Reports of 41393
Virgo Runs (O3)
magazzu - 6:55 Tuesday 21 May 2019 (45928) Print this report
Operator Report - Night Shift 20 May 2019

The ITF kept the Science mode for the whole shift. The Horizon had suffered some sporadic drops during the night.

Guard Tour
22:14 UTC - 22:43 UTC
0:11 UTC - 0:39 UTC
2:08 UTC - 2:39 UTC
4:06 UTC - 4:36 UTC

Images attached to this report
Virgo Runs (O3)
Montanari - 23:04 Monday 20 May 2019 (45927) Print this report
Operator Report - Afternoon Shift May 20

ITF found in Science Mode and kept the lock for the whole shift.
The Horizon had suffered a series of drops during the shift.

Guard Tours
17:32UTC - 18:06UTC
19:38UTC - 20:10UTC

Images attached to this report
AdV-SAT (Suspension control upgrade)
Boschi - 17:35 Monday 20 May 2019 (45926) Print this report
Comment to O3 DSP Software Status (45496)

A new commit of the DSP Code has been performed (revision 1314) and tagged as 'O3_4'. This version should be used for data acquired after May 13th at 10:07 UTC.

Virgo Runs (O3)
Nenci - 15:02 Monday 20 May 2019 (45925) Print this report
Operator Report - Morning Shift

This morning I found the ITF locked, unfortunatly after a few minutes (at 5:15 UTC) the DMS showed that the temperature inside one crate at the NE (Daq_NEB_ADC_Moni1) was out of threshold (picture attacched). The ITF unlocked once at 05:38 UTC.

Downtime events

6:00 - 7:30 UTC / TROUBLESHOOTING MODE - I found a fan of the LAPP crate broken, therefore following the instructions of the expert oncall I exchanged the crate with a spare one, unfortunately the first spare that I took from the Central Building was not working, instead the second one worked fine and allowed me to replace successfully all the boards that have been not damaged from this failure. NB: no more working spare of this crate available on site.

Images attached to this report
Virgo Runs (O3)
Gherardini - 6:54 Monday 20 May 2019 (45924) Print this report
Operator report - night shift 19/5
The ITF kept the science mode all the night.

- guard tours(UTC)
22:15 --> 22:45
0:35 --> 1:05
2:30 --> 3:05
4:10 --> 4:45
Virgo Runs (O3)
masserot - 23:19 Sunday 19 May 2019 (45922) Print this report
Comment to Operator Report - Morning Shift May 19 (45921)

Here the list of the TolmFrameBuilder where the event occured this morning

  • Inj_Fb(rtpc2): 2019-05-19-06h00m57-UTC>ERROR..-[TolmFrameBuilderFrontEnd] Rtai DAQ FIFO overrun -> fifo is reset
  • SIB2_Fb(rtpc7): 2019-05-19-06h00m47-UTC>ERROR..-[TolmFrameBuilderFrontEnd] Rtai DAQ FIFO overrun -> fifo is reset
  • SDB2_Fb(rtpc7): 2019-05-19-06h00m42-UTC>ERROR..-[TolmFrameBuilderFrontEnd] Rtai DAQ FIFO overrun -> fifo is reset
  • SNEB_Fb(rtpc8): 019-05-19-06h00m45-UTC>ERROR..-[TolmFrameBuilderFrontEnd] Rtai DAQ FIFO overrun -> fifo is reset
Virgo Runs (O3)
magazzu - 22:58 Sunday 19 May 2019 (45923) Print this report
Operator Report - Afternoon Shift 19 May 2019

ITF found in Science mode. The lock was kept for the whole shift and survived an earthquake ( M 6.2 - 163km E of Tadine, New Caledonia ).
ITF left locked.

Guard Tour
13:42 UTC - 14:21 UTC
15:38 UTC - 16:13 UTC
17:41 UTC - 18:15 UTC
19:38 UTC - 20:14 UTC

Virgo Runs (O3)
Montanari - 15:03 Sunday 19 May 2019 (45921) Print this report
Operator Report - Morning Shift May 19

ITF found in Science Mode.
At 06:00UTC, it unlocked as result of missing data, relocked at first attempt, Science Mode at 06:20UTC. The Horizon had suffered a series of drops during the shift.
ITF left in Science.

