Fil, Camilla WP11987
Fil labeled and then we removed the AS Air and OMC Trans Cameras form HAM6 +X Door. They are being stored on the metal racks in the SQZ bay. Plastic guillotines were inserted before removal and yellow VP covers install.
I have investigated the gradual increase of the BNS range from ~140 Mpc just after relocking, to ~160 Mpc a few hours after the relock by comparing the coherence between the CAL_DELTAL_EXTERNAL_DQ channel and the SUS, ASC and LSC channels to look for repeating patterns.
I have found that the LSC_SRCL_OUT_DQ channel shows a systematic decrease in coherence in the 20-50 Hz band from just after the relock to when the range has stabilized at ~160 Mpc. This is mirrored by an increase of the BNS-range count in the OAF_RANGE_BAND_3 in the hours just after relocking.
The attached plots show the coherence difference between a time at which the BNS range was at 140 Mpc, in red, and the time at which the BNS range has stabilized at 160 Mpc, in blue, for the four relocks on the 7th of July 2024. I also attached time series plots of the BLRMs for the same time period.
FAMIS 25999
This CPS Spectra was ran after the vent on 2024-07-18.
Thu Jul 18 08:04:50 2024 INFO: Fill completed in 4min 47secs
Jordan confirmed a good fill curbside.
TITLE: 07/18 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Corrective Maintenance
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
SEI_ENV state: MAINTENANCE
Wind: 6mph Gusts, 4mph 5min avg
Primary useism: 0.01 μm/s
Secondary useism: 0.09 μm/s
QUICK SUMMARY:
IFO is in MAINTENANCE for VENTING
Getting ready for an 8:30 meeting detailing plans for the vent this week and beyond.
Other:
*H1:PEM-CS_DUST_PSL102 WARNING: dust counts did not change, please investigate
Jason, Ibrahim, Dave:
We verified that the PSL102 dust monitor is not communicating with the EPICS IOC and most probably needs a power cycle of the dust monitor to restore it. Jason is scheduling an incursion into the PSL enclosure for this, and in the mean time we will continue to run without this dust monitor The last good reading from PSL102 was 9th July 2024.
Late entry from yesterday (7-16): The Kobelco (corner station purge air supply) was switched on at 4 pm. It needs to run at least 12 hrs before vent Today's activities: - The purge air dew point was measured: Right tower (11 am) -42.1 deg C; left tower (11 am) -43.4 deg C; the dew point at the purge port before venting (4:10 pm) -42.2 deg C - Particle counts of the purge air before venting (4 pm; 3 l/min flow rate): 0 pcs. of 5 um or larger particles - The following GVs were closed: GV1, GV2, RV-1, RV-2, FCV-1, FCV-2, FCV-3, FCV-4, and GV5 soft closed (see explanation below) - All the adjacent Ion pumps (IP1, IP2, IP3, IP4, IP14) were valved out - The OMC RGA was valved out, and now is being pumped by an aux cart - The Y-manifold Turbo was switched on and valved in, in order to hold the pressure between GV1 and GV5 - The vent started at 16:15, and lasted until 19:30. This means an overall ~3.9 Torr/min pressure rise, which is a nice slow vent. We hit some ~8 Torr overpressure, and then blew the volume down The reason behind the soft close of GV5: because CP1 is most likely saturated, or at least only has some reduced pumping performance, after closing GV1 and GV2, the pressure of the Y-arm started to rise (notice, that after the close of these 2 GVs, the X-arm CPs were not able to aid the Y-arm CPs). Therefore, the pressure in the Y-manifold started to drop, and the pressure at CP1 (PT-114, PT124) started to raise: this phenomenon would have gone until equilibrium. To avoid the pressure rise of the Y-arm, we soft-closed GV5, and valved in the Y-manifold turbo. This helped, as the pressures are stabilizing now at all areas. This also shows now undeniably, that the pumping performance of CP1 is seriously reduced, and definitely needs regeneration. And, this also explains the relatively high pressures at LHO's corner (notice, that before the vent it was in the low E-8s, while at LLO it is in the mid-low E-9s). Tomorrow, some graphs will be added as a comment in this topic. The pressures: - Corner: atmosphere - Y-manifold: 2.9E-8 Torr - CP1: 4E-9 Torr - CP2: 5.4E-9
