https://doi.org/10.1051/epjap:2007040
High mechanical Q-factor measurements on calcium fluoride at cryogenic temperatures
Friedrich-Schiller-Universität Jena, Institut für Festkörperphysik, Helmholtzweg 5, 07743 Jena, Germany
Corresponding author: ronny.nawrodt@uni-jena.de
Received:
1
September
2006
Accepted:
12
January
2007
Published online:
22
February
2007
Mechanical Q-factor measurements of single crystalline calcium fluoride CaF2 bulk material are presented. Resonant modes between 27 and 100 kHz were investigated on a cylindrical test sample (
). For selected modes low temperature measurements of the mechanical Q-factor were done within a temperature range from 5 to 300 K. For the Q-measurements a ring-down technique was used. The substrate was suspended as a pendulum by means of a tungsten wire loop. The highest Q-factor has been achieved around 60 K with 3 × 108 which is the highest Q-factor reported on CaF2 up to now.
PACS: 43.40.-r – Structural acoustics and vibration / 43.60.+d – Acoustic signal processing / 62.30.+d – Mechanical and elastic waves; vibrations / 04.80.Nn – Gravitational wave detectors and experiments
© EDP Sciences, 2007
