Open AccessSuperconducting thin film spiral coils as low-noise cryogenic actuators
Author(s) -
E. C. Ferreira,
Florian Bocchese,
F. Badaracco,
J. V. van Heijningen,
Stéphane Lucas,
Andrea Perali
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2156/1/012080
Subject(s) - niobium , noise (video) , actuator , superconductivity , materials science , algorithm , physics , analytical chemistry (journal) , computer science , artificial intelligence , condensed matter physics , chemistry , chromatography , metallurgy , image (mathematics)
We present results on actuator development for a cryogenic superconducting inertial sensor with a displacement sensitivity of a few fm / Hz at 0.5 Hz. The first version will use niobium as sensor mechanics material. Niobium is sufficiently superconducting below 5 K allowing superconducting coils to form low-noise actuators as part of a force feedback sensing scheme. Future improvements include the use of silicon in combination with high temperature superconductors for even lower frequency fm/ fm / Hz performance. This device will be the world’s most sensitive low-frequency inertial sensor. Here, we focus on its actuator, which ensures low-noise performance below 5 Hz by decreasing the mechanical loss and therefore thermal noise.