DRAFT - REPORT IN PROGRESS - will be finalized at the end of the shift
ITF found in LOW_NOISE_3 and in Science Mode. ITF still locked.
ITF found in LOW_NOISE_3 in SCIENCE mode (AUTOSCIENCE_ON).
ITF unlocked at 22:24 UTC due to end TM (MIR or MAR) correction saturation. Autorelocked at first attempt. SCIENCE mode at 23:14 UTC.
02:54 UTC - S250326y
Guard tours (UTC):
22:19 - 22:50
23:15 - 23:50
01:50 - 02:25
04:35 - 05:10
ITF found in Commissioning mode for the planned SQZ activity.
After the unlock occurred at 14:12 UTC DET_MAIN node went in "unknown" state; the usual procedure did not work thus I contacted the DET on-call and from remote fixed the problem. In the subsequent lock acquisition the OMC slow shutter did not open after CARM_NULL_1F; again I contacted the DET on-call who fixed the problem.
The commissioning activity was concluded at 19:09 UTC; after two failed attempts (ITF unlocked twice while locking the OMC) the ITF was back in Science mode at 20:47 UTC.
The FCIM suspension crate was switched off today during the affternoon shift in preparation for the activity that will happen in two weeks
Also SC PLL is revovered.
To recover it I switched on the GUI not based on pyserver users/vardaro/Documents/Sources/GUI_Tools/OPA_PLL/pll.py from the PC phasecam1
Once the GUI was on I switched on the process and it restarted to work
Today I did an inspection of the hardware needed for testing the temperature control of the SQB1 FIs. Results
1)The cable for the peltier is connected to an SQB1 flange, black and thick cable in "SQB1Flange.jpg"
2) The cable enters the EE room where it splits. "Cable.jpg"
3)the split cables go partly to a Newport driver (grey box in the photo) used to move the HWPs and partly to 9 pin D-Sub connectors to be pluged in the peltier controlers "Newportbox.jpg". I found the Newport driver lying on the floor Now I have placed it in the "Armadio A2" rack
4) A possible place to install the peltier driver is the "Armadio A3" rack. This rack contains TCS devices but we have Ilaria's permission to use it. Under the controller there should be a place to install the Rodhe&Schwartz DC power supply to power the driver. "Rack2.jpg". The DC power supply was not installed because the person who took charge of it is on vacation. It will be installed upon his return.
5) The DAQ boxes (4 ADC +2 DAC) to which connect the drivers could be those in the rack next to the driver (Armadio A2) "Tworacks.jpg" and "DAQBox1.jpg""The cables to go from the DAQ boxes to the drivers have be made. An alternative could be to use the DAQ boxes "DAQBoxe2.jpj" but they are installed 4 racks away from the driver.
I did not find any cable going from the EE det room to the Detlab for the EQB1 Faraday. A more systematic search will be done in the future. Otherwise a dedicated cable will have to be made
Finally with the support of Marco Vardaro I turned off the FCIM mirror controls.
Also SC PLL is revovered.
To recover it I switched on the GUI not based on pyserver users/vardaro/Documents/Sources/GUI_Tools/OPA_PLL/pll.py from the PC phasecam1
Once the GUI was on I switched on the process and it restarted to work
Today we realigned the EQB1 HD Detecor with both delay line and SQB1 retoreflector
Preliminary activities
- Switch on all the EQB1 electronics with process EQB1_PDU1 and PDU3, PDU4 was not working so Jean-Pierre went in DET Lab to switch on the plug manually
- Open LO shutter and check shot noise level. 0dB as usual and 23 of clearence as usual
- Switch on SQZ_Rot process. We found a problem and we had to restart phasecam1 pc. After that the SC_PLL process is not switching on anymore. Further investigations will be performed
- Lock manually the squeezer with SQZ_CTRL process
- Rotate SQB1 HWP2 (ax1 ch2) to divert SQZ light toward HD
- Switch on again HD M6 dither lines M6X amplitude 0.002V M6Y almplitude 0.0015V
Check SQZ with Retroreflector
- we started with low level of SQZ 1 dB. After a while, in particular working on HD AA and SQB1 Retroreflector we manage to obtain
- SQZ angle 2.2 rad, level 5.8 dB @18:32:43 for two mins
- ASQZ angle 0.84 rad, level 8.5dB @18:29:26 for two mins
- Retroreflector moved by -30steps horizontally and -380steps vertically
Check SQZ with DL on EQB1
- once DL was switched on we realigned mainly using HD_DL_M4_X and with small adjustent also on M4_Y and M5_X and Y
- at the end of the alignment SQZ amgle 2.25 rad, level 6.7 dB at 15:55:21 2 mins
- ASQZ angle 0.78 rad level 8.8 dB at 17:58:17
- Shutter Open 8.75 mV max and 3.07 mV min, i.e. 9.1dB of generated SQZ
- SHOT reference at 18:05:11
We reverted all the modification and we switched off everything
We left SQZ diverted toward HD Detector
The DET on-call was contacted as the DET_MAIN node was stuck in the UNKNOWN state.
