Regensburg 2007 – scientific programme
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DS: Fachverband Dünne Schichten
DS 15: Poster Session
DS 15.33: Poster
Tuesday, March 27, 2007, 15:00–17:00, Poster B
Investigations of the mechanical loss of tantala films between 5 and 300 K — •Matthias Hudl1, Ronny Nawrodt1, Anja Zimmer1, Sandor Nietzsche1, Wolfgang Vodel1, Andreas Tünnermann2, and Paul Seidel1 — 1Friedrich Schiller University - Institute of Solid-State Physics, Helmholtzweg 5, D-07743 Jena, Germany — 2Friedrich Schiller University - Institute of Applied Physics, Albert-Einstein-Straße 15, D-07745 Jena, Germany
Mechanical losses in dielectric mirror coatings of interferometric gravitational wave detectors are a main issue for the proposed advanced generation of gravitational wave detectors. Recent investigations have shown that the mechanical loss of the dielectric mirror coatings (tantala/silica stacks) is probably the main contribution to the detector noise. There are indications that among both coating materials tantala gives the major contribute to mechanical loss. Experimental details of a measuring setup and investigations of the temperature dependency of the mechanical dissipation in thin tantala films on different substrates are presented.
This work is supported by the DFG under contract SFB TR7.