Scott & Ed, We got the last Bellows on this morning and completed the torquing and Table leveling after lunch. The WHAM6 is ready for leak checks. HAM Bellows SNs D972611: NW #75,SW #81,SE #80, NE #85
• 0700 LVEA in laser hazard all day.
• 0700 Y-end: Overhead Door crew onsite all day. Dust counts occasionally non-zero as fans are disengaged.
• 0900 Y-end: Dale, Jodi, Terry, and Christina filming contamination control video. From the overhead cameras the cinematography looks excellent.
Inspired acting but plot difficult to follow. Would have been better with a love interest. 3 stars.
• 0930 Cheryl V and I/O team working in and around H1PSL enc and HAM1. Frequent dust alarms.
• 0930 Apollo crew working on finalizing septum hardware install (BSC2/HAM4)
• 0900 Hugh installing last bellow on HAM6
• 1045 Jim B power-cycling I/O chassis in LVEA (H1SEITST)
• 1100 Filiberto working inside laser curtains at HAM1 (shutter is closed)
• 1130 Hugo running control loops at HAM2, possibility of shaking cleared with Chris Mueller and Cheryl
• 1145 Bubba and crew installing feedthroughs on BSC9 (WP 3644)
• 1230 Jim B heading to MX to begin work on PEM racks (seismometer front ends)
• 1245 Dave B restarting multiple SUS models as well as LSC and DAQ
• 1245 Richard inspecting equipment along Y-beam manifold and power-cycling H1SEITST (this subsequently took the SUS test stands offline for a bit).
• 1330 Travis and Betsy working in BSC1. ITMY watchdog trips.
• 1345 Patrick evaluating H0 alarm values (DUST, FMCS, Weather) and doing BURT restore to make sure correct settings were put in place following the
equipment move from the H2 building. Air handlers at EY immediately started alarming with the new “old” values---the roll-up door is open for
maintenance.
Similar to what has been done for H1 SUS PR2, H2/H1 SUS ETMY, and H2/H1 SUS ITMY, I've filled out the new(ish) infrastructure for the SEI/SUS signal exchange paths, as described in T1100617. Hence, the channels H1:SUS-MC?_M1_ISIWIT_?_DQ (sampled at 1024 Hz, stored in the frames), represent the motion of the suspension point of the mode cleaner triples in [nm], [projected / derived] from the GS-13s on board their respective HAM ISIs. (Remember, the calibration is only good [i.e. the GS-13s are only integrated] down to 10 mHz, but otherwise should be good out to the Nyquist frequency [assuming the table motion is above the GS13 noise floor]). Further, in preparation for ISC signal exchange, I've installed the 2k to 16k AI filters (see earlier entry for details) in the M3 ISCINF P and Y filter banks. All three SUS's filter files (H1SUSMC?.txt) have been copied over from the "chans" directory /opt/rtcds/lho/h1/chans/ to the userapps repo, /opt/rtcds/userapps/release/sus/h1/filterfiles/ and committed. In addition, I've taken new safe.snaps, and committed them to the appropriate location in the userapps repo, /opt/rtcds/userapps/release/sus/h1/burtfiles/mc?/h1susmc?_safe.snap
I was not sure that these got burtrestored after the move from the H2 electronics room to the MSR, so I went through and burtrestored them to Dec. 1 2012 at 00:00. The IOCs were: h0dustex, h0dustey, h0dustlab, h0dustlvea, h0fmcs, h0weatherex, h0weatherey, h0weatherms, h0weathermx and h0weathermy. If they were not burtrestored, then no alarms have been set for the FMCS, dust monitors and weather stations since Dec. 27 2012.
Restarted h1seitst front-end which was frozen.
Rick, Michael
After switching to the final RF sources for the PMC and FE EOM yesterday we needed to tune the PMC servo. After adjusting the phase through the delay box and the gain through the MEDM screen we found a good configuration with 20 11/16ths ns of delay and -4 dB of gain. This gave a UGF of about 6 kHz. However, there was some structure peaking around 80 kHz on the transfer function which gave us a low gain margin of 2 dB. We decreased the servo gain to -6 dB to increase the gain margin to 4 dB. We now have a UGF of about 4 kHz with 70 degrees of phase margin. I've attached a plot of the transfer function with a gain of -6 dB.
[Keita K., Cheryl V., Kiwamu I., Paul F., Chris M.] Tonight we began aligning the MC refl beam onto IOT2L. The first problem which we ran into is that the beam exiting the chamber is slightly low on the viewport but very low on the table enclosure hole. Although this isn't inherently a problem, we decided to take a look around to see if the alignment had changed. In particular, we checked the back reflected beam from the input viewport to HAM 1 which had moved down by ~5 mm relative to some previous wall markings. We also aligned the beam to a photodiode and checked the IMC visibility which was roughly 15 %. Cheryl informed us that drifts in the PSL have commonly caused problems for her in the past so we started our realignment by tuning the top periscope mirror and using the IMC visibility as a fiducial. This brought the visibility to ~30 %. Afterwards, we re-tuned the mode cleaner mirrors in all by less than ~200 counts each which brought the visibility back to ~80 %. We likely could have done better but decided that this was good enough to lock. As of now the IOT2L table has all of the optics on it, and refl is aligned to the PDH pd, but the WFS/camera path has not been aligned. The table still needs to be fixed in place with the screws on the legs. We are leaving the LVEA is laser hazard for the night although the shutter and viewports are closed.
