Speaker
Mr
Raymond Robie
(University of Glasgow)
Description
Coating thermal noise is the limiting factor for detector strain sensitivity in the most sensitive frequency band. Future gravitational wave detectors are proposed to operate at cryogenic temperatures, where the mechanical loss of the low-index, amorphous silica coating layers is not well characterized and stands to be the dominant source of noise in the multi-layer mirror coating stack if amorphous silicon is found to be a viable replacement for the high-index layers (currently 25% Ti:Ta2O5). The low temperature mechanical loss of ion-beam sputtered silica is presented for a number of post-deposition heat treatments.
Primary author
Mr
Raymond Robie
(University of Glasgow)
Co-authors
Dr
Iain Martin
(University of Glasgow)
Prof.
James Hough
(University of Glasgow)
Dr
Peter Murray
(SUPA University of Glasgow)
Ms
Sheila Rowan
(University of Glasgow)
