Re Log 780 Yesterday Jim and I got half of the hardware in place. This morning Mick and I did the north Support Tube. We changed out a washer on the Long to short bar connection and added a second Hose band around for more security. All set for transport.
JimB, MarkB, RobertL, Anamaria Yesterday we managed to get the SUS test stand named bscteststand2 working with RCG 2.0. We copied a bunch of things from the current working LLO test stand which of course resulted in a few hours of black magic mostly from Jim to essentially find all the X2s and get them to be X1s. Took us a while to get the daqd and awgtpman working again even if the models were compiling pretty early. Apparently there was also an older test stand running in parallel, and that had to be modified to not run contradicting processes... The iop model is: x1ioptstsus1 (in userapps/CDS directory) The qual model is: x1susquad We copied and modified the LLO medms JeffK had made for this. We still have some work to do on scripts and medms, but at least we have the capability of reading channels and doing stuff with them. As trivial as it may seem...
Jim, Hugh We installed two of the four fixtures Jim designed on BSC6. The parts are shown in the first .jpg below. The second image shows Jim doing the in-situ assembly. The large disc plate fits over the Support Tube end and rests on the broad face of the Expansion Bellows outside the bolt circle. The last images show detail of the remaining. The long bar bolts into the round plate and the small block bolts to the slots at the other end of the long bar. This short bar catches the back side of the Chamber Flange, actually sitting on the bolts. The long hose clamp holds the bar inward preventing it from slipping off the back side. By having this assembly on each end of the Support Tube, it is prevented from shifting longitudinally although we don't really expect it to want to do this. The original Bellows Shield remains in place and the large diameter disk and the long bars provide some additional protection during transport. We'll finish the other side tomorrow. Thanks to Zac for the parts clean up.
We measured the launch angle and the height of the stage 0 blade posts. The measurements are in good agreement with specifications. An error of 0.02° on the launch angle can be compensated by adding or removing 7 pounds per corner.
Today we moved the Quad 1 Upper Structure and Lower Structure into their respective storage containers. The containers will be moved into the SUS controlled storage area in the LVEA. Upper Structure gross weight 419 Lbs Upper Structure storage box 150 lbs Upper Structure weight 269 lbs Lower Structure gross weight 806 lbs Lower Structure storage box 290 lbs Lower Structure weight 516 lbs Note: Upper Structure weight does not include the Cross Braces or fasteners. The Lower Structure weight does not UI BOSEMs, Pen AOSEMs, and implementation ring.
(Corey, Jeff G., Jim, Vincent)
o Jeff broke most of the helicoil tangs on the Optics Table.
o Measurements were made on the (3) Stage0 Blade Posts with the Romer Arm.
o Blade Posts were installed on Stage0 (although they couldn't be torqued down because we didn't have a socket for these BIG 5/8" socket head cap screws).
o Continued wrapping/bagging/tagging HAM parts, to clear room for BSC parts.
(Corey, Hugh)
Final few hundred helicoils were installed on the BSC ISI #1 Optics Table---that's (3,225) 3/8"-16 helicoils & (18) 1/4"-20 helicoils.
Next up, breaking 3200+ Helicoil Tangs: "Ain't No Party Like a Tang-Breakin' Party!"
Ski changed the RO filter Removal of concrete at HAM8 Scheduled activities from morning meeting: cleaning at mid and end x HEPI prep at BSC4 drilling holes for HEPI piers at HAM7 Attached is a plot of 5 micron dust counts from 14:00 to 23:00 UTC. The spike at location 9 to ~1,810,000 particles per cubic foot occurred at approximately 15:59:07 UTC. Breaking concrete began around 16:16 UTC.
BSC ISI---Several hundred helicoils installed in Optical Table. HAM--Unit#3 loaded, floated, balanced and ready for testing. BSC8 HEPI Housings Installed.
Today's Activities: 9:15 - Apollo pier work began on HAM7 cleaning at Mid and End-X Kyle to soft-close GV5 H2 PSL enclosure construction HEPI post setup on HAM7 HEPI pier installation at BSC8 Dust Levels: Near the HAM7 work, dust monitor DST9_5 (5 micron monitor) had counts hovering around 10000 cts throughout most of the day with a spike of ~71000 cts lasting a few minutes during cleanup around the area at about ~15:30 PST.
BSC 8 HEPI install is completed. Ran into a little hiccup where the frame's front brace for the foot interferes with the cross brace. The pictures attached show the problem. It should be an easy fix during the pre-positioning to check and make sure it won't interfere.
