40m QIL Cryo_Lab CTN SUS_Lab CAML OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log, Page 128 of 355  Not logged in ELOG logo
ID Date Authorup Type Category Subject Text Attachments
  17723   Thu Jul 27 10:43:58 2023 KojiUpdateALSOLTFS of digital controllerWow, this is awesome. Can you plot the
comparison between the measured and expected
OLTFs for both (or either) Moku cases?
  17727   Thu Jul 27 17:03:57 2023 KojiSummaryCDSc1psl spare channel situationI looked at the Acromag situation
of c1psl to prepare for the PSL air flow
speed sensor.
  17728   Thu Jul 27 18:21:33 2023 KojiUpdateALSOLTFS of digital controllerHere is the OLTF from the model of the
system I made in Python. https://github.com/CaltechExperimentalGravity/LaserStabilization/blob/main/code/PlantSim/plant_model.py

  17730   Fri Jul 28 00:27:17 2023 KojiUpdatePEMITMX issue continuesEven though the noise issue of an OSEM
was resolved, the issue with ITMX still continues.
OPLEV pitch servo can't be turned
  17734   Sat Jul 29 00:44:57 2023 KojiUpdatePEMRemarks on the IFO recovery after CDS restart.I had a suspicion that some of the ITMX
coils were not properly working. So individual
coils of the 4 test masses were excited while
  17738   Mon Jul 31 22:25:07 2023 KojiUpdatePEMFIXED: Strange behavior of ITMX and ITMY probably due to DAC issue[Hiroki, Yehonathan, Yuta, Koji]


  17746   Wed Aug 2 14:50:22 2023 KojiUpdatePSLFIXED: Remote switching of PSL shutter is not working[JC Koji]
c1vac was hard rebooted. This fixed
the PSL shutter issue.
  17748   Wed Aug 2 17:17:37 2023 KojiUpdatePSLIMC Locking (FIXED: Remote switching of PSL shutter is not working)After the exploration of c1psl, the IMC
locking was not functioning well. It looked
like the MC autolocker issue.
  17751   Thu Aug 3 17:27:07 2023 KojiUpdateCDSSlow machine target folder clean upI went to /cvs/cds/caltech/target and found
some folders for apparently old targets.
  17753   Thu Aug 3 21:35:50 2023 KojiConfigurationPEMPSL Flow speed sensor channels addedAs the preparation of the flow
sensor installation, I added two slow channels
via c1psl (Acromag IOC).
  17754   Fri Aug 4 20:50:13 2023 KojiSummaryCDSThe location where the wiper script is runningThe raw frame file is stored in /frames
at fb. Before the disk space is flooded,
the wiper script deletes the old raw frame
  17756   Sat Aug 5 01:42:19 2023 KojiUpdatePEMc1sus DAC1/DAC2 negative side DAC outputs were isolated from the downstream chainAs reported already, we resolved the c1sus
DAC0 issue by introducing the differential
receivers for the DAC output CHs.
  17757   Sat Aug 5 01:46:01 2023 KojiUpdateOptical LeversBS/PRM/SRM Oplev dead[Koij Hiroki]

While KA was working on the DAC
issue, BS/PRM/SRM Oplev died.
  17778   Fri Aug 11 20:44:00 2023 KojiUpdatePSLCDS crash / PMC recovery and mystery / IFO recovery[JC, Koji]

In the morning, JC came in and
found that c1sus had crashed. JC tried to
  17781   Mon Aug 14 15:16:40 2023 KojiUpdateIOOPMC offset voltage issue fixed. IMC WFS recentered and offsets zeroed. 1.
Well, it seems that the PMC error offset
issue still remains.
  17782   Tue Aug 15 00:41:17 2023 KojiUpdateIOOPMC issue cont'dI went down to the IFO hall and checked
the PMC situation. The freq mixer fixed on
the rack 1X1 had BNC-T, so the raw error
  17783   Tue Aug 15 00:44:29 2023 KojiUpdateGeneralELOG slowness fixedElog was continuously accessed by net crawlers
or something similar. They continuously retrieve
random logs and also randomly hits the entries
  17786   Tue Aug 15 17:11:17 2023 KojiUpdateIOOFIXED: PMC issueSummary

The problem in the PMC
Frequency Reference Card (35.5MHz) was fixed.
  17790   Wed Aug 16 17:16:13 2023 KojiUpdateGeneralBHD / Misc Inventory==
BHD Components ==

  17802   Tue Aug 22 15:56:53 2023 KojiUpdateGeneralBHD / Misc InventoryPhotodiode inventory: [OMC
ELOG 615]
  17806   Wed Aug 23 19:47:53 2023 KojiUpdateCDSDolphin Fencing Investigation / Full CDS crash / nodus reboot / recovered allDolphin

- I made a basic description on
  17807   Thu Aug 24 02:54:19 2023 KojiUpdateBHDOMC Interface Aligner / BHD OFI arrangementOMC Interface Aligner - (It's upside

BHD OFI arrangement
  17810   Thu Aug 24 17:08:38 2023 KojiUpdateGeneralExcess noise on YALS BEATPaco took the data which means he already
had the beat note.

