John, Gerardo, Chandra Rough pump down on diagonal. We borrowed the control cable from Ymid turbo pump station to run QDP80 in remote mode. Current pressure on BCS4: 383 Torr
No issues outside of the ridiculous cable nests in the area.
I spent time staighting up the Optical Lever cabling where grouting will happen Thursday or Friday.
15:30 UTC FAMIS 3589
(Borja Sorazu, Alan Cumming, Giles Hammond)
This entry is an informative summary of some of the work we are doing/planning to do at Glasgow related to the monolithic suspensions and their violin modes R&D:
1) Identify actual fibre profiles of the installed fibres with actual masses.
2) Model aLIGO 'real' final stage suspension (with real fibre profiles) in ANSYS, to learn about the violin frequencies distribution and see how that can inform on identifying the higher order harmonics and their associated masses. Notice that only fundamental and fist harmonics are partially identified with actual test masses.
3) Use the model to estimate D factor for first 5 or 6 harmonics, and the energy distribution along the fibre length taking into account full fibre shape including necks and hopefully welds.
4) Use these energy ratios to weight the material loss factor equations. In this case, the material loss factor equations are used independently for each segment along the length of the fibre (therefore taking into account correctly the full fibre shape), and summed together and weighted by the energy ratio of each segment of the fibre, to give the full material loss of the fibre. Most probably we are talking about 500-1000 segments or so along each fibre's length.
5) The material loss factor equations we have used previously have used conservative estimates of parameters such as surface and weld loss, and subsequent measurements here in Glasgow have shown that the losses could be better than this, so we can give a range of possible losses (and hence noise spectra) using these and the FEA analysis, for the lower glass stage of the suspension, and compare these values with the measured Q's of the fundamental and higher harmonics of the violin modes. This information may help into understand if the low frequency noise has any thermal noise source.
16:20 Filiberto has locked and tagged the PSL Light Pipe
Laser Status: SysStat is good Front End power is 31.72W (should be around 30 W) Frontend Watch is GREEN HPO Watch is RED PMC: It has been locked 1.0 days, 19.0 hr 34.0 minutes (should be days/weeks) Reflected power is 3.035Watts and PowerSum = 24.92Watts. FSS: It has been locked for 1.0 days 0.0 h and 4.0 min (should be days/weeks) TPD[V] = 1.501V (min 0.9V) ISS: The diffracted power is around 9.648% (should be 5-9%) Last saturation event was 0.0 days 16.0 hours and 33.0 minutes ago (should be days/weeks) Please refer further, in depth, analysis of PSL trends to Jason, Peter or Rick.
Grouting of the remainder of the HEPI piers, transmitter and receiver pylons in the LVEA began on Monday morning by Reiboldt and Associates. The grouting has consumed more product than was originally expected and we have used up all that we had. I have ordered more grout and that should be onsite today, meanwhile, the grout crew will be out today. Progress to date includes, all of the HEPI piers on HAM 5 & 6, the large carbon fiber leaner on the south side of HAM 4, and the large stainless steel leaner pylon on X-Arm. Remaining items to grout in the LVEA include, 5 of the small transmitter pylons, and 1 each of the large carbon fiber and stainless steel leaner pylon. The plan is to finish these items in the LVEA tomorrow and move to the End stations afterwards.
TITLE: 03/16 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 Avg: 2 mph
Primary useism: 0.03 μm/s
Secondary useism: 0.26 μm/s
QUICK SUMMARY:LVEA is LASER SAFE
Yesterday afternoon I began the disassembly of Supply Fan 5 to investigate a very noisy bearing. I informed the control room that I was going to increase the flow on SF-6 from ~6200 CFM to ~ 8500 CFM to compensate for the reduced air flow of one fan being down. I will continue with disassembly today and if all parts are readily available, I hope to have the fan back up and running by the end of this week.
