LIGO Document G0900598-v1

Current Status and Future Plans for the LIGO Thermal Compensation System (TCS)

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High laser power creates strong thermal lensing in the interferometers optical resonant cavities used for gravitational wave detection. More demanding performance will require even higher amount of power stored in cavities. To be able to control the interferometer and achieve the stored power design, we require active wavefront correction systems to minimize the thermal lensing.
The increased laser power of Advanced LIGO will necessitate a TCS of much greater complexity than the current system.
We will discuss the recent improvement of the thermal compensation system in preparation for the next LIGO science run and the design of the thermal compensation scheme for Advanced LIGO.
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held on 21 Jun 2009 in Columbia U, New York City

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