TY - JOUR
T1 - Vibration Characteristics of a Continuously Rotating Superconducting Magnetic Bearing and Potential Influence to TES and SQUID
AU - Sugiyama, S.
AU - Ghigna, T.
AU - Hoshino, Y.
AU - Katayama, N.
AU - Katsuda, S.
AU - Komatsu, K.
AU - Matsumura, T.
AU - Sakurai, Y.
AU - Sato, K.
AU - Takaku, R.
AU - Tashiro, M.
AU - Terada, Y.
N1 - Funding Information:
We acknowledge the World Premier International Research Center Initiative (WPI), MEXT, Japan for support through Kavli IPMU. This work was supported by JSPS KAKENHI Grant Numbers JP17H01125, 19K14732, 18KK0083, and JSPS Core-to-Core Program, A.Advanced Research Networks.
Funding Information:
We acknowledge the World Premier International Research Center Initiative (WPI), MEXT, Japan for support through Kavli IPMU. This work was supported by JSPS KAKENHI Grant Numbers JP17H01125, 19K14732, 18KK0083, and JSPS Core-to-Core Program, A.Advanced Research Networks.
Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
PY - 2022/12
Y1 - 2022/12
N2 - 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 36 μm at 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 and 3 × 10 - 5 G, respectively. From the AC amplitude, we compute TES critical temperature variation of 7 × 10 - 8 K and fractional change of the SQUID flux is δΦ / Φ | ac= 3.1 × 10 - 5. The mechanical vibration can be also estimated to be 3.6 × 10 - 2 N at the rotation mechanism location.
AB - 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 36 μm at 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 and 3 × 10 - 5 G, respectively. From the AC amplitude, we compute TES critical temperature variation of 7 × 10 - 8 K and fractional change of the SQUID flux is δΦ / Φ | ac= 3.1 × 10 - 5. The mechanical vibration can be also estimated to be 3.6 × 10 - 2 N at the rotation mechanism location.
KW - Cosmic microwave background
KW - Cryogenics
KW - Half-wave plate polarimetry
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U2 - 10.1007/s10909-022-02846-1
DO - 10.1007/s10909-022-02846-1
M3 - Article
AN - SCOPUS:85138297472
SN - 0022-2291
VL - 209
SP - 1088
EP - 1096
JO - Journal of Low Temperature Physics
JF - Journal of Low Temperature Physics
IS - 5-6
ER -