Guard Tours
05:10UTC - 05:37UTC
07:07UTC - 07:37UTC
09:32UTC - 10:01UTC
11:24UTC - 11:56UTC

Images attached to this report
Comments to this report:
masserot - 23:19 Sunday 19 May 2019 (45922) Print this report

Here the list of the TolmFrameBuilder where the event occured this morning

  • Inj_Fb(rtpc2): 2019-05-19-06h00m57-UTC>ERROR..-[TolmFrameBuilderFrontEnd] Rtai DAQ FIFO overrun -> fifo is reset
  • SIB2_Fb(rtpc7): 2019-05-19-06h00m47-UTC>ERROR..-[TolmFrameBuilderFrontEnd] Rtai DAQ FIFO overrun -> fifo is reset
  • SDB2_Fb(rtpc7): 2019-05-19-06h00m42-UTC>ERROR..-[TolmFrameBuilderFrontEnd] Rtai DAQ FIFO overrun -> fifo is reset
  • SNEB_Fb(rtpc8): 019-05-19-06h00m45-UTC>ERROR..-[TolmFrameBuilderFrontEnd] Rtai DAQ FIFO overrun -> fifo is reset
Virgo Runs (O3)
Gherardini - 6:55 Sunday 19 May 2019 (45920) Print this report
Operator report - night shift 19/5
The ITF kept the lock all the shift surviving at this earthquake:

M 6.2 - 195km E of Tadine, New Caledonia
2019-05-19 01:23:27 (UTC)

science mode stopped from 2:55UTC to 2:56UTC because of squeezer pump phase reset.

- guard tours(UTC)
22:15 --> 22:50
0:25 --> 1:00
2:35 --> 3:05
4:10 --> 4:40
Virgo Runs (O3)
magazzu - 22:57 Saturday 18 May 2019 (45919) Print this report
Operator Report - Afternoon Shift 18 May 2019

ITF found in Commissioning Mode. The SQZ activity was concluded at 15:57 UTC (see entry #45918), after that I switched to Science Mode. The only interruption was from 19:33 UTC to 19:35 UTC, caused by the squeezer pump reset.
ITF left locked.

ACS
ACS DET switched to "Portata Nominale" from 14:12 UTC to 14:55 UTC to allow the alignment activity on the Squeezing Bench.

Guard Tour
15:07 UTC - 15:38 UTC
17:10 UTC - 17:43 UTC
19:16 UTC - 19:46 UTC

AdV-AEI Squeezer Integration (General)
mehmet, vahlbruch, vardaro, zendri - 18:12 Saturday 18 May 2019 (45918) Print this report
Squeezing commissioning shift

During this shift we perform a re-alignment of the squeezer and after that we measure the squeezing and anti squeezing level at different pump phase powers.

For eacg point we perform:

  • a phase scan 240s of shot noise, 180 deg of phase scan with steps of 1deg and 3 seconds for each steps
  • 10 minutes of squeezing injection
  • 10 minutes of anti-squeezing injection

Point 1 (figure 1)

  • OPA pump power = 1.9mW
  • Sqz = -2.42 dB
  • Asqz = 4.23 dB
  • GPS shot noise: 1242206578
  • GPS start scan: 1242206818
  • GPS stop scan: 1242207372
  • Sqz - Mag distance = -0.135 rad
  • Dither demod phase = 5.2 rad
  • Min mag phase = 0.92 rad
  • SQZ phase = 0.8 rad
  • Asqz_phase = 2.478 rad 
  • SQZ GPS = 1242208221  18 May 2019 09:50:03 UTC
  • ASQZ GPS = not performed (problem into OPO lock)

 

Point 2 (figure 2)

  • OPA pump power = 2.8mW
  • SQZ = -2.79 dB
  • Asqz = 5.18 dB
  • GPS shot noise: 1242209895
  • GPS start scan: 1242210136
  • GPS stop scan: 1242210690
  • Sqz - Mag distance = -0.135 rad  
  • Min mag phase = 0.89
  • SQZ phase = 0.733 rad
  • ASQZ Phase = 2.496 rad
  • SQZ GPS = 1242211334  18 May 2019 10:41:56 UTC
  • ASQZ GPS = 1242211990  18 May 2019 10:52:52 UTC
  • End measurement = 1242212583  18 May 2019 11:02:45 UTC

