LIGO Document G1401058-v1

ALS Challenge: Study of the Green Laser Transmitted Power Decay

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The power of the green laser (532nm wavelength) transmitted through the x-arm cavity quickly decays after the interferometer locking loops are turned off (no locking activity), and no one knows why. Figuring out what causes this will help us understand the sources of alignment drift, which is important for the alignment and locking process.
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