Mark B. and Cheryl V. Cheryl adjusted the damping gains on MC1, MC2 and MC3 to fix the overdamping observed in recent TFs. A fresh round of MC1 damped TFs will commence shortly to confirm the effectiveness. The Measurement Status indicator will go on for the duration of the measurement and then go off automatically.
Mark B. Data taken, analysis pending: /ligo/svncommon/SusSVN/sus/trunk/HSTS/H1/MC1/SAGM1/Data/2013-01-09-1041832585_H1SUSMC1_M1_0p01to50Hz_tf.mat
Mark B. New damped TFs look rather more reasonable. However even better filters and gains based on LLO experience are being installed and there'll be another round of TFs in a few days.
Attached are plots of dust counts > .3 microns and > .5 microns in particles per cubic foot from approximately 6 PM Jan. 8 to 6 PM Jan. 9. Also attached are plots of the modes to show when they were running/acquiring data.
Rick, Michael
We turned the PSL back on today and were able to lock the PMC using the new aLIGO RF sources. We were also able to lock the ISS, but have not tried the FSS yet. We made some gain and offset settings to the PMC to optimize the loop which I will post tomorrow.
The laser came back up fine except the frontend monitoring PD inside the oscillator box (OSC_PD_AMP_DC_OUTPUT) is only reading 6.5W, while the PD on the table is reading the usual 13W. This discrepancy will have to be looked into.
We started the h1lsc0 front end computer to support the mode cleaner commissioning. I had made the IOP model previously, and we installed the LLO lsc user model. We did not install the two other models for this frontend (OMC1 and OMC2).
We took the l1lsc model and converted it to the h1lsc model by doing the following:
The last part was interesting. The PSL part in the LSC model creates H1:PSL-FSS_RFPD_DC channels, which prevented the LHO DAQ from running due to duplicate channels with the H1 PSL FSS model. Later we will remove these channels from the PSL, but for now I have renamed the LSC channels to H1:LSCPSL-FSS_RFPD_DC to allow the DAQ to run.
The DAQ was reconfigued to add the following systems
Scott & Ed, The two west side Expansion Bellows were installed today. Safety meeting cut us just too short to do the last bellows. Tomorrow we'll get the last one on, complete the torquing and protecting. We'll do one last level shot & adjust and the Chamber will be ready for at least one door, Septum blank installs followed by the second door.
Activities for today:
- John W. road inspection
- Richard M. to YBM, work on power supply for BS FE.
- Kyle R. to X-End.
- Praxair LN2 Delivery to CP1.
- Michael R, turned laser back on.
- Kiwamu went into LVEA to remove yellow protective covers at HAM02, see WP #3641.
- Laser Safety training
- LVEA was transitioned to LASER HAZARD.
Recent plot of the ENDY Pumpdown.
Also - see alog from Sept 18
https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=4229
Status as of this morning:
The Y arm is in good shape - although not cleaned up. As a result of the debris left behind the road is slippery and drivers should exercise caution. Praxair should be able to get to the YEND or YMID with no problems.
The baling crew has moved to the X arm and at 10:00 am they were ~200 meters from the End station and moving towards the corner. The road between the corner and the XMID is passable for now. If we get significant wind it may not be.
The road between the XMID and the XEND is NOT passable as the single lane that was opened has blown in again.
Photos show the condition near the XMID - the passable portion.
After the 2.6.1 upgrade, I logged in to confirm that all installed suspensions (and those not installed but with running models) are running appropriately for the condition of their respective suspension. The only thing I'm concerned about is the BS TST system, which shows that the damping loops, though not unstable, add a significant amount of noise when closed (as determined by the speedometers). I don't think this is a flaw of the upgrade, but it something into which we should look further.
Here's a detailed summary:
Summary Model Running Watchdogs OSEMs Centered OSEM OL Compensation Coil Driver BIO Damping Loops SEI/SUS Exchange OSEM Calibration Offset Calibration OpLev Calibration
------- ------------- --------- -------------- -------------------- --------------- ------------- ---------------- ---------------- ------------------ -----------------
ETMY GREAT Yes Armed Good Enough Installed COIL & State 1 M0 & R0 ON ON and functional NOT Installed Installed Installed
ITMY GOOD Yes Armed Good Enough Installed COIL & State 1 M0 & R0 ON Installed but not Receiving NOT Installed Installed Installed
TMSY GOOD Yes Armed Good Enough Installed COIL & State 1 M1 ON Receiving but not Installed NOT Installed NOT Installed N/A
QUAD TST OK Yes (No suspension attached) N/A COIL & State 1 OFF N/A NOT