The exterior and interior walls of the enclosure have been primed and will be painted tomorrow. Feedthru holes were drilled and PVC pipe was installed on all but 2 feedthru locations. Holes for EMT conduits were also drilled into the roof, at 3 of the 4 locations. No HVAC work today.
There were several dust spikes above 20000 in both 0.3 and 0.5 micron, but Apollo was also drilling by HAM7, which contributed to the dust counts.
We built the front end code and DAQ code from the latest version of advLigoRTS on h2build. We also built a production h2susetmy machine, which has the production IOChassis and timing systems. The build process was documented, and we are writing a "LHO front end models builder guide" in preparation for the first BSC controls system.
Throughout the day: H2 PSL enclosure work continues HEPI installation on BSC7 continues HAM 7 drilling for HEPI posts Jodi & John to End Y to check on caulking being done on ceiling tiles ~10:00 clean room moved to ham 7 - particle cts jumped to ~1000 richard to bsc7 to work with electronics ~1:00 Jodi to X-mid for some inspection filiberto and paul to mid-y looking for parts
The Pump Servo commissioning at LHO continues. A lead was placed inside the servo box on the circuit board at TP7, which is after the gain and is the signal the DAQ receives. The leads were then plugged into an SR785 and an oscilloscope to monitor voltage signal and to take an amplitude spectrum of the signal with and without PID control. Spectra were taken from the pressure sensors #1 and #4. Sensor #1 being before the fluid reaches the accumulators and #4 being after the final accumulator. Sensor #4 monitors the pressure as it leaves the pump station. Data was also taken of the pressure sensor outputs without pressure in the system as a baseline noise measurement of the sensors. The first plot is of Sensor #1 and has the PID ON/OFF and sensor noise traces on it. The second plot is of Sensor #4. The data taken with Sensor #1 has some double resonance peaks at about 10, 20, and 30Hz while the data from Sensor #4 shows these resonances as a single peak at the same frequencies. Sensor #1 also has a peak at 5Hz that is not present in the data from Sensor #4. The data also shows little to no improvement in the PSI fluctuations with the PID control ON or OFF. However, these PID parameters were very conservative with the parameters of P=2, I=1, and D=0.1. The sensor noise is also very close to the fluctuation with and with PID control for frequencies above 2Hz. It looks like the limit on controlling the pressure is the fluctuation of the sensor readout itself. However, the pressure fluctuations are below the pump servo goal, except for the 10, 20, and 30 resonance peaks present on all the traces.
Condensate lines were added today. They do not fully extend to the LVEA wall yet. More finishing work on the drywall, and a second hole was added for the return air ducting on the roof.
Dust counts in the low thousands. I'm not including the beer garden in this plot because HEPI installation work on BSC8 would skew the data.
Work continues on BSC 8 HEPI install. The final corner (NW) is being drilled out and tapped, but special consideration has been made for the calibrated leaks and RGA near the pier as seen in the pictures.
Today's Activities: H2PSL Enclosure construction HEPI pier installation at BSC 8 10:00 – contractors craning over beam tube at Mid-Y 2:30 – delivery and on-site pick-up from diamond freight 3:30 – tour group stops by the control room
Betsy and I finished cleaning the ~30 optics I have in hand right now for assembling the TRANSMON table. Few more optics are coming next week. After a couple of trials, and with the help of Margot who was on site this week, we think we converged on a good practical procedure (ref: E000007-v2): - Do the cleaning in the bonding lab (nice and clean), not the optics lab - The sequence is: liquinox, DI water, methanol, nitrogen blow-off, but the important point is to make sure that your gloves are clean each time, as we noticed that gloves are really the main cause of contamination (DI water on gloves when doing methanol, etc). With 2 people is easy, as one person can do the liquinox + DI water, and the other one can do methanol + nitrogen. For one person alone, the best strategy we found today is the following: do liquinox + DI water + methanol for all the optics with the same gloves, than change gloves and repeat methanol + nitrogen blow-off if necessary - Use a lot of DI water (more than 30 seconds) and get rid of liquinox on your gloves too - At the end, if there are some particles or streaks left on the optics, wipe with methanol (rarely needed) We also tested first contact on a small 1" optic. Before I left, I put a couple of clean old REO mirrors (2" HR1064) in the new Empire West clean boxes I bought (I wiped the boxes first). I will take a look next week to see if they are still clean. I left all the optics in the bonding lab (see pictures). As not all these optics are scribed (some are borrowed from iLIGO ISC and squeezing), it would be helpful if they could remain as I left them, so I can keep track. In case you need to use that bench, please let me know.
I cleaned the remaining optics for the TRANSMON table. 4 hands are better than 2, but it worked out anyway. We should be able to start baking next week (waiting for the optics holders).