There is some chance that the beat
  17811   Fri Aug 25 20:27:33 2023 KojiUpdateBHDOMC Interface AlignerA bit improved the design of OMC Interface

The idea is...The OMC I/F aligner
  17812   Fri Aug 25 22:52:30 2023 KojiUpdateGeneralTaking nodus /home/export backupTook the backup (snapshot) of nodus'
/home/export as of Aug 25, 2023

  17813   Tue Aug 29 01:39:47 2023 KojiUpdateGeneralBHD / Misc Inventory40m BHD OFI Inventory


  17814   Tue Aug 29 02:02:51 2023 KojiUpdateBHDBHD Prep StatusReady / Soon Ready
- BHD OMC Cables ready
- OMC#1 / OMC#4 ready
  17827   Tue Sep 5 18:46:08 2023 KojiSummaryGeneralDsub 9 (DB9) cable inventoryI went to Section Y7 to check the stock
DB9-MF cables. The custom dsub cables are
also there.
  17830   Thu Sep 7 14:09:37 2023 KojiSummaryElectronicsVertex Electronics TransitionThe vertex electronics transition work
will begin on Monday. We expect the ongoing
ASS-X work to be completed by then. But if
  17834   Fri Sep 8 17:11:53 2023 KojiUpdateCDSFSSSlow restorationI came to the lab to see the recovery work
from the power glitch this morning 8:15AM.
All CDS seems up. The suspensions are somewhat
  17837   Tue Sep 12 18:49:51 2023 KojiUpdateGeneralTransformed 3x 18bit AI chassis into 16bitFor the preparation of the electronics
upgrade, three 18bit DAC AI chassis were
transformed to 16bit version.
  17838   Tue Sep 12 18:55:55 2023 KojiSummaryElectronicsVertex Electronics TransitionWe are ready to do the transition
from Wed 1PM.

The items for the upgrade was collected
  17839   Tue Sep 12 23:10:06 2023 KojiSummaryElectronicsVertex Electronics TransitionNote on Sorensen:

- Eurocard crate requires
+-15V. We can place two 15V Sorensens on
  17840   Wed Sep 13 12:46:03 2023 KojiSummaryElectronicsVertex Electronics Transition ~ final prep
[OK] Reflected the sorensen
setup (minimal change from the conventional
config. (See the attachment)

  17842   Wed Sep 13 14:02:29 2023 KojiSummaryElectronicsVertex Electronics Transition ~ final prep- 4x 1064nm NPROs
are OFF. The lab hall is laser safe, although
  17843   Wed Sep 13 17:26:26 2023 KojiSummaryElectronicsVertex Electronics Transition ~ DAY 1[Radhika, Paco, Murtaza, Koji]

- Removed all the units
that will not be used in the new setup.
  17844   Thu Sep 14 11:46:28 2023 KojiSummaryElectronicsVertex Electronics Transition ~ DAY 2[Radhika, Paco, Murtaza, Koji]

Morning work:

Power Strip assembly
  17845   Fri Sep 15 12:51:29 2023 KojiSummaryElectronicsVertex Electronics Transition ~ DAY 3[Radhika, Paco, Murtaza, Koji]

We made great
  17846   Fri Sep 15 18:50:34 2023 KojiUpdateCDSDolphin Fencing Investigation / Full CDS crash / nodus reboot / recovered allDolphin
Fencing technique

I believe that the dolphin emits
  17847   Fri Sep 15 22:57:15 2023 KojiSummaryElectronicsc1sus ADC1 AA chassis fixc1sus ADC1 AA chassis fix.

Brought the chassis on
the workbench.
Opened the chassis
  17848   Mon Sep 18 10:26:12 2023 KojiSummaryElectronicsVertex Electronics Transition ~ DAY 4[JC, Paco, Radhika, Koji]

Morning/Afternoon work:

Long DB cable installation
  17852   Mon Sep 18 20:16:03 2023 KojiSummaryElectronicsVertex Electronics Transition ~ DAY 4- Here is the thought how does the factor
of 9 come from:

We are driving OSEM LEDs
  17853   Mon Sep 18 23:09:40 2023 KojiSummaryElectronicsVertex Electronics Transition ~ DAY 4MC1 is ready for the damping test

Trouble shooting plan

Is the LED on? => Check
  17856   Tue Sep 19 19:48:20 2023 KojiSummaryElectronicsVertex Electronics Trouble shooting[Paco, Murtaza, JC, Koji, Radhika]

MC1/MC2 was working fine.

  17857   Tue Sep 19 20:49:08 2023 KojiSummaryElectronicsVertex Electronics Trouble shooting[Murtaza, Koji]

ITMX / BS / PRM sat amps were removed
from the rack and checked on the workbench.
  17858   Tue Sep 19 23:40:33 2023 KojiSummaryElectronicsVertex Electronics Wed PlanPlan
for Sept 20, 2023

For morning people:
  17859   Wed Sep 20 00:03:22 2023 KojiSummaryElectronicsre: Filter Coefficient Loading IssueI asked CDS mattermost for help. Chris
(Wipf) checked it and reported it is working
fine as usual (without fixing anything).
  17860   Wed Sep 20 00:20:09 2023 KojiSummaryElectronicsVertex Electronics ~ change in the actuator calibrationI found the actuator calibration is more
complicated. The numbers I reported in the
previous elog was not correct.
  17864   Wed Sep 20 18:18:38 2023 KojiSummaryElectronicsVertex Electronics Wed Plan[Koji, Murtaza, JC]

Regarding PRM/BS:

PRM2 cable and BS2 cable
  17865   Thu Sep 21 12:02:25 2023 KojiUpdateGeneralPower Outage Sept 21, 2023 ~9AM[JC, Paco, Koji]

We had a power outage on Sept 21,
2023 at ~9AM. This is the third power outage
ELOG V3.1.3-