Virgo Logbook

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AdV-TCS (Subsystem management)

gherardini - 13:59 Saturday 11 November 2017 (40010)

WI laser switch-off

This morning at 11:56utc the WI CO2 laser had been switched off by the over temperature protection (see plot), I came on site to check the status of the system: the WI chiller was complaining about "motor fault" so I put the system in safety condition: RF driver unplugged and chiller switched off.

Images attached to this report

40010_20171111135900_20171111135842meantcswiteco2laser10.png

Comments to this report:

rocchi - 23:41 Sunday 12 November 2017 (40013)

Here is a plot of the last moments before the shutdown. From the time behavior of the power, it seems the problems started around 11:00 UTC.

Images attached to this comment

Ciardelli Menzione Nardecchia Rocchi - 16:06 Tuesday 14 November 2017 (40035)

This morning we have replaced the WI broken chiller with the new one.

We have also profitted of this intervention to perform a maintenance of the cooling systems of both CO2 lasers (filter cleaning...).

At present both CO2 lasers are ON at full power.