LIGO Document G1501275-v2

Gravitational Wave Experiments

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In the centennial of the theory of general relativity, global network of advanced gravitational wave detectors is rapidly coming into reality. After a hiatus from earlier observational runs using initial, or first-generation, instruments, Advanced LIGO started its first observational run with second-generation instruments at unprecedented sensitivity in September 2015, and Advanced Virgo is expected to become fully operational in 2016. Construction of KAGRA underground detector is underway and they expect the first operation with minimal configuration in 2016. We are confident that these detectors will open a new window for astronomy in the next few years.

In this talk, I will review the status of gravitational wave experiments with heavy emphasis on the interferometric detectors. Efforts in the past, current state-of-the-art instruments, and future plans are discussed in relation to the sensitivity limits posed by various noise sources and how we tackle them.

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