Superconducting thin film spiral coils as low-noise cryogenic actuators

E. C. Ferreira, F. Bocchese, F. Badaracco, J. V. van Heijningen, S. Lucas, A. Perali

Research output: Contribution to journalMeeting abstract


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/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.

Original languageEnglish
Article number012080
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 21 Feb 2022
Event17th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2021 - Virtual, Online
Duration: 26 Aug 20213 Sept 2021


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