Images from HAM3, West door:  H1 locked in NLN

1. IR light exiting the North viewport (sticky on LEXAN, IR camera, false color image) taken by Adrian Helmling-Cornell
   1. note the second beam, a strong IR beam at the edg of the viewport at about 4 oclock
2. IR light exiting the North viewport (steep angle, sticky on LEXAN, IR camera, color enhanced image) taken by Cheryl Vorvick
3. IR light on HAM3 SLED, and on HAM3 inner chamber wall, North viewport
4. IR light on beam dumps behind MC2, image as taken (dark)
5. same as image as #4, lightened
6. IR light on 90/10 splitter behind MC2. Center Viewport, showing light on the optic mount
7. same image as #6, lightened
8. IR light, MC2 side view, MC2 baffle, PR2 baffle aperture showing a beam on the right, and also through the aperture, the far vertical edge of the side plate is illuminated by IR light
   1. The MC2 cage has a beam on the 45deg lower left angle brace, and the upper right angle brace (more faint, but it is present).
   2. The MC3 baffle frame has a beam on both vertical sides facing MC2 , the beam on the near side to the viewport is larger and a stronger beam.  The beam on the far side from the viewport is smaller.
9. IR light, Center Viewport, from left to right, MC2 trans QPD and beam dumps, MC2, PR2 baffle aperture, MC2 baffle
10. same as #9, lightened
    1. The beams on the 90/10 splitter are consistant in multiple views, the amount of reflection changes, but the beams are consistantly on the mouunt.
    2. The beams on/around the beam dumps and QPD and their posts is consistant in multple views.

Resumed XBM pump down today by valving the QDP80 back in. At about 500 mTorr, spun up turbo and pressure fell to mid -4 Torr range within a few hours.

Needed custom adapter cable used at XBM for YBM turbo to start its pump down (for safety valve engagement) and in the process of swapping cables at XBM turbo station, the QDP80 tripped. Scroll was running and turbo was in local mode, anticipating a trip, but I forgot to close the QDP80 manual valve, so there was some backstream flow that caused the turbo to trip from overpressure. Thankfully the 10" isolation gate valve was closed the entire time, so the main volume pressure was not affected. Turbo volume pressure rose to about 10 Torr.

Upon start up after incident, the turbo pump tripped from strong vibration and won't come up to full speed. We tried several the tricks including feeding a gas load at inlet to load the bearing. This turbo has a history of failing from rotor resonance and in the past front loading with gas has helped. May the XBM Seiko rest in peace.

Pressure in XBM is currently reading 2e-4 Torr. We could leave it sit until we start pumping on adjacent vertex volume next week, by opening GV2 and combining volumes, or make an effort to:  a) install old turbo that was just removed from vertex or SS500b; or b) install new turbo station, untested (scheduled to replace this turbo in third week of vent). Will sleep on it and see how pressure rises overnight.

{Bubba, Tyler, Chris, Chub, Jordan, Chandra}

BSC8 flat door is installed (D1800205) and annulus is being pumped down. Blew down purged air in YBM volume and measured -31.4degC dew point. Needed to rework some of the custom signal cable to enable safety valve so we will start roughing out volume tomorrow.

Jason O, Georgia M

ECR 1900246

This week we have been in the PSL installing a new fiber pick-off for the ALS and squeezer lasers. The old pick off is on transmission of the reference cavity while the new one is on the ALS bypass, after the PMC. Peter K started this work a month ago (alog 51610).

We currently have installed a mode matching lens (f=200mm f=150mm) between the beam splitter and the steering mirror, and achieved ~73% ~82% power transmission through the fiber so far.

We think we can get more light through the fiber by tweaking the mode matching lens position. We will need to go back into the PSL again to finish this work and feed the fiber and photodiode cable out to the rack. 

Once the layout is finalised I'll update the psl table layout document (D1300348).

Modifications to the fiber distribution box are also ongoing.