TITLE: 07/17 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Corrective Maintenance
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
SEI_ENV state: MAINTENANCE
Wind: 17mph Gusts, 13mph 5min avg
Primary useism: 0.04 μm/s
Secondary useism: 0.08 μm/s
QUICK SUMMARY:
IFO is DOWN and in CORRECTIVE MAINTENANCE - VENTING
With maximum sarcasm, I report that it's been a slow day. Here's a rough rundown:
The vent plan can be found at E2400260
Other:
EY Intelli-site network down (Fil contacting contractors)
Start Time | System | Name | Location | Lazer_Haz | Task | Time End |
---|---|---|---|---|---|---|
14:58 | FAC | Kim, Nelly | LVEA | N | Technical Cleaning in prep for vent | 19:14 |
14:58 | FAC | Karen | Optics Lab, Vac Prep Lab | N | Technical Cleaning | 15:13 |
15:20 | FAC | Chris | LVEA | N | Tech cleaning tops of HAM 5,6,7 | 16:57 |
15:39 | FAC | Tyler, Erik | FCES, LVEA | N | Forklift from FCES to HAM5, 6 | 16:39 |
15:39 | FAC | Richard | LVEA | N | Checking on Vent Prep Work | 15:42 |
15:48 | EE | Fil | EY | N | Network Access Work | 16:48 |
17:35 | sus | corey | cr | - | ZM6.OM2 TFs | 21:24 |
18:33 | VAC | Travis, Jordan | LVEA | N | Gate Valves | 19:33 |
18:34 | VAC | Janos | LVEA | N | Gate Valves | 19:34 |
18:34 | OPS | TJ | LVEA | N | Parts check | 19:14 |
20:53 | EE | Fil | LVEA | N | Turning High Voltage Off | 21:26 |
20:54 | VAC | Travis, Jordan | LVEA | N | Viewport Checks | 20:54 |
21:02 | VAC | Janos, Travis, Jordan | LVEA | N | Closing Gate Valve 5 | 22:02 |
21:18 | EE | Fil | MY | N | Drop off part | 22:18 |
21:35 | FAC | Chris | Lvea | N | HAM7 | 21:35 |
22:55 | AOS | TJ | Optics Lab | N | Gathering AUX Optics | 23:55 |
As part of the TF A-Team, SR2 and SR3 TFs can be found here under today's date - 07-17-2024
SR2:
/ligo/svncommon/SusSVN/sus/trunk/HSTS/H1/SR2/SAGM1/Data
SRM:
/ligo/svncommon/SusSVN/sus/trunk/HSTS/H1/SRM/SAGM1/Data
PDFs to be posted, edited, commented in soon.
Find attached both the TF Model Comparisons and the ALL_TF Model and Previous Measurements Comparisons
allhsts comparisons: /ligo/svncommon/SusSVN/sus/trunk/HSTS/Common/Data
SRM All_TFs: /ligo/svncommon/SusSVN/sus/trunk/HSTS/H1/SRM/SAGM1/Results
SR2 ALL_TFs: /ligo/svncommon/SusSVN/sus/trunk/HSTS/H1/SR2/SAGM1/Results
J. Kissel Executive Summary: In prep for the upcoming vent, I've measured the undamped dynamical transfer functions of the H1SUSOFI. The dynamics look healthy. The rest of the story: The OFI's digital control system has had a sordid history (mostly the OSEM2EUL and EUL2OSEM matrices, but also the damping loops), and assessment of it's health has been person power limited over the years. I've fixed all that today, and restored the suspension's control system to good health -- such that the transfer functions match the model as they did (once) in 2023. More details explaining the plots later, but we're good to go for the vent. Today's data lives here /ligo/svncommon/SusSVN/sus/trunk/OFIS/H1/OFI/SAGM1/Data 2024-07-17_1741_H1SUSOFI_M1_WhiteNoise_L_0p02to50Hz.xml % undamped 2024-07-17_1741_H1SUSOFI_M1_WhiteNoise_T_0p02to50Hz.xml 2024-07-17_1741_H1SUSOFI_M1_WhiteNoise_Y_0p02to50Hz.xml 2024-07-17_1950_H1SUSOFI_M1_WhiteNoise_L_0p02to50Hz.xml % damped 2024-07-17_1950_H1SUSOFI_M1_WhiteNoise_T_0p02to50Hz.xml 2024-07-17_1950_H1SUSOFI_M1_WhiteNoise_Y_0p02to50Hz.xml
