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Studies on optical scattering from gravitational wave detector mirrors.

Glover L., DeSalvo R., Kells B., Pinto I. M.
  Lunedì 26/09   15:00 - 19:00   Edificio Psicologia 2 - Aula 2E   III - Astrofisica
Light scattering from the highly reflective coatings of gravitational wave detectors test masses are responsible for a large fraction of the stored-beam light losses, and ultimately affect the sensitivity and range of the detectors. Spatial and amplitude distribution studies of these scatterers on LIGO mirrors are reviewed, based on measurements made $in situ$ and on witness-samples, in an effort to identify common features of the scattering points, understanding the physics behind their formation, and finding strategies to reduce their effect.