Magnetic Bearing and Potential Influence to TES and SQUID
复制标题
连续旋转超导磁力轴承的振动特性及对TES和SQUID的潜在影响
DOI：
10.1007/s10909-022-02846-1
复制
发表时间：
2022
影响因子：
2
通讯作者：
Terada Y.
中科院分区：
文献类型：
--
作者：
Sugiyama S.;Ghigna T.;Hoshino Y.;Katayama N.;Katsuda S.;Komatsu K.;Matsumura T.;Sakurai Y.;Sato K.;Takaku R.;Tashiro M.;Terada Y.
我们测量了液氮温度下运行的超导磁轴承（SMB）原型的振动。该原型系统被设计为LiteBIRD低频望远镜（LFT）偏振调制器单元的试验板模型。在旋转同步频率下，我们将振幅的上限设置为36。在旋转过程中，产生的磁场的幅度变化。从这个设置，我们计算的静态和交流振幅的磁场产生的SMB磁铁在LFT焦平面的位置为0.24和G，分别。从交流振幅出发，计算了热电子输运的临界温度变化K和量子干涉仪磁通的分数变化。在旋转机构位置处的机械振动也可以被估计为N。
We measured the vibration of a prototype superconducting magnetic bearing (SMB) operating at liquid nitrogen temperature. This prototype system was designed as a breadboard model for LiteBIRD low-frequency telescope (LFT) polarization modulator unit. We set an upper limit of the vibration amplitude at 36at the rotational synchronous frequency. During the rotation, the amplitude of the magnetic field produced varies. From this setup, we compute the static and AC amplitude of the magnetic fields produced by the SMB magnet at the location of the LFT focal plane as 0.24 andG, respectively. From the AC amplitude, we compute TES critical temperature variation ofK and fractional change of the SQUID flux is. The mechanical vibration can be also estimated to beN at the rotation mechanism location.