The OSEM2EUL and EUL2OSEM matrices were generated in a Matlab workspace with /ligo/svncommon/SusSVN/sus/trunk/OFIS/Common/MatlabTools make_susofis_projections.m [rev 10980] which, notably is an improved version of the script with the Yaw lever arm bug fixed (see LHO:61353). and populated into EPICs with /ligo/svncommon/SusSVN/sus/trunk/Common/MatlabTools/ fill_matrix_values.m [rev 11862] The first attached screenshot shows the "new" restored matrix values, and that they were accepted into SDF. (Recall, the OFI lives on the front-end model "h1susifoout", and this model's safe and OBSERVE .snap files both point to the same file, so there's no need to accept the SDF DIFFs in both SAFE and OBSERVE, $ pwd /opt/rtcds/lho/h1/target/h1susifoout/h1susifooutepics/burt $ ls -l lrwxrwxrwx 1 controls 69 Oct 10 2022 OBSERVE.snap -> /opt/rtcds/userapps/release/sus/h1/burtfiles/h1susifoout_observe.snap lrwxrwxrwx 1 controls 69 Oct 10 2022 safe.snap -> /opt/rtcds/userapps/release/sus/h1/burtfiles/h1susifoout_observe.snap ) For the record, the previous matrix values -- where matrix elements are single DOF to DOF unity maps with gains of 1.0 were accepted into SDF on Tuesday April 25 2023, two months before the start of O4 (LHO:68984). These elements were leftovers from some guest-star testing that was done just prior -- see e.g. LHO:68910, which was motivated by evidence of back scatter in the OFI, see e.g. LHO:68846.
The data in the main aLOG above (LHO:79198) was exported and individually processed with /ligo/svncommon/SusSVN/sus/trunk/OFIS/Common/MatlabTools/ plotOFIS_dtttfs_M1.m [rev 11875] I also exported and individually processed the large back-log of data taken for the OFI since 2019, '2021-10-11_2300' | LHO:60211| Oct-Nov 2021 Vent pre-install of OFI shroud '2021-11-09_2217' | LHO:60603| Post-OFI shroud install, mechanical interference alleviated '2021-11-10_1750' | LHO:60610| Doors on, in-air close out measurements '2021-12-14_1400' | LHO:61055| Health-check post vent after pumpdown '2023-04-18_1800' | LHO:68846| Health-check in-vac, due to suspicions of backscatter caused by the OFI '2024-04-24_1500' | LHO:77391| Health-check after first major alignment excursion in O4b due to KTP crystal damage (LHO:77392); has bad basis change matrices leftover from LHO:68910 poorly restored via trending '2024-07-17_1741' | LHO:79198 | Pre-vent TFs after updating / restoring bases matrices These data are committed to /ligo/svncommon/SusSVN/sus/trunk/OFIS/H1/OFI/SAGM1/Results/. I then added the above historical log information to the TF comparison script for the OFI (after updating to absorb similar updates from LLO) /ligo/svncommon/SusSVN/sus/trunk/OFIS/Common/MatlabTools/ plotallofis_tfs_M1.m [rev 11902] such that I could make the comparison of all of this data posted as the second attachment to the main entry. The YAW DOF in those plots (page 3) exposes the history the best: 2019-10-11 17:50 -- This is the former "high loss" OFI from aLIGO, prior to the complete rebuild and upgrade that was needed for frequency-dependent-squeezing. 2021-10-11 23:00 --\ 2021-12-14 14:00 -- -- These two 2021 data sets show the OFI *after* upgrading to the FDS capable ultra low loss faraday. Apparently the yaw moment of inertia is a bit less, or the yaw cabling stiffness is a bit higher, so the resonant frequency shifts up a bit. However, this data still has the lever arm bug, so you see the magnitude is a factor of 2 larger than the model. 2023-04-18 18:00 -- This is just after I fixed the lever arm bug, and thus now the magnitude lines up with the model. It's also just prior to when the EUL2OSEM and OSEM2EUL matrices where left in the testing configuration just before and throughout O4 up until Jul 17th. 2024-04-24 15:00 -- Due to suspicions of back-scatter, with too little person power, we restored the basis change matrices to *something* but definitely not the correct basis matrices. We green-lighted the dynamics with a hand waive of "well, it doesn't look like it's *rubbing,* and we guess that it's looked like this and didn't have damping loops on for all of O4 so... probably fine?" 2024-07-17 17:41 -- This aLOG series, with the basis change matrices restored -- and the dynamics restore to the 2023-04-18 goodness.