From here we reduce the shot noise of each steps from 240s to 60, because before the scan the ITF was in low noise 3 thus the shot noise reference was automatically taken during the operation of the squeezer

Point 3 (figure 3)

  • OPA pump power = 4.4mW
  • Sqz = -2.96 dB
  • Asqz = 6.68 dB
  • GPS shot noise: 1242213670
  • GPS start scan: 1242213730
  • SQZ phase = 0.7854 rad
  • ASQZ phase = 2.513 rad
  • SQZ GPS = 1242214691  18 May 2019 11:37:53 UTC
  • ASQZ GPS = 1242215435  18 May 2019 11:50:17 UTC
  • End measurement = 1242216035  18 May 2019 12:00:17 UTC

Point 4 (figure 4)

  • OPA pump power = 6.3mW
  • Sqz = -3.25 dB
  • Asqz = 8.46 dB
  • GPS shot noise: 1242216765
  • GPS start scan: 1242216825
  • GPS stop scan: 1242217378.51
  • Sqz - Mag distance = -0.228160360316577
  • Min mag phase = 1.012 rad
  • SQZ phase = 0.7854 rad
  • ASQZ phase = 2.583 rad 
  • SQZ GPS = 1242217846  18 May 2019 12:30:28 UTC
  • ASQZ GPS = 1242218571  18 May 2019 12:42:33 UTC
  • End measurement = 1242219172  18 May 2019 12:52:34 UTC

Analysis (figure 5): 

From the plot in figure 5 we can derive an optical loss for the squeezing of 30% and a phase noise which seems to be non-stationary but in the range between 120-150mrad. For the first three points a phase noise of 150mrad agreed well, for the 6.3mW pump power measurement a phase noise level of 120mrad fits better…This seems to be the main limitation for detecting higher squeezing levels at the moment.

 

After that we try to increase the squeezing level acting on the coherent control loop gain. We reduce it from 55 to 20, the RMS of the in loop and out of loop error signal was decreased (figure 6):

  • In loop (B1 PD1): from 1.6e-4 V to 8.2e-5 V, i.e a factor 2
  • Out of loop (B1 PD2): from 4.9 e-15 V 2.6e-15 V, i.e a factor 1.9

After that we reperform a phase scan (figure 7) but near the maximum of the anti-squeezing the CC loop oscillated:

  • Shot noise:  1242220187.98 (4 mins)
  • Phase scan:  1242220428.1

We found a squeezing level comparable to the previous, i.e. -3.25 dB, thus acting on the CC gain seem not useful to decrease the phase noise. 

After this work we performed other OPA alignment into the DET lab and finally we re-perform a phase scan

Final position (figure 8)

  • Squeezing Level 3.0 dB
  • Anti-squeezing Level 6.0 dB
  • Squeezing phase = 0.3 rad
  • CC loop slow set = 0.5e-3 V
  • GPS phase scan: 1242227728 (4 min shot noise before)
Images attached to this report
Virgo Runs (O3)
menzione - 14:51 Saturday 18 May 2019 (45917) Print this report
operator report - morning shift

Upon arrival, ITF was in Science Mode with HrecBNS ~48 Mpc
At 06:05 UTC started the planned SQZ activity on check of the alignment status.
In order to allow the activity, at 06:10 UTC, according with the crew, I:
1. exit from Science Mode
2. set Commissioning Mode
3. set ITF in Locked step
4. set True on sqz_debug line in ITF_LOCK.ini
5. put UTA DET in Portata Nominale
6. upon concluded the hardware activity in Det Lab (08:38 UTC) I put UTA DET again in Portata Ridotta.
7. set False on sqz_debug line in ITF_LOCK.ini
8. set again Low_Noise_3_SQZ
      points 3, 4, 7, 8 performed several times under request of the crew.

Activity in Control room on phase noise and loss budget started at 08:45 UTC and still in progress.

During the whole SQZ activity, ITF remained locked.

DMS / DetChar
at 08:47 UTC I stopped/restarted ITFOperationsDMS from VPM (Hrec_RANGE_BNS grey flag on DMS).

Virgo Runs (O3)
berni - 6:54 Saturday 18 May 2019 (45916) Print this report
operator report - night shift
ITF found in Science mode.
At 00:31 Science mode was interrupted for about 1 minute because of the squeezer pump reset.
Hrec_Raange_BNS oscillating from 46Mpc to 49Mpc with many glitches around 150 Hz .
ITF left in Science mode.