John, Chandra We isolated the beam manifold from QDP80 and are now backing turbo with scroll only. Control cable switched to scroll box. Safety valve set point on both X and Y pump stations is 5e-2 Torr. X: 5.94e-7 Torr Y: 1.82e-6 Torr
John, Chandra Started turbo on Y beam manifold with inlet pressure at 1 Torr and pump water cooling ON. X: 8.0e-7 Torr Y: 4.9e-1 Torr
John, Gerardo, Chandra Yesterday Kyle and Gerardo noticed the current on annulus IP on GV-5 was high (off scale). Today we noticed it was at 2 mA. We tapped on the vacuum piping around the pump and the current rose. Then we opened the valve to the annulus of GV-5's gate. The current rose to 6 mA and then quickly fell to 2 mA. Closed valve again to isolate GV-5 gate annulus. Now the IP is reading 1 mA.
Activity Log: All Times in UTC (PT) 23:00 (16:00) Take over from Ed End of Shift Summary: 03/15/2016, Evening Shift 23:00 – 07:00 (16:00 – 00:00) All times in UTC (PT) Support: N/A Incoming Operator: N/A Shift Detail Summary: Some commissioning work going on; does not need Ops support.
John, Chandra Now backing turbo pump on Xarm spool with scroll pump. Closed QDP80 valve on Xarm spool pump station. Closed vent/purge valves at both X & Y spools. Closed valves on Inficon gauges (PT-170 and PT-180). Pressure on PT-170 reading 1.56e-6 Torr.
[Aidan, Cao]
The TCS SIM model has been updated. Further details soon, but now there are calibrated channels for the arm powers. The values are in Watts. The names are:
H1:TCS-SIM_XARM_POWER
H1:TCS-SIM_YARM_POWER
Transition Summary:
Evening Shift 23:00 – 07:00 (16:00 – 00:00) All times in UTC (PT)
State of H1: IFO unlocked. Vacuum system work and grouting in the LVEA
Commissioning:
Outgoing Operator: Ed
TITLE: 03/15 day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC STATE of H1: Planned Engineering INCOMING OPERATOR: Jeff SHIFT SUMMARY:'Maintenance LOG: 14:15 Chris S; X-Arm beam tube sealing; 300 yards from end station. (morning work) 15:00 Grouting in LVEA 15:48 Hugh out to LVEA work around HAM2. Jim handling ISI damping. 16:30 Fil into LVEA to do WP5778 16:27 Bubba going to MX and EX with Cintas people. 16:45 NORCO on site with LN2 load for EX 17:00 Fil called from LVEA. Key Lock is intslled on TCS Y and by Kiwamu's instruction, ENABLED. FIl heading to do the same for TCS X. 17:15 Water Delivery 17:29 Second LN2 truck on site 17:43 Fil back from LVEA. TCS Y Key Lock done. Heading back out to execute WP5735 18:19 Joe, Sheila and Hang out to LVEA 18:40 Joe out of the LVEA 19:05 Truck here to pick up rental equipment 19:00 Fil out of LVEA for lunch 20:53 Carlos to reboot all workstations at end stations 21:18 Joe back into the LVEA 21:30 Fil and Manny out of LVEA 21:40 Joe out 21:55 Jeff to both end stations 22:18 Gerardo to MY/CP3 for manual fill 22:24 Fil out to LVEA to retrieve cables 22:30 Bubba out of fan room headed to EX 22:35 Gerardo is back from MY/CP3
Other than knuckle bustin head bangin pain, not too bad a job. Did find the data connector for the '3rd' corner satellite box seemed extra loose on HAM3. It has a gender changer as well so there was a lot of strain & wobble present. Fil saw that there was no fasteners tying the header to the board so it was just held with the pins and solder. He managed to get some screws in without too much disassembly--certainly better now. Say a hail-mary against 0.6hz.
1/2 open LLCV bypass valve, and the exhaust bypass valve fully open.
Flow was noted after 2 minutes, closed LLCV valve, and 3 minutes later the exhaust bypass valve was closed.
Next over-fill on Thursday, March 17th before 23:00 utc.
Chandra, John
We transitioned to Turbo pump on the X Beam Manifold at 15:00 local time.Pressure is currently 3 e-1 torr.
The Y Beam Manifold is currently at ~5 torr.