40m QIL Cryo_Lab CTN SUS_Lab CAML OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
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ID Date Author Type Category Subject Text Attachments
  17945   Wed Nov 1 12:28:28 2023 yutaUpdateASCBeam spot position measurements before the ventBeam spot position measurements were done,
oplevs aligned.
Attachment #1 shows
  17944   Wed Nov 1 10:58:55 2023 PacoUpdateGeneralBHD OMC VentUpdate Wed Nov 1 10:58:48 2023

All vertex suspensions are now
under software watchdog logic. I tested all
  17943   Tue Oct 31 21:09:15 2023 KojiUpdateBHDOMC bond reworkWe came back to the OMC 24 hours later
and found the
bonding work yesterday went well.
  17942   Tue Oct 31 17:42:45 2023 PacoUpdateGeneralBHD OMC Vent[Koji, Paco]

  17941   Tue Oct 31 17:27:27 2023 PacoUpdateSUSETMX software watchdog[Koji, Paco, Yuta]
We implemented the ETMX software watchdog
"level 1", meaning the logic disables
  17940   Tue Oct 31 17:27:09 2023 KojiUpdateSUSETMX POS unstable when misaligned[Koji Paco]

We decided to invert the signs
of the misalignment offset for ETMX to see
  17939   Tue Oct 31 16:25:29 2023 KojiUpdateSUSETMX POS unstable when misalignedI noticed that there was an oscillating
spot on the ITMX face camera image. I tracked
the source down and found it was the motion
  17938   Mon Oct 30 19:20:16 2023 KojiSummaryGeneralBHD InventoryPrepared the following components around
the staging clean booth:

SOS 2"->3"
  17937   Mon Oct 30 19:11:58 2023 KojiUpdateASCMoIs for the BHD SOSsFrom the ITMX window, I confirmed that
PR2 is using the original metal sleeve and
the optic is 3/8" thick. (See Attachment
  17936   Mon Oct 30 18:04:46 2023 PacoUpdateSUSBS Oplev checkI measured the Oplev PIT/YAW OLTFs and
adjusted the gains to get 0.1 to ~ 4 Hz feedback
as is recommended
  17935   Mon Oct 30 15:47:16 2023 KojiUpdateBHDOMC bond rework[JC Koji]

We successfully applied EP30-2
on the OMC #1.
  17934   Mon Oct 30 14:29:20 2023 yutaUpdateASCBeam spot position measurements with updated moment of inertiaBeam
spot position measurements were done again
using updated estimate of moment of inertia.
  17933   Mon Oct 30 13:28:28 2023 KojiUpdateBHDEpoxy removal[JC Koji]

In the preparation of the OMC bond
rework, we removed the remaining bond layer
  17932   Sun Oct 29 21:09:23 2023 KojiUpdateBHDOMC cable bracket delamination[JC, Koji]

While adjusting the kinematic mount,
we noticed that the OMC cable bracket was
  17931   Sun Oct 29 21:01:18 2023 KojiUpdateBHDIntegration of the BHD platform and an OMC[JC, Koji]

of the BHD platform and an OMC
  17930   Sat Oct 28 18:07:37 2023 KojiUpdateASCMoIs for the BHD SOSsI checked Solidworks models to see the
mass/moment of inertia for the BHD SOS masses.
The mass/MoI calculation includes
  17929   Sat Oct 28 18:04:43 2023 KojiUpdateGeneralEP30-2 kit brought from DownsEP30-2 kit brought from Downs on Oct 27,
2023. Stephen said he would take care of
the property (location) record.
  17928   Sat Oct 28 02:33:22 2023 yutaUpdateASCBeam spot position measurements with updated demodulation methodBeam
spot position measurements were done again
using updated demodulation method.
  17927   Fri Oct 27 17:37:26 2023 yutaUpdateASCBeam spot position measurements with signBeam
spot position measurements were done again
with the correct sign on the mis-centering.
  17926   Fri Oct 27 13:30:16 2023 ranaUpdateASCBeam spot position measurementsI looked at this code and it is a little
untrustworthy. The demod is not being done
correctly so there can easily be some aliasing
  17925   Thu Oct 26 21:37:08 2023 yutaUpdateASCBeam spot position measurements[Begüm, Paco, Yuta]

Beamspot position
  17924   Thu Oct 26 19:40:57 2023 RadhikaUpdateASSXARM ASS WorkingXARM ASS Fixed (hopefully)

winning approach was considering T and L
  17923   Thu Oct 26 18:34:58 2023 KojiSummaryGeneralOMC #1 / DCPDs / Glass Breadboard are in[Begüm, Koji]

We brought the OMC #1 / DCPDs /
a glass breadboard from the OMC lab to the
  17922   Thu Oct 26 13:54:08 2023 KojiSummaryGeneralTowards vent on Nov 1st.=
BHD Platform assembly on the staging table
  17921   Thu Oct 26 13:50:14 2023 KojiUpdateGeneralPicomotor / HWP rotator wiringWiring configuration for the picomotors
and the HWP rotator.
The mighty mouse connectors on the
  17920   Wed Oct 25 14:03:17 2023 RadhikaUpdateLSCFPMI CARM with CM boardI drew a block diagram to work through
the high-bandwidth CARM feedback using the
CM board. The goal was to obtain a derivation
  17919   Wed Oct 25 09:23:31 2023 JCUpdateLSCC1SUS2 Crash Again[JC]

