Measurements of mechanical Q in levitated paramagnetic crystals
- Creators
- Augst, S. J.
- Drever, R. W. P.
- Other:
- Meshokov, Sydney
Abstract
Thermal noise from test masses, arising both from internal noise in the test mass material and from losses in the suspension wires and their attachments, is a significant factor limiting sensitivity of interferometric gravity-wave detectors. To investigate ways of reducing these noise sources we are using magnetic levitation in place of suspension wires. A search for high-Q crystals with magnetic properties allowing tests in moderate field strengths has led us to paramagnetic crystals, and we report preliminary results with small levitated samples of Gadolinium Gallium Garnet (GGG) and Terbium Gallium Garnet (TGG). The technique seems the first to allow Q measurements with no mechanical contact, and may facilitate work aimed at reducing thermal noise.
Additional Information
©2000 American Institute of Physics. We would like to acknowledge valuable discussions with J. L. Hall and R.E. Cowen, and H. J. Kimble for some early material samples. This research is based upon work supported by the National Science Foundation under Grant number PHY-9722112, and the California Institute of Technology.Attached Files
Published - AUGaipcp00.pdf
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Additional details
- Eprint ID
- 2076
- Resolver ID
- CaltechAUTHORS:AUGaipcp00
- PHY-9722112
- NSF
- Caltech
- Created
-
2006-03-06Created from EPrint's datestamp field
- Updated
-
2021-11-08Created from EPrint's last_modified field
- Series Name
- American Institute of Physics Conference Proceedings
- Series Volume or Issue Number
- 523