We checked that the OMC shutter was indeed closed by observing no light on the B1s camera.
Then we found a positive offset on the B1_PD3_DC signal. We corrected this offset at 14h43m41 UTC and then it was possible to restore the standard condition of DET_MAIN by asking for the sequence "FORCE_CHECK_CLOSED", followed by "SHUTTER_CLOSED" a few seconds later.
DRAFT - REPORT IN PROGRESS - will be finalized at the end of the shift
ITF found in LOW_NOISE_3 and in Science Mode. At 7:01 UTC I set the ITF in Maintenance Mode and manually unlock to perform the planned activities. Here a list of the works communicated to the Control Room.
- Cleaning of Scientific Area (External firm managed by Ciardelli)
- Vacumm Refill (VAC Team)
- OMC Scan/Lock in NI Single Bounce configuration (see section below);
- At 7:49 UTC, TCS Chiller Refill (Zaza);
- From 7:50 UTC, Squeezing Cable checks (Zendri)
- From 10:40 UTC to 11:10 UTC, Squeezing OPA realignment (Sorrentino)
- From 8:30 to 9:15 UTC, TCS Thermal References and Power Checks (Operator)
At I started to relock, but the ITF kept unlocking at LOCKED_ARMS_BEAT_DRMI_3F after few seconds. As an attempt, I've forced the shutter open on B1p_QD2 and QD1. After this second action caused an unlock it was possible to proceed further with the lock. ITF back in Science Mode from 12:47 UTC.
ITF set in Commissioning Mode at 13:09 UTC to allow the planned SQZ activity. ITF left locked.
TCS Power Checks
| CH [W] | INNER DAS [W] | OUTER DAS [W] | ||
| W | on the pickoff | 0.280 | 0.025 | 0.263 |
| N | on the pickoff | 0.66 | 0.051 | 0.613 |
DET
From 7:16 to 7:21 UTC - OMC Lock in NI Single Bounce Configuration
From 7:24 to 7:45 UTC - OMC Scan
-enlarged the position safety check,
-restarted WEN at 18.20 Hz,
-added alarms conditions in CALIMONI for WWN and WEN NCal (same as for NEB NCals except for rotor temperature which is not yet available)
-entered these alarms conditions in a new "NCALW" DMS box.
Server were restarted and work fine
Today, I found ITF in SCIENCE. At 03:31 UTC, ITF unlocked due to an earthquake (Mwp 6.7 - Off the west coast of South Island, New Zealand). From 03:35 to 04:19, the ITF status was in EARTHQUAKE. At 04:33 UTC, ITF returned to SCIENCE with autorelock. ITF left in SCIENCE.
Guard Tours (UTC):
- 22:00-22:35
- 00:40-01:15
- 03:55-04:30
ITF found in LOW_NOISE_3 in SCIENCE mode (AUTOSCIENCE_ON).
ITF unlocked at 14:24 UTC due to end TM (MIR or MAR) correction saturation. Autorelocked in LN3 at 15:09 UTC at first attempt.
CALIBRATION mode set at 15:10 UTC:
- 15:10 UTC - run inject_SSFS.py
- 15:32 UTC - CALIBRATED_DF_SENSITIVITY
- 16:29 UTC - CALIBRATED_DF_PCAL
- 17:24 UTC - ENV noise injections (COMMISSIONING mode needed)
At 17:41 UTC ITF back in SCIENCE mode (AUTOSCIENCE activated).
Guard tour (UTC):
19:00 - 19:43
ISYS
BPC: BsX_TX out of threshold (fig1). Expert informed
ITF found in relocking; it went in Science mode without any manual intervention at 6:47 UTC.
The attached plots show the noise on the SDB2 longitudinal photodiodes demodulated at 6MHz
- the first plot and its zoom show the FFTTime of the B1_PD3 photodiode and the ITF_LOCK state for the 20250322
- the third plot and its zoom one show the FFT of the B1_PD photodiodes demodulated at 6MHz according the ITF_LOCK state
- the B1_PD3 photodiode is located after the OMC, meaning that for the ITF_STATE lower than 109, there is no light reaching the B1 photodiode as the OMC shutter is closed
Remarks
- As the bump is present on the B1_PD3_6MHz even if the OMC shutter is closed, this bump is probably due to electronic noise
- for the frequencies greater than 4KHz, one may expect to have the shape of a lowpass 8th order Butterworth filter but it s not the case for all the ITF_LOCK state , meaning that there is aliasing
ITF found in Science mode. 06:54 UTC ITF unlocked. ITF left in relocking.
