Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9844945 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment | 2005 | 9 Pages |
Abstract
This article describes a mechanical vertical attenuation system capable to provide large attenuation factors above 1Â Hz. This system is derived from, and improves, the passive Geometric Anti-Spring seismic attenuation filters minimizing their vertical resonant frequency by means of a tunable electromagnetic spring mounted in parallel with the main spring. The tunable spring is also used to compensate thermal drift in the new arrangement. We found an unexplained deviation from the 1/f2 transfer function at resonant frequencies below â¼100Â mHz.
Keywords
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Physical Sciences and Engineering
Physics and Astronomy
Instrumentation
Authors
Maddalena Mantovani, Riccardo DeSalvo,