Guard tours (time in UTC)
from 22:45 to 1:16
from 0:30 to 1:00
from 2:40 to 3:10
from 4:06 to 4:40
Images attached to this report
Virgo Runs (O3)
Gherardini - 23:01 Friday 17 May 2019 (45915) Print this report
Operator report - afternoon shift 17/5
The ITF kept the science mode all the shift.

-ISC
the ITF is locked with the BS AA in drift control, the AA in full-bandwidth is still disabled also in the automation.

-guard tour(UTC
17:35 --> 18:10
19:35 --> 20:05
Detector Characterisation (Glitches)
swinkels - 15:18 Friday 17 May 2019 (45914) Print this report
Comment to glitches around 150 Hz (45871)
These glitches are likely related to the full-bandwidth control of the BS, which in the last days was switched off, then on, and finally off again. As already shown in Maddalena's presentation at the weekly meeting (page 3), this increased the number of glitches. Fig 1 shows the clear correlation between the switch and the drops in the horizon and the recycling gain of the sidebands, and the flashes on the dark fringe.

Fig 2 shows a zoom on one of the glitches, which shows that for whatever reason, there is a glitch on the local control signals of the BS (which are in loop if the full-bandwidth AA is switched off). A short moment later, this causes a drop in the sideband power and a brightening of the dark fringe, which is then followed by a glitch in DARM. To be understood by the experts if this instability is somehow caused by the bad working point of the interferometer (which prevents the AA loop to be closed in the first place), or that this is a problem with the local controls that can be resolved.
Images attached to this comment
Virgo Runs (O3)
magazzu - 14:58 Friday 17 May 2019 (45913) Print this report
Operator Report - Morning Shift 17 May 2019

ITF found in Science Mode, it kept the lock for the whole shift. The Horizon had suffered a series of drops (see attached plot).
ITF left locked.

ISC
The ITF is locked with the BS AA in drift control and is still disabled also in the automation.

Images attached to this report
Environmental Monitoring (Environmental Monitoring)
masserot - 10:47 Friday 17 May 2019 (45912) Print this report
Comment to Installation of the electronic pipeline for the tiltmeter in NEB (45908)

The ENV_NE Tiltmeter channls are correctly received by the SUSP_Fb TolmFrameBuilder since 

  • 2019-05-14-09h07m56-UTC>INFO...-[TolmFrameBuilderSource::SetUp] New source ENV_NE (v1) with GPS time: 1241860094.000102519

and available on all the data streams (RAW, RAW_FULL,RDS and TREND)

 

Images attached to this comment
Environmental Monitoring (Environmental Monitoring)
C. Magazzu, A. Gennai - 9:06 Friday 17 May 2019 (45911) Print this report
Comment to Installation of the electronic pipeline for the tiltmeter in NEB (45908)

Actually what we installed is a standalone UDSPT board (see attached photo). Analog i/o was connected to tiltmeter front-end electronic. Optical link was connected to mux/demux sn24, ch. 3. Board power supply was connected to Suspension Control System PDU (Port#3). Dictionary data prefix is set to ENV_NE. Tolm packet routing is set to 0xf94c000. We check proper connection of analog i/o. Connection with timing distribution was validated while DAQ connection test is pending (we are now sending 6 signals).

Images attached to this comment
Virgo Runs (O3)
berni - 6:56 Friday 17 May 2019 (45910) Print this report
operator report - morning shift
ITF in Science mode for all the shift; many drops in the Horizon.

Guard tours (time in UTC)
from 22:13 to 22:47
from 0:10 to 0:45
from 2:10 to 2:43
from 4:06 to 4:40
Images attached to this report
Virgo Runs (O3)
Gherardini - 22:58 Thursday 16 May 2019 (45909) Print this report
Operator report - afternoon shift 16/5
The ITF kept the science mode all the shift.

-ISC
the ITF is locked with the BS AA in drift control, the AA in full-bandwidth is still disabled also in the automation.

