TITLE: 02/14 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY:

I covered first part of shift & handed over to Patrick as I assisted with HAM6 in-vac cable work.  Main activities of the day so far:

• LN2 boil-off inside MY's CP2.
• ETMy SUS binary troubleshooting
• HAM6 VOPO prep work (installing arm, in-vac cables)

LOG:  (items in bold are ongoing)

• Before 16:00 - 17:40:  HAM6 Arm installation starting (Bubba, Mark)
  • 16:55-18:12 TJ joining crew + VOPO install prep
• 16:35 Heading to H1PSL room to continue/finish plumbing upgrade work for 70W (Jeff B)
  • Oberling Heading out to H1PSL room
• 16:45 CP4 work begins (Kyle)
  • 18:44 Chandra joining
• 16:48 EY troubleshooting SUS Binary (Fil)
  • 17:19:  This brought up an "ETMy Hardware Watchdog", but Dave said this was not a "real" one.
  • Also restarted Verbal to see if we get this alarm and we did get the HW & SW watchdog alarms
  • 20:15 out for lunch, said they might need to reboot the IO chasis (Fil)
• 16:50-17:27 EX replace ALS WFS chasis w/ one swapped out yesterday (Mac)
• 17:00-17:18 Laser diode room work (Jason & Peter)
• 17:54-18:56 H1 PSL room to continue work (Jason & Jeff B)
  • 18:27-19:21 Peter joining them
• 18:17-19:27 Working on HAM6 top cable feedthru (Hugh)
• 18:33 Topped Off Crystal chiller as PSL team was working on PSL chiller (left stopper off).
• 19:25 LVEA for dog clamps & covers (Travis)
• 20:16 SUS ETMy work continuing (Travis & Betsy)
• 20:50 Cell phone alarm work (Dave)
• 20:51 HAM6 In-Vac Cabling work (Hugh, Niko, Corey)
• 20:52 Handing Off to Patrick

Bubba G., Mark D., TJ

The install arm has been installed on the HAM6 South door for the OPOS (VOPO) install. Bubba and Mark started early to put the flange protectors on and hunt for hardware. I showed up just as they were lifting the arm into place. Both the arm and the HAM Structure Lift (D1001664) went on without any issues. I gave the arm a good cleaning and then put a cover on it and locked it into place. It should be ready for use next week.

Big thank you to Bubba and Mark!

TITLE: 02/14 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    Wind: 5mph Gusts, 3mph 5min avg
    Primary useism: 0.06 μm/s
    Secondary useism: 0.23 μm/s
QUICK SUMMARY:

• Quiet morning thus far with only light snow/ice patches observed on drive/walk in. 
• The DMT seismic FOM appears to be dead again (One of them works and the other is not.  I'm trying to remember what the issue was last Tues/yesterday and I believe Dave mentioned to TJ/myself something about a kerberos ticket issue).
• ISI Config has been in the Large EQ NO BRSx/y since yesterday morning.  Since no one needs H1, will leave in this state (consulted with Jim about it this morning).
• L1 had about 7hrs of 90Mpc over night.

D Sigg, TVo

Cleaned up the naming conventions to make the heater library generic and added said library to PLC3 in the corner station.  Re-scanned  the system manager and linked the PLC variables to the terminals.

Sheila, Terry

We have swapped the input/output coupler on the H1 OPO.  The original optic was M1 from E1600051, and we have swapped it now with E1700299, which has a reflectivity of 98% for 532, so that we can use our OPO as a reference cavity.

Although this optic is M1, the mount it is on is labeled M4 because the other M1 mounts were used already.  We found that the optic was misaligned in pitch when we tried to swap it.  We measured the distance between the prompt reflection about 10mm above the leakage beam at a distance of 500mm from the cavity (we are using the 1064 beam which was aligned into the input/output coupler for the escape efficiency measurement), meaning that the beam had a 1 degree misalignment or that the mirror was pitched by +0.5 degrees compared to the original optic. 

