AI Article Synopsis
- - The thermal compensation system (TCS) in Advanced LIGO (aLIGO) is designed to reduce thermal distortions in the interferometer’s optical modes and correct static curvature errors.
- - The TCS includes ring heater actuators, spatially tunable CO laser projectors, and Hartmann wavefront sensors.
- - It successfully maintains a maximum residual error of 5.4 nm rms across the laser beam, even when handling up to 125 W of laser power.
Article Abstract
This is an overview of the adaptive optics used in Advanced LIGO (aLIGO), known as the thermal compensation system (TCS). The TCS was designed to minimize thermally induced spatial distortions in the interferometer optical modes and to provide some correction for static curvature errors in the core optics of aLIGO. The TCS is comprised of ring heater actuators, spatially tunable CO laser projectors, and Hartmann wavefront sensors. The system meets the requirements of correcting for nominal distortion in aLIGO to a maximum residual error of 5.4 nm rms, weighted across the laser beam, for up to 125 W of laser input power into the interferometer.
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