-guard tour(UTC
17:30 --> 18:00
Environmental Monitoring (Environmental Monitoring)
errico, calloni, derosa, gennai, sentenac - 18:29 Thursday 16 May 2019 (45908) Print this report
Installation of the electronic pipeline for the tiltmeter in NEB
During Tuesday morning (May 14) we installed all the electronic pipeline for the data acquisition of the tiltmeter in NEB. We verified the functioning of the data acquisition sending a signal to the DAC and injecting it in a ADC at the front end panel near the tiltmeter. We also installed an Ethernet RS232 bridge near the tiltmeter to control by remote two DC motors.
Comments to this report:
C. Magazzu, A. Gennai - 9:06 Friday 17 May 2019 (45911) Print this report

Actually what we installed is a standalone UDSPT board (see attached photo). Analog i/o was connected to tiltmeter front-end electronic. Optical link was connected to mux/demux sn24, ch. 3. Board power supply was connected to Suspension Control System PDU (Port#3). Dictionary data prefix is set to ENV_NE. Tolm packet routing is set to 0xf94c000. We check proper connection of analog i/o. Connection with timing distribution was validated while DAQ connection test is pending (we are now sending 6 signals).

Images attached to this comment
masserot - 10:47 Friday 17 May 2019 (45912) Print this report

The ENV_NE Tiltmeter channls are correctly received by the SUSP_Fb TolmFrameBuilder since 

  • 2019-05-14-09h07m56-UTC>INFO...-[TolmFrameBuilderSource::SetUp] New source ENV_NE (v1) with GPS time: 1241860094.000102519

and available on all the data streams (RAW, RAW_FULL,RDS and TREND)

 

Images attached to this comment
Virgo Runs (O3)
magazzu - 15:01 Thursday 16 May 2019 (45906) Print this report
Operator Report - Morning Shift 16 May 2019

ITF found in Science Mode, during this period the Horizon suffered a series of drops ( see #1 plot ). It unlocked at 9:52 UTC due to a Fast unlock ( see #2 plot), I was able to reach LOW_NOISE_3_SQZ afterward but unlocked twice after a short period ( locks from 10:32 UTC to 10:37 UTC and from 10:56 UTC to 11:24 UTC ). Science Mode reached stably again at 11:45 UTC.
ITF left locked.

Images attached to this report
Virgo Runs (O3)
gosselin - 10:14 Thursday 16 May 2019 (45905) Print this report
Comment to operator report - afternoon shift (45901)

I have been acting on the master laser. First by resetting the noise heater (off then on again) and then by decreasing the current of the pumping diodes from 1.792 A to 1.772 A. The output power decreased from about 530 mW to 500 mW (see the attached plot). This does not impact the slave loop so much but reduces the number of possible glitches from the master laser. 

Images attached to this comment
IT infrastructure (Data Storage)
salconi - 8:39 Thursday 16 May 2019 (45904) Print this report
Circular buffer deletion: v04 v05 v06 v07on May 20th
on May, 2oth the following rawdata volumes will be deleted in order to make space for new files:

v04
v05
v06
v07

that will involve data from:
GPS: 1224680700 27 Oct 2018 13:04:42 UTC (27 Oct 2018 15:04:42 CEST)
to:
GPS: 1225746700 08 Nov 2018 21:11:22 UTC (08 Nov 2018 22:11:22 CET)
Virgo Runs (O3)
Nenci - 6:56 Thursday 16 May 2019 (45903) Print this report
Operator Report - Night Shift

ITF found in relocking state. Unfortunatly the sensitivity was still very bad (Hrec_Range_BNS around 15 Mpc) therefore I contacted L. Rolland, because I was wondering that this behavior was related to the calibrations done in the afternoon. After further investigation he discovered that the relay of NE was not properly switched off, from PCal_NE_Relay process (see the entry #45901). After that we recovered the Science Mode and during the night the ITF unlocked once at 2:42 UTC (fast unlock), Science Mode recovered at first attempt 3:11 UTC Hrec_Range_BNS around 49 Mpc.

Downtime events
21:45 UTC - 22:11 UTC -  TROUBLESHOOTING MODE in order to solve the problem of the bad sensitivity.

Oncall events (time in UTC)
from 21:15 to 21:45 UTC L. Rolland on call from phone because of switching of Coil Relay not working; solved. 

Guard Tour UTC
21:15  - 21:52
00:15  - 00:47
02:31  - 03:04
04:1 0  - 04:40

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