Force measurements of a superconducting-film actuator for a cryogenic interferometric gravitational-wave detector
/ Authors
N.Sato, T.Haruyama, N.Kanda, K.Kuroda, S.Miyoki, M.Ohashi, Y.Saito, T.Shintomi, T.Suzuki, D.Tatsumi
and 4 more authors
/ Abstract
We measured forces applied by an actuator with a YBa 2 Cu 3 O 7 (YBCO) film at near 77 K for the Large-scale Cryogenic Gravitational-wave Telescope (LCGT) project. An actuator consisting of both a YBCO film of 1.6 µ m thickness and 0.81 cm 2 area and a solenoid coil exerted a force of up to 0.2 mN on a test mass. The presented actuator system can be used to displace the mirror of LCGT for fringe lock of the interferometer.