One-mile equivalent length interferometric pendulum for seismic noise reduction
- 1 June 1986
- journal article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 57 (6) , 1145-1151
- https://doi.org/10.1063/1.1138618
Abstract
We describe the performances of a 100-kg, 1-m-long active pendulum provided with a reference arm to get rid of the effects of tilting of the ground. The pendulum displacement with respect to the suspension point is measured interferometrically. The phase signal, to be sent to the actuator which displaces the suspension point, is extracted from the interferometer using an analog phase follower. At 10 Hz we obtain a virtual pendulum length of 1.7 km with the reference arm locked and 1.2 km when the reference arm is free. This device can be used to reduce the seismic noise in an antenna for low-frequency gravitational wave detection.Keywords
This publication has 3 references indexed in Scilit:
- Performance of an analog phase followerReview of Scientific Instruments, 1986
- Vibration isolation for broadband gravitational wave antennasReview of Scientific Instruments, 1984
- Passive and active seismic isolation for gravitational radiation detectors and other instrumentsJournal of Physics E: Scientific Instruments, 1982