We think the problem is the wedge of the optic.  There is an arrow on the barel which is supposed to indicate the thick part of the optic, for the original M1 that arrow is on the side of the optic farther away from the crystal, so that the wedge is horizontal.  For the new coupler, it is rotated about 45degrees clockwise from that position (the arrow is on the upper half of the barel, away from the crystal.)  Since the wedge is a half a degree this probably explains the misalignment we see. 

There is no way to adjust pitch in these mounts, but Hugh brought us some class A shims that were used for ISIs.  Hugh suggested that we place the edge of the shim half way along the front feet on the mirror holder (D1600063), so that we would be able to adjust pitch by sliding it back and forth.  We used a 5 thousandths of an inch shim and were easily able to adjust the optic pitch.  The field used for the escape efficiency measurement is again aligned to the cavity. 

Travis and Kissel spent the morning measuring violin modes of the new ETMY suspension (Kissel is digesting data).  In the afternoon, Travis and I worked on aligning the reaction chain well enough that it would suspend without mechanical interference.  We paused the round when we got the oplev main reflection beam (2nd beam up due to wedge of ETM16) on the oplev off center by under 100urad in pitch and yaw.  We then realigned all of the top stage tablecloth brackets and install and aligned the top BOSEMs.  After a few more rounds of iterative adjustment and alignment work, we repeated the process on the AOSEMs inside the PenRe mass.  A few quick P and V TFs show that both the main and reaction chains are free, but will recheck tomorrow.  Next up... mine for overnight spectra from tonight in order for Kissel to pre-tune the BRD assemblies that are due to be installed next.

Overall transmission: 95%

About 95% of the power going in is S-pol so the transmission was calculated based on everything that came out over S-pol power that went in. The half wave plate at the output of the isolator hasn't been fixed so it still spits out mostly P-pol. About .5% of what came out was S-pol (a half wave plate has been installed to fix the polarization).

Isolation: -30.5 dB

Usual set up: Mirror facing flat at the output and beam splitter at the input. I found a non-polarize beam splitter for 1064 this time. Assuming no losses in the reflection I measured the power that came back through the isolator and reflected off the beam splitter. Taken the known input power and the percentage of the reflected power before going into the isolator into account I calculated the total power that came back through the faraday.

J. Kissel, K. Kawabe

I've taken L, P, and Y driven transfer functions of the final/bottom/optic/M3 stage of H1 SUS PRM to gather what the longitudinal-to-pitch cross coupling "typically" looks like for an HSTS. Also, I've compared the results against the HSTS dynamical model, just because I'd never focused on how poorly the off-diagonal elements of the model reproduce reality. Keita had asked me for the information to help validate the recent PRC spot position measurement LHO aLOG 40477.

Attached are the results and the hacky, non-svn'd script used to generate it. #slapsownwrist

Data lives here:
/ligo/svncommon/SusSVN/sus/trunk/HSTS/H1/PRM/SAGM3/Data/
2018-02-13_2350_H1SUSPRM_M3_WhiteNoise_L_0p01to50Hz.xml
2018-02-13_2350_H1SUSPRM_M3_WhiteNoise_P_0p01to50Hz.xml
2018-02-13_2350_H1SUSPRM_M3_WhiteNoise_Y_0p01to50Hz.xml

In the hope of making our lives simpler, I have created a wrapper bash script for svn commands. It checks the current working directory to determine which version of svn was used to create the directory, and then runs the appropriate version of svn client. It passes all the arguments given to itself onwards to the svn binary. The hope is that this is all totally transparent to the user.

The script is found in /ligo/cds/userscripts/svn which is a link to /opt/rtcds/userapps/release/cds/common/scripts/svn.bsh

If /ligo/cds/userscripts is ahead of /usr/bin in your PATH environment variable, you will be calling the wrapper script every time you run svn.