I came in this morning and began
to fiddle with the Spectrogram. There was
  17918   Tue Oct 24 18:19:44 2023 yutaUpdateSUSActuator calibrations of BHD optics[Begüm, Vittoria, Yuta]

We calibrated actuators for
  17917   Tue Oct 24 18:07:06 2023 yutaUpdateCDSc1sus2 crashed againWhile locking ITMY single bounce vs LO
fringe, c1sus2 crashed again (at around 17:20
  17916   Mon Oct 23 22:35:53 2023 PacoUpdateLSCFPMI CARM with CM board[paco, yuta]

We achieved a ~23
  17915   Mon Oct 23 16:41:22 2023 KojiSummaryBHDBHD PlatformThanks, JC for putting the parts together!
I'll start collecting the instruments
necessary for the OMC mounting / locking.
  17914   Mon Oct 23 16:32:38 2023 yutaUpdateLSCPRMI 1f carrier locking recovered, but not so stable[Vittoria, Yuta]

  17913   Mon Oct 23 15:38:19 2023 KojiUpdateCDSDolphin Fencing Investigation / Full CDS crash / nodus reboot / recovered allThere should be a correct wrapper script
such that we don't need to do nonsense
like remembering the IP address and the port
  17912   Mon Oct 23 14:42:17 2023 JCSummaryBHDBHD PlatformToday, I spent majority of my time insterting
the Helicoils for the Platform Assembly,
D2100435. 181 Inserts to be exact.
  17911   Mon Oct 23 14:08:57 2023 JCUpdateCDSDolphin Fencing Investigation / Full CDS crash / nodus reboot / recovered allWe used this technique earlier and we came
across a mistake while we were following
the steps from the elog. (The Wiki is better,
  17910   Fri Oct 20 15:51:21 2023 JCSummaryBHDBHD PlatformThe BHD platform assembly is going well.
I have gotten majority of the Helicoils into
all of their components. The only Helicoils
  17909   Thu Oct 19 13:54:16 2023 PacoUpdateLSCFPMI locking and high BW CM board[Paco, yuta]

investigated the situation of the CM board
  17908   Thu Oct 19 07:14:44 2023 JCUpdateIOO Morning AlignmentBasic
Arm Alignment has been done

seemed to have railed overnight.

  17907   Wed Oct 18 21:21:58 2023 PacoUpdateLSCFPMI locking and high BW CM board[Paco, yuta]


- We recovered the FPMI lock after
  17906   Wed Oct 18 13:01:52 2023 JCSummaryDaily ProgressLab WiFi!!We
Now Have WiFi Through The Entire Lab!!

and I connected the new routers and expanded
  17905   Wed Oct 18 12:29:19 2023 PacoUpdateSUSOPLEV Whitening Board Fixed and installed (ETMX)[Murtaza, Paco, Radhika]

We got some LT1128s from downs
(Dean) to get this board up and running again.
  17904   Wed Oct 18 12:20:26 2023 JCUpdateFrequency noise measurementSpectrogram Using GWpy[JC]


I was able to make a spectrogram
  17903   Tue Oct 17 19:35:31 2023 RadhikaUpdateASSReducing XARM-ASS ErrorsI resumed work to
restore XARM ASS

I manually
  17902   Mon Oct 16 20:50:32 2023 PacoUpdateIOOsome IMC WFS tweaks: update - MC_TRANS +80dB FM5 back onSince the MC_TRANS_PIT and MC_TRANS_YAW
control signals were still small even though
the sum was ok, I found the C1:IOO-MC_TRANS_PIT/YAW
  17901   Mon Oct 16 19:37:12 2023 yutaUpdateLSCPRMI 1f carrier locking recovered, but not so stablePRMI
1f carrier locking using AS55_Q and REFL55_I
was recovered, but
  17900   Mon Oct 16 08:28:27 2023 JCUpdateVACN2 tripped and Vac lockedThe last N2 tank ran out this morning ~3:00am.
Since then the Vac system tripped and the
shutter closed. I had to head over to the
  17899   Fri Oct 13 08:42:14 2023 murtazaUpdateSUSOPLEV Whitening Board Missing (ETMX)[Yuta, Paco, Murtaza]


Chasing the excess noise in TRX,
  17898   Thu Oct 12 18:47:52 2023 yutaUpdateLSCALS DARM CARM locking successfulALS
DARM and CARM locked.
The procedure basically follows what
  17897   Wed Oct 11 22:57:11 2023 PacoUpdateALSOn the residual frequency dependence of the ALS DARM calibration with FPMI[Paco, Yuta]

Attachment #1 shows
tonights OOL ALS noises with the PSL hepa
  17896   Wed Oct 11 21:23:49 2023 yutaUpdateLSCFPMI locking restored after vertex coil driver upgrade[Murtaza, Vittoria, Paco, Yuta]

restored FPMI RF locking for the first time
ELOG V3.1.3-