Sheila, Fabrice, Daniel, Nutsinee

Today we went in to check our pump mode matching into the OPO with the new fiber. The mode mismatch (2nd order mode) was high so we decided to swap the collimator as well. After some alignment tweak we were able to get >90% mode matching. The new collimator part number is 355230-FCAPC-532--00-H9Q001, Bake load number is 9435.

We tried to improve the alignment into the coupler on ISCT6 but only got a few % improvement. The overall transmission from ISCT6 to SQZT6 is 40-45%

We scanned the second PZT (PZT1 on the red interface box) and saw similar behavior as the other PZT that we have been using (~2-3 FSR over 100V scan).

We tried to check the sqz beam (seed) on the OMC side but because both HAM5 and HAM6 ISI were tripped this check will have to wait. Both pump and seed came through SQZT6 just fine. Sheila and Fabrice tuck in the 5m fiber into the orange conduit. The new in-air fiber from ISCT6 to HAM6 is labeled O3-B.

We are back to where we were exactly a year ago.

SudarshanK, JeffK, LilliS

Two additional sets of high frequency sweeps (2019-09-10 and 2019-09-22) have been  processed and included in the HDF5 file that was previously generated and describe in alog #52132. 

The resultant HDF5 file and the script used to generate it can be found here:

^trunk/Runs/O3/H1/Scripts/Uncertainty/process_allmeas_includingPCALXHFdata_writeGPRHDF5_model20190909-C.py
^trunk/Runs/O3/H1/Results/Uncertainty/O3_H1_C_GPR_20190909_nofsQcorr_fmin20Hz_lengthscaleZp5_withPCALXHFdata.hdf5

The plots are attached with this alog.

Patrick, Jonathan, Dave:

PT180 (BSC8) was upgraded from a BPG402 to a BCG450. Patrick generated a new h0vaclx.ini file with the following changes:

MOD2 number of channels down by 2

MOD3,MOD4 added, each 7 channels

So net increase of +12 channels.

I created two new INI files, one for the standalone EDC (h1nds3) and one for the main DAQ.

I restarted h1nds3 at 12:30 PDT, the number of channels increased as expected and all channels connected correctly.

I restarted the main DAQat 12:38 PDT in the sequence: h1dc0 shutdown, followed a few seconds later by h1edc restart.

Monit had lost connection with the h1dc0 daqd process and did not restart it automatically. I manually instructed monit to restart using the web interface, and the DAQ came back after a downtime of several minutes.

[Dan Brown, Jenne]

We cleaned up several no-longer-used optical components that had been stored in the corner of ISCT1, in order to make some space for the placement of the phase camera.

Attached is a photo from mid-August of most of the stuff that we removed.  The 1" optics were all unmounted, boxed, and labled, and put into the optics lab.  The 2" optic was put in the ISC cabinet in the squeezer bay. The 4" beam alignment aperture was also put into the ISC cabinet in the squeezer bay. Razor beam dumps and the mounting hardware was all put into their drawers in the optics lab.  The 1611 1GHz PD went with the others of that type on a shelf in the optics lab.  The old REFL WFS are with Fil for inventory and storage.

TITLE: 10/03 Day Shift 15:00 – 23:00 (08:00-16:00), all times posted in UTC

STATE of H1: Planned Engineering

INCOMING OPERATOR: None

SHIFT SUMMARY: Updated PT-180 software, turbo replacement underway, XBT manifold pump down underway, PSL work ongoing, ISCT1 prep done

LOG:

Tyler, Chris, Kyle, to LVEA -- start spool work, misc. Work

15:10 (08:10) Chub, Jordan to LVEA -- assist VAC team

15:54 (08:54) Jason to Optics Lab

16:04 (09:04) Patrick finished with PT-180 software upgrade

16:15 (09:15) Jason out of Optics Lab

16:33 (09:33) Sheila to SQZT6 -- check alignment

16:33 (09:33) Dan to LVEA -- prep for ISCT1 work

16:37 (09:37) Gerardo to LVEA -- assist Kyle

16:47 (09:47) Chris, Tyler out of LVEA -- crane work done

17:10 (10:10) Tyler to LVEA

17:13 (10:13) Karen to woodshop

17:31 (10:31) Tyler out of LVEA

17:33 (10:33) Gerardo to MY -- grab tools

17:56 (10:56) Tyler to LVEA -- start craning old turbo

17:57 (10:57) Gerardo back from MY

18:02 (11:02) Jason, Georgia to PSL enclosure -- continue ALS bypass pick-off work

18:05 (11:05) Betsy to LVEA -- find Chandra

18:05 (11:05) Handing off to Cheryl

WP 8396

Done to change PT180 from a BPG402 Inficon gauge to a BCG450 Inficon gauge. Changes to C# and Powershell scripts submitted to svn yesterday. Restart done today.

Did not go as smoothly as expected. Upon regenerating the solution the names of most of the channels in the I/O list for each of the BPG402 gauges changed to what I thought was the 1.3.0.0 version. However, the version listed for the gauges is still 1.2.1.0. I do not understand why this happened. For now I have changed the Powershell script to use the 1.3.0.0 version names. I am not submitting this change to svn.

Burtrestored to 8:00 am this morning.

DAQ restart and medm changes still needed.

{Bubba, Chris, Tyler, Chub, Jordan, Chandra}

Another good day of H2 decoupling work. We removed the expansion spool from BSC7 and installed the new door with no issues. Annulus pumped down quickly indicating no inner and outer o-ring leaks. We then blew down XBM volume (-37degC dew point) and proceeded to rough out volume. PT170 is currently reading 5 Torr. We will valve the QDP80 out for the night and resume pumping tomorrow morning.

Had time to vent YBM and remove expansion spool on BSC8. BSC8 flange is currently covered with C3 soft cover with a healthy purge air flow. The spool is connected to west crane and will be transferred to LVEA high bay area tomorrow morning when we're in full laser safe mode.

I moved the annulus pumping system from BSC7 to BSC8 in preparation for door installation tomorrow morning.

Lilli S, Jeff K,

All valid low-fre and high-freq meas for the new 0909 model are processed together (including 0821, 0828, 0904x2, 0909x2, 0916 LF meas, and 0903 HF meas).

The sensing GPR fitting results are attached in the pdf files.

The script used to generate the GPR fitting is:
^trunk/Runs/O3/H1/Scripts/Uncertainty/process_allmeas_includingPCALXHFdata_writeGPRHDF5_model20190909-C.py

The resulting hdf5 file is:
^trunk/Runs/O3/H1/Results/Uncertainty/O3_H1_C_GPR_20190909_nofsQcorr_fmin20Hz_lengthscaleZp5_withPCALXHFdata.hdf5

The uncertainty plot was generated using this command line:

python3 RRNom.py --IFO=LHO --HDF5_A_MCMCresults=/ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O3/H1/Results/Uncertainty/O3_H1_A_MCMC_20190404.hdf5 --HDF5_A_GPRresults=/ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O3/H1/Results/Uncertainty/O3_H1_A_GPR_20190909_multi.hdf5 --HDF5_C_MCMCresults=/ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O3/H1/Results/Uncertainty/O3_H1_C_MCMC_20190904_nomconfig_fmin20Hz_finaltrial.hdf5 --HDF5_C_GPRresults=/ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O3/H1/Results/Uncertainty/O3_H1_C_GPR_20190909_nofsQcorr_fmin20Hz_lengthscaleZp5_withPCALXHFdata.hdf5 --modelPath=/ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O3/H1/params/ --modelFilename=modelparams_H1_20190909 --IFOmodel=modelPars --outDir=/ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O3/H1/Results/Uncertainty/ --plot1SigmaUncs --sampleNumber=1000 --seed=1234 --version=ref --gpsTime=1251687618

The online uncertainty code will start to use this new hdf5 for 0909 model.