SUMMARY: Transfer Functions COMPLETED for ZM6, OM1, & OM2. Leaving in DAMPED guardian state for vent. Will post matlab plots in a comment to this alog later.
Joined team of others (Ibrahim, Jeff, Rahul, RyanC) in getting SUSpension transfer functions in preparation for upcoming vent. We split up the work amongst us. I took on ZM6, OM1 and OM2.
7/18/24 Update NOTE: OM3 measured by Ryan C, OMC measured by Rahul. Their results are posted in a comments below!
Instructions for this work is at: https://awiki.ligo-wa.caltech.edu/wiki/Suspensions/OpsManual/TFs/DTT
For TODAY, this is what I did:
Here are the locations of the files noted above:
Will leave all of these SUSpensions in their DAMPING guardian state (vs ALIGNED).
I ran the first analysis code for the OMs.
Attached are the Matlab-generated plots for ZM6 (with measurements I ran yesterday).
(Ryan already made the plots for OM1 & OM2 which I measured yesterday--Thanks!)
I should note this was my first time running through this procedure for taking SUS transfer functions. I had a few issues which came up (mainly svn-related), but got through some of this yesterday with Jeff's help, and Erik helped me this morning with other svn issues, but for these issues, I opted to not run an SVN update since there was a note for a "conflict". So I skipped the svn steps for plotting.
The Latest H1SUSZM6_M1_ALL_TFs.pdf is now availible
If you want to know where this lives on the CDS machines it can be found here:
/ligo/svncommon/SusSVN/sus/trunk/HXDS/H1/ZM6/SAGM1/Results
I have taken the in-vacuum measurements for OMC (HAM6) and they look great - see screenshots attached below.
Sheila, Jennie, Camilla
Now Jim has locked HAM5/6 HEPI and isolated ISI's (to be similar to when vented and locked), we recreated the IFO single bounce and SQZ alignments onto AS_C for the recent bad OFI spot and the April OFI bad spot. Used template/ligo/home/camilla.compton/Desktop/SRC_OMC_align.yaml
This should simplify setting alignment references once vented.
July bad OFI spot (alignment used May-July):
April bad OFI spot (alignment used pre-April):
Travis requested that the cell phone alarms for BSC2 vacuum gauge be turned off for the duration of the vent. I have removed the PT120 pressure and error channels from the alarms system and restarted the systemd alarms.service on cdslogin.
Channels removed are:
H0:VAC-LY_Y1_PT120B_PRESS_TORR
H0:VAC-LY_Y1_PT120B_PRESS_TORR_ERROR
Ditto for HAM6
H0:VAC-LX_Y0_PT110_MOD1_PRESS_TORR
H0:VAC-LX_Y0_PT110_MOD1_PRESS_TORR_ERROR
The following high voltage power supplies/electronics were powered off in preparation for the corner vent.
1. CER Mezzanine - ESD HV
2. CER Mezzanine - Fast Shutter HV
3. CER Mezzanine - OMC PZT HV
4. CER - SR3 and ITM heaters
5. LVEA - Fast Shutter Driver Chassis - Disabled and powered off
6. MER Mezzanine - HAM7 PSAMS HV
7. MER Mezzanine - HAM7 Piezo HV
Camilla verified picomotors, OPO TEC, OFI, and SF1/SF2 were disabled. ZM4/ZM5 ramped down to 0V before powering down high voltage.
F. Clara, C. Compton
The seismic state of HAM5 during this measurement was, ISI_DAMPED_HEPI_OFFLINE and the HEPI was locked yesterday. I put SR3 to DAMPED, made sure the damping outputs were off and the TEST outputs were on. Overall it looks fairly close to the model.
On Roll I saw an extra peak around ~1.04 Hz, and Verticle around ~1.5 Hz (cross coupling from yaw?).
The templates are saved at /ligo/svncommon/SusSVN/sus/trunk/HLTS/H1/SR3/SAGM1/Data