Guard Tours (UTC):
- 22:15-22:45
- 00:40-01:10
- 03:55-04:25
ITF found in LOW_NOISE_3 in SCIENCE mode (AUTOSCIENCE_ON).
ITF unlocked at 17:25 UTC due to end TM (MIR or MAR) correction saturation. Autorelocked at 18:17 UTC.
Guard tour (UTC):
15:07 - 15:50
17:04 - 17:47
18:50 - 19:19
ITF found in Science, BNS Range ~54Mpc
- 08:54UTC, ITF unlocked due to a bump in NE_MAR_Z_CORR signal (1st plot);
- 09:42UTC, ITF back to Science
Guard Tours (UTC):
(05:40) - 06:25
08:10 - 08:55
10:40 - 11:29
13:01 - 13:52
-guard tours(UTC):
22:05 --> 22:30
0:20 --> 0:50
3:40 --> 4:10
5:40 -->
Today, I found the ITF in SCIENCE. At 16:06 UTC, ITF unlocked. It returned to SCIENCE with the Autorelock at 16:56 UTC.
At 18:30 UTC, the scheduled CALIBRATION began:
- 18:30-18:4 UTC: CALIBRATED_DF_DAILY
- 18:42 UTC: ISC injections (inject_SSFS.py) failed.
- 18:54 UTC: ISC injections (inject_SSFS.py) failed.
At 19:20 UTC, CALIBRATION ended, and the ITF returned to SCIENCE.
Guard Tours (UTC):
- 16:57-17:33
- 18:54-19:23
ITF found relocking at CARM_NULL_1F (AUTOSCIENCE_ON). ITF relocked at LN3. SCIENCE mode at 06:22 UTC.
07:04 UTC - Unlock due to end TM (MIR or MAR) correction saturation. Back in SCIENCE mode at 07:52 UTC.
Guard tour (UTC):
07:04 - 07:38
12:40 - 13:10
SBE
06:05 UTC - SPRB vertical position recovered via stepping motors.
-guard tours|(UTC):
23:20 --> 23:55
2:15 --> 2:55
5:30 --> 5:55
ITF found in Science mode; it kept Science mode for the whole shift.
Guard Tours (UTC):
- 19:00-19:40
- 21:16-21:50
Following Michal's comment, I've added these channels to the list of unsafe channels (Detchar safety channel list from O4b) with an added comment pointing to this logbook entry.
To mitigate the demodulation noises on B1p_PD1_56MHz , the best signals are
- for the phase noise : the B1s_PD1_112MHz_phi as we can use any phase signals coming for the demodulated channels inside SDB2 tank
- for the amplitude noise : the B1p_PD1_6MHz_mag as we have use a signal related to the same photodiode. Unfortunately there is a bump in the 2KHz-3KHz region only on the 6MHz
Looking at all the SDB2 's demodulated signals at 6MHz (B1p_PD1, B1p_PD2, B1_PD2 and B1_PD3), we found that the bumps are present on the B1p_PD1, B1p_PD2, B1_PD3 ones but not in the B1_PD2 one (see plot)
These plots shows the FFTime over 2 days for the B1p_PD1, B1_PD2 and B1_PD3 6MHz channels
- from the 20250315-01h00m-UTC to 20250316-01h00m-UTC
- from the 20250416-01h00m-UTC to 20250317-01h00m-UTC
- and the trend related to this period for the ITF state and the INJ_LNFS_6MHz_raw_dFreq channels
This plot compare the B1 and B1p PD demodulated at 6MHz when the ITF is in LOW_NOISE_3 the 20240101-01h00m-UTC(red curve) and 20250321-12h00m-UTC(black curve): the bumps were already there and are moving with the time
The last plot and its zoom show the all the sample channels related to the longitudinal photodiodes located on the SDB2 bench
- the 4 top graphs are related to the PD channels acquired by the SDB2_DBOX_LETFDOWN DAQ box
- the 4 middlle graphs are related to the PD channels acquired by the SDB2_DBOX_LETFUP DAQ box
- the 4 botton graphs are related to the PD channels acquiered by the SDB2_DBOX_RIGHTUP DAQ box
- All the channels were the moving bumps is presents , B1p_PD1, B1p_PD2 and B1_PD3 show noisy structures around the 6MHz
- As a check, it might be useful to complete the B1pP_PD1 demodulation at 6MHz to check if the bump is also present
It remains to find the source of this noise
ITF found in Science mode with Autoscience enabled; it kept Science mode for all the shift.
