Virgo Logbook

Detector Operation (Operations Report)

menzione - 22:50 Wednesday 22 March 2017 (36985)

Operator report - afternoon shift 22/3

Upon arrival I found ITF in PR_ITF mode.
FmodErr tuning performed at 16:20 LT.

As planned Detection crew worked on reduce dynamics at ADC input to test B2 and B1p quadrants.
DAQ installation activity by Lapp crew from 17:30 to 21:45 LT.
TCS crew worked on NI CO2 laser from 18:30 to 21:00 LT.
Carbognani with E. Genin, connect EIB picomotors.

21:45 LT, ITF has been relocked in SSFS mode. Activity concluded at 22:45 LT.

VPM
Telescreen right crashed several times. Properly restarted.
18:50 LT FbmMainUsers restarted under request of Didier.
19:47 LT PC_Fb restarted.

Comments to this report:

bersanetti, allocca, menzione - 1:22 Thursday 23 March 2017 (36992)

FmodErr was done again at ~22:30 LT; given the trend of the last few days, it seems that the FmodErr procedure has to be done much more frequently that a couple of weeks ago.

genin, pillant - 17:32 Friday 24 March 2017 (37026)

We have readjusted the offset on the ML thermal correction output of the rampeauto to bring the laser frequency closer to the RFC fringe.

Now the MC end mirror displacement needed to find a resonance of the RFC should be of the order of 10 microns.

genin, pillant - 18:54 Friday 24 March 2017 (37028)

We have readjusted the offset on the ML thermal correction output of the rampeauto to bring the laser frequency closer to the RFC fringe.

We had also to change the set point of the temperature of the Master laser crystal from 20.9 to 20.4C (we observed again the bistable behaviour of the PMC as explained in the entry #36611).

Now the MC end mirror displacement needed to find a resonance of the RFC should be of the order of 10 microns.

mwas - 19:05 Friday 24 March 2017 (37030)

Changing the master laser temperature has changed slightly the position of the resonance for the OMC.
I have changed the OMC parking temperature from 22.56 degrees, to 22.60 degrees, so the OMC is parked slightly below the carrier TEM00.