If you need to reconfigure your PATH to make this so, please add the following line to your .bashrc file in your home directory

export PATH=/ligo/cds/userscripts:/usr/bin:$PATH

you can confirm the path by typing 'which svn' which should return '/ligo/cds/userscripts/svn'

Now that the svn client version is tied to the working directory's version, you can find the version by running "svn --version"

For example, in /ligo/svncommon/SusSVN/sus/trunk/QUAD/H1/Common
svn, version 1.6.17 (r1128011)

whereas in /opt/rtcds/userapps/release/cds/common/scripts
svn, version 1.8.10 (r1615264)

code-listing

TITLE: 02/13 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY:
LOG:

• 1508 Bubba, Mark to LVEA to remove HAM6 S door
• 1613 Christina to LVEA
• 1633 Jeff B and Peter to PSL enclosure
• 1634 Chris and pest crew to EY, done at CS
• 1645 Fil to EX to start WP#7345
• 1646 Bubba, Mark out
• 1648 Jason to PSL enclosure
• 1701 Ed to LVEA to work on the TCS power supply
• 1701 Norco truck at gate going to 8514375
• 1701 Marc to MY
• 1704 Peter out
• 1718 Jeff K and Travis to EY to resume violin measurements
• 1730 Marc back
• 1734 Peter to PSL enclosure to drop off a tool for Jeff B
• 1736 Fil back
• 1738 Dave restarting OAF model
• 1743 Sheila, Terry to Opt Lab
• 1759 Ed out
• 1804 Betsy to EY
• 1805 Karen to MY
• 1810 Jason, Jeff B out
• 1822 Ed, Fil to CER
• 1840 Fil to EY to join the crew there
• 1852 Karen leaving MY
• 1910 Marc to CER
• 1921 Jeff K, Fil back from EY
• 1932 Marc out
• 1940 Sheila, Terry out
• 1957 DAQ reboot
• 2015 Travis and Betsy back EY
• 2101 Sheila, Terry to Opt Lab
• 2123 Ed to CER
• 2131 Marc, Richard, Fil to EX
• 2132 Travis and Betsy to EY
• 2207 Jason, Peter to PSL rack
• 2210 Nutsinee to Opt Lab then SQZ Bay
• 2221 Marc, Richard, Fil back
• 2238 Fil to CER to swap some cables for more ITMY investigation. Suspension brought to SAFE and SEI to DAMPED
• 2240 Marc to EX to repair demod chasis
• 2309 Marc back
• 2310 Nutsinee out
• 2314 Jason, Peter out
• 2325 Sheila, Terry out
• 2348 Jason, Peter ro PSL racks
• 2358 Nutinsee to SQZ Bay

J. Kissel, T. Sadecki, B. Weaver

Betsy and Travis are beginning to resurrect the top mass OSEMs on the newly re-suspended H1 SUS ETMY. In doing so, they've found R0 F2 OSEM's Test/Coil Enable BIO Frozen in OFF Position. Toggling the test/coil enable (TCE) state from 0 or 1 moves all of the rest of the R0 TCE switches, but F2's remains in the stuck position. This could be either the readback stuck, which wouldn't be a priority to fix, or it could actually be the switch that's dead, which would be a major blocker for activity. 

I attach a screenshot of the M0 / R0 corner of the binary IO screen showing the problem.

Power cycle h1oaf0 in attempt to fix h1oaf overrun issue.

h1oaf0 was power cycled. The sequence was: kill models, take h1oaf0 out of the Dolphin fabric, power down cpu, power up cpu.

Note: no software was changed, no modified filter files were loaded.

The only restart issue was a brief IRIG-B negative excursion for h1iopoaf0, which invalidated the DAQ data and IPC channels for about 5 minutes.

Unfortunately, this does not fixed the h1oaf0 overrun problem (which started when h1ngn was decommissioned).

DAQ Restart

The DAQ restart was to:

use the latest H1EDCU_HEPIPUMPEX.ini

use a new H1EDCU_SEISMON.ini which I created from the new 6-eq_event code.

WP7346 Vacuum Alarms Reconfiguration

Chandra, Dave:

The cell phone alarm system was reconfigured to:

remove CP4 LN2 pump level alarms (value and error channels) from the system

increase CP4's vacuum gauge alarm level from 1.0e-07 to 5.0e-05 Torr.

The removal of CP4 LN2 pump data has impacted on the daily CP reports, which will require a code change later today.

This morning at 9:20am local I reduced CP4's LLCV setting to 0% open to cut off LN2 flow into pump reservoir. Kyle connected the HAM 6 backing cart with safety valve to CP4's turbo and will valve in turbo this morning before the pump warms up too much. Currently CP4 is at 58% full. Dave B. readjusted text/email alarms.

Mark D. is removing insulation from GN2 lines - sections that fall within bake inclosure.

Ken is removing electrical conduit, wiring, and supports and will continue this work throughout the week.

Kyle and Gerardo are stripping GV 11,12 of its wiring, controllers, annulus piping, etc.

I'm working with bake enclosure contractor on last minute "gotchas."

J. Kissel, T. Sadecki

Travis and I used a HeNe Laser, QPD, and speaker array to begin characterizing H1SUSETMY's PUM-to-TST fused silica fiber violin modes. We were able to complete the characterization of 3 of the 4 fibers, but we began to have (we believe to be) electronics problems during characterization of the last fiber, so we've left the set turned off but otherwise as is, in hopes the the gremlins will go away by tomorrow morning to characterize the final fiber.

I've exported the data, and intent to process it in detail as I've done for ITMX (see LHO aLOG 39163), but for now preliminary results are as follows (under the "Answer" column):

Freq resolution 62.5mHz
(400 lines with 25 Hz span)

+X / +Y (S1400157; Partial Suspended Fundamental: 504.5 Hz)

	Freq Band / Hz	Answer / Hz	nAvgs	Exc Amp / mV		FileName
1st 	490 515		504.8 		10 	250 		0003
2nd 	990 1015	999.8125	10	250 		0004
3rd	1460 1485	1471.3125	10	250		0005
4th	1975 2000	1980		10	250	        0006
5th	2450 2475	2460.3125	10	500 		0007
6th	2925 2950	2939.625	10	500 		0008

-X / +Y (S1400159; Partially Suspended Fundamental: 503.0 Hz)

1st	490 515		503.625		10	500		0009
2nd	990 1015	1000.3125	10	500		0010
3rd	1460 1485	1470.375	10	500		0011		
4th	1975 2000	1979.4375	10	500		0012
5th	2450 2475	2459.4375	10	500		0013
6th	2925 2950	2939.375	10	500		0014

+X / -Y  (S1800486; Partially Suspended Fundamental: 513.25 Hz)

1st	500 525		512.75		10	500		0015
2nd	1000 1025	1016.8125	10	500		0016	
3rd	1490 1515	1500.375	10	500		0017
4th	1975 2000	1979.5625	10	500		0018
5th	2450 2475	2459.375	10	500		0019
6th	2925 2950	2939.3125	10	500		0020


So far, the difference between fully suspended and partially suspended values look consistent with the ~0.5 Hz shift down in frequency as seen on ITMX.

Note, we tried upgrading the HeNe laser to a spare fiber-coupled optical lever laser as requested by Angus in LHO aLOG 40300, but the output coupler we were given collimated the beam to much larger than we needed (a ~10mm beam for a ~3mm QPD). Also, we were seeing a large amount of glitch-like impulses while taking the ASD of the QPD SUM output. A scope, time-series reading of the QPD output showed no glitching at any time scale. Suspecting the new laser, we tried out the old, supposedly noisy one. Simultaneously, I found that the SR785 input settings were DC coupled, and switched to A-B with AC coupling. Either the laser swap or the AC coupling fixed the problem, but since we were on a roll, we didn't switch back to the new spare optical lever laser. All of today's measurements were taken with the old HeNe laser.