Thu Feb 22 08:06:46 2024 INFO: Fill completed in 6min 42secs

TITLE: 02/22 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:
    SEI_ENV state: Maintenance
    Wind: 3mph Gusts, 2mph 5min avg
    Primary useism: 0.05 μm/s
    Secondary useism: 0.23 μm/s
QUICK SUMMARY: Calm morning, prep for HAM8 work today and some cleanup from CDS switch work yesterday.

Jonathan, Erik, Dave, Tony, Ryan, Patrick, Dan

Today we transitioned to all the new switches in the MSR.

The order was:

sw-msr-ops - this is the workstation and FOM switch
sw-msr-server3 - auxillary servers, epics gateways, WAP controller
sw-msr-server2 - auxillary servers, back channel connections from the file servers
sw-msr-core - the main core network

Dan Moraru came up to help us make sure the file servers where is a safe state when before we touched switches related to them.

On the network side we ran into a few configuration issues but have been able to fix those.  A few ports didn't get put on the right vlan, that was fixed.  We need to enable directed broadcasts on a number of networks to allow the EPICS channel access broadcasts to go through.  The fmcs epics ioc machine had a bad default gateway, we had to correct that before it would work (we do not know why or how it worked yesterday).  Some issues with loose cables that were causing connectivity issues for fmcs.

Tony, Ryan, and Dave did some work on cleaning out old items from the racks.  We removed an old fujitsu switch, a broken qlogic switch, the old (dead) router, some retired servers, and the old sw-msr-ops, sw-msr-spare, sw-msr-server1, sw-msr-server3 switches.

Tomorrow we will remove the old core switch and do more cleanup.  We may have short outages, of some systems, but do not expect a general outage.

The mx, my, and mechancial room switches are passing data, but we are not able to log into them.  They were working on the test bench last week.  I have racked up a test switch and connected it to the core (via a temporary link on port 48) to try and replicate the setup of these switches and get this issue figured out.

We went through the configuration of all the icx switches and made sure that we had a consistent spanning tree setup.  This should help clear up some odd network issues we have seen in the past.

We also moved the connection to the file servers directly onto the core switch.

We had front end system crashes today.  Dave or Erik will add a comment detailing those issues.  Dave restarted the EDCU while we were doing recovery of the front end systems to force it to reconnect to EPICS channels while we worked on issues with the fmcs ioc.

Today's activities:
- HAM7 pumpdown status: ~9.7E-7 Torr
- Corner pumpdown: HAM6 turbo was switched on, and valved in; it helps a lot - as anticipated - especially with the semi-isolated HAM6 volume. The pressure is ~1.1E-6 Torr, ~26 hours after the HV pumping started
- EX pumpdown status: 3.1E-8 Torr: the post-vent RGA scan is ready; the results show that the chamber is OK - compared with past RGAs. Another bakeout is necessary, see details here: https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=75918. The GV will remain closed during FAC works (1-2 weeks)
- HAM8 works: the chamber closing and pumping is now postponed to early-next week

I just ran a script that sweeps SHG crystal temperature. This test requires TTFSS, PMC, and SHG locked. PLEASE DO NOT TOUCH THE SQUEEZER. PLEASE WALK GENTLY NEAR SQZT0. The duration of the script is ~2hrs. Star time is 16:40.

The script sets the crystal temperature from 29C - 41C at 0.5C increment. We hope to replicate the phase matching curve done by a SURF student Nathan Zhao (P1400193 Fig 23). The script can be found in /opt/rtcds/userapps/trunk/sqz/h1/scripts/SHGphasematch.py 

TITLE: 02/21 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:

CDS work has largely concluded and suspensions/seismic have been put back into their normal GRD settings.

With some exceptions:

• FMCS Epics still down
• HEPI Cornerstation pump controller still down
• Inevitable "other"

Additionally, the LVEA is now LASER SAFE

LOG:

Randy, Jim, Eric, Mitchell, Tyler

Last week work on the EY wind fence wrapped up. Several of the horizontal cables came loose alog 75543 in the high winds back in January. This likely happended due to lack of proper torque on the cable clamps.

The horizontal cables were re-strung and then tentioned. All horizontal cables received a third cable clamp. Lock tight was added and the clamps were torqued to 45 foot pounds. In some cases the smaller cable that loops through the gromets and around the horizontal cable needed to be addressed. Although it looked bad there was very little damage. One panel had the veritcal edge torn away from the field of the panel. This means that the vertical looping cable is no longer connecting the panel to the upright post for about half the panel. The horizontal looping cable is still attached through the gromets and attached to the upright post.

WP 11707

SQZ Chassis 5 modified to add missing ground connection for binary input and output signals. Ground cable connected from EL2124 (Middle Rail, Terminal 2, Signal labeled "GND") to Adapter 6 (Pin 19).

Serial Number S2300256

F. Clara, D. Sigg

CDS Outages are Ongoing

• Ctrl Rm workstations are not online
• Reservation system has moved to my personal computer for the day (find log so-far below)

Yesterday we installed a new switch in the mechanical room but had to revert the setup due to issues with data drop outs.  This appears that the fiber run to the switch is unable to support 10G.  Today I moved the connections back to the new switch and am running the switch at 1G instead of 10G.

When we put the new core switch in this switch (sw-mech-aux) will need a slightly different configuration.  I have pre-programmed that on a different fiber port.  So when we put the new core switch in we will need to go to the mechanical room and move the optic and fiber from port 1 to port2.

As a reminder we are continuing work on the CDS network today.

Today is the day we are generally disruptive.  The control room and will be impacted and unusable at times today.  The main CDS network will also be interrupted for periods today.

The main interruption of the network will not be first thing.  However the control room workstations will interrupted in the first step.

Wed Feb 21 08:04:22 2024 ALERT: Fill done (errors) in 4min 19sec

Before the fill I noted the TCs were very high, +35C. I raised the trip temp to -60C, but as it happened it turned out not to be high enough and TC min was -56C. With the discharge line pressure up at 0.7 and the TCs flatlined, I manually canceled the fill.

Gerardo thinks there is ice build up, the dewar was filled yesterday and I noticed vapor at the discharge.

Today's activities:
- HAM7 pumpdown status: ~1.1E-6 Torr
- HAM7 Annulus system pumping cart has been switched off, it is pumped now only by its Ion-pump
- Corner pumpdown: the OMC and Y-manifold Turbos have been switched on, roughing pump has been switched off; HAM6 turbo is coming tomorrow. The pressure is already ~4E-6 Torr
- All the metal valves have been closed in the corner LVEA
- EX pumpdown status: 3.2E-8 Torr: the post-vent RGA scan is ready, the results will be in the comment comment section, once they are published. The comparison with past RGAs is also coming next week. If the results will be considered satisfactory, the Ion-pump will be valved in. The GV will remain closed during FAC works
- HAM8 works: the chamber was vented with purge air; the Annulus system was vented with Nitrogen; The Y+ door has been taken off; the Y- 12" blanks have been taken off

Nutsinee, Vicky, Daniel, Naoki

We brought back the SQZ laser power (PMC input power) from 30mW to 670mW and locked the PMC with s-pol. The PMC trans power is 420mW and the PMC transmissivity is 60%. So all the power downstream of PMC reduced by 40%. The PMC TRANS DC POWERMON is calibrated into 420mW.

Then we aligned SHG. The SHG mode matching is 82%, which is slightly lower than before.

To increase the SHG IR injection power, we adjusted HWP for SHG path. The SHG IR injection power is now maxed out at 200mW. The SHG GR DC POWERMON is 37mW, which is lower than before 40-60 mW.

To increase the CLF power, we replaced the pick off mirror just before the CLF fiber from R=10% to HR mirror. The CLF power before the fiber is 135uW and the CLF REFL power in SQZT7 is 20uW. The CLF LAUNCH DC POWERMON is calibrated into 135uW.

TITLE: 02/21 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:

Primary Ongoing Activities

1. CDS Work is unfinished (facing some delays that started with the last switch they went to in the mechanical room).
2. HAM8 Vent is done
3. SQZT work is ongoing

Control Room Log (02/20) so far..

• 16:00 SUSEX and ISI to safe states
• 16:30 Dolphin EX fencing from ctrl rm
  • Had to disable long range switch that supports EY, EX so EY no longer communicating with End Station
• 17:00 UTC ISI EX Stage 1,2 watchdog tripped - CDS Work ongoing
• 17:00 UTC SEI EX SW watchdog tripped
• 17:57 UTC HAM8 SEI set to offline (in prep for work)
• 18:39 -
  • Dave, MX
  • Fil, Tony, Jonathan, Ryan S, EX
• 19:28 UTC - Xarm is Done - Moving to FCES after lunch

• 20:15 Richland bomb squad doing exercises - won’t affect us.
• Morning-Noon: Two Tours
• 20:38 UTC - CDS FCES CDS Work Done
• 20:40 UTC - CDS EY, MY CDS Work Started
• 21:14 UTC - SEI Keeping eye on HAM 5,6,7 SEI States per VAC work
• 21:19 UTC - SEI Restored HAM1-4, BSC2, IY, IX back to “normal” seismic states
• 22:00 UTC - VAC HAM 8 Vent Complete
• 22:43 UTC - CDS Y-Arm Work is now Done (and recovered)
• 22:45 UTC - CDS Now moving onto mechanical room - the last switch of the day
  • This did not go as expected and they will need more time for this tomorrow, potentially undoing some work from today (morale seemed high though).

LOG:

Fil, Luis, Camilla. FRS 26828#c11 Previous troubleshooting in alog 74951, 74750.

Today Fil went onto the HWS table and verified the HWS cameras are connected straight to the external power supply (photos in FRS26828#c8) via cables connected together. The HWS camera fiber CLink box is powered by the HWS breakout chassis D1200934 (originally designed to power cameras too).

Fil theorized that the HWS grounding is due to the power supply to fiber CLink connection grounding the cameras! With a multi-meter, we verified the HWS camera is grounded to the table when the CLink power cable is connected but when we disconnect CLink power, the camera is not grounded to the table (has Kapton tape and plastic bolts).

Step 1 (Completed): I removed the grounding cables from the HWS external power supply as Luis suggested in FRS 26828#c11, to avoid us holding the cameras negative terminal at mains ground. Photo of current connections attached. 

Step 2 (Planned): After verifying step 1 doesn't effect the combs (need overnight "quiet" data), Fil will make a new cable to power both the camera and CLink's via the external supply (14V is fine for both). 

The previous timing master which was again running out of range on the voltage to the OCXO, see alogs 68000 and  61988, has been retuned using the mechanical adjustment of the OCXO.

Today's readback voltage is at +3.88V. We will keep it running over the next few months to see, if it eventually settles.

Naoki, Camille, Julian, Rahul

Summary: We measured beam profiles in HAM7 and HAM6 using the SQZ beam, after the PSAMs offloading work from 75677 75709 and the alignment work from 75732. We noticed that there is a lot of astigmatism on the beam in HAM6, but not in the HAM7 location that we were able to reach with the profiler. 

Details:

In HAM6 we measured at three locations marked by the letters a,b,c in the sketch that Julian will attach. The red lines in the sketch show the irises. 

Location 6A is 1.75 inches from the iris, Location 6B is 2 inches from the iris (closer to OM1).  At location 6C we measured the beam in reflection off OM1, 23.25 inches after OM1.  (The fast shutter is further in the -Y direction in chamber than what is shown in the CAD drawing).  We also would like to measure at position 6D, once the second iris is removed. 

We also measured beam profiles on the -X side of the HAM7 table, location 7A is 6.25" in the +X direction (closer to ZM5) from the iris, 7B is 8.25" from the iris in the + X direction, and location 7C is 12" from the iris in the +X direction.  We weren't able to move the profiler further into the chamber without blocking the beam heading towards FC1.

We measured 13.5% widths, with A1 as the vertical axis and A2 as horizontal. 

* strain guage still drifting

Stll left to do:

• Measure distance from HAM6 first iris to OM1. 
• Measure distance from HAM7 iris (on -X side of table) to ZM5.
• take a better photo of the beam position on ZM5.
• try to put beam profile in location of iris near OM1 (location 6D).

Useful distances from Don:

Don Griffith sent us some useful distances in HAM7 which are useful for interpreting these measurements, based on the CAD model that he updated in in March 2022 based on the as built photos of HAM7 (D1900365-v1). 

• B:M4 (last optic on VIP) to ZM4 = 1086.36mm
• ZM4 to ZM5 = 1681.23mm
• ZM5 to Beam Diverter + 1183.54mm
• ZM5 to Edge of Table = 1822.70mm
• ZM5 to ZM6 = 4680.61mm