Ferreira, E.C.
Bocchese, F.
Badaracco, F.
van Heijningen, Joris
[UCL]
Lucas, S.
Perali, A.
We present results on actuator development for a cryogenic superconducting inertial sensor with a displacement sensitivity of a few ${\rm{fm}}/\sqrt{{\rm{Hz}}}$ 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/${\rm{fm}}/\sqrt{{\rm{Hz}}}$ 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
Bibliographic reference |
Ferreira, E.C. ; Bocchese, F. ; Badaracco, F. ; van Heijningen, Joris ; Lucas, S. ; et. al. Superconducting thin film spiral coils as low-noise cryogenic actuators. In: Journal of Physics: Conference Series, Vol. 2156, no.1, p. 012080 (2021) |
Permanent URL |
http://hdl.handle.net/2078.1/262190 |