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AdV-TCS (CO2 laser projector)
paoletti, rocchi - 11:10 Thursday 09 February 2017 (36441) Print this report
Intervention on WI CO2 laser chiller

This morning, around 8:20 UTC, both CO2 lasers and chiller have been turned off. The operation allowed us to disconnect the cables of the WI chiller heater, that seems to be one of the responsibles for a comb noise in the RFC frequency noise (36012).

The WI laser and chiller have been turned on again around 8:36 UTC. The NI laser and chiller are still off, to check if the noise disappears in the INJ signals.

At present there is a communication problem (work in progress) with the WI chiller, that appeared as soon as the chiller was turned off.

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Comments to this report:
carbognani, rocchi - 12:47 Thursday 09 February 2017 (36443) Print this report

The comunication with the chiller is back

genin - 15:28 Thursday 09 February 2017 (36447) Print this report

It seem sthta the situation improved a lot...

Attached the PMC error signal and a zoom of the plot around the 50Hz line.

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