Angular control of optical cavities in a radiation-pressure-dominated regime: the Enhanced LIGO case
Angular control of optical cavities in a radiation-pressure-dominated regime: the Enhanced LIGO case
We describe the angular sensing and control (ASC) of 4 km detectors of the Laser Interferometer Gravitational-Wave Observatory (LIGO). Enhanced LIGO, the culmination of the first generation LIGO detectors, operated between 2009 and 2010 with about 40 kW of laser power in the arm cavities. In this regime, radiation-pressure effects …