Performance of an Ultra Low Frequency Folded Pendulum

David Blair, J.F. Liu, E.F. Moghaddam, L. Ju

Research output: Contribution to journalArticlepeer-review

58 Citations (Scopus)


A folded pendulum consisting of the sum of a conventional compound pendulum and an inverse pendulum can be tuned to create a pendulum with the dynamic response of a kilometre scale pendulum. Results are presented demonstrating the stability and Q-factor of the system down to a resonant frequency of 17 mHz. It can be scaled up to form a pre-isolation stage in the vibration isolation system for laser interferometer gravitational wave detectors.
Original languageEnglish
Pages (from-to)223-226
JournalPhysics Letters A
Publication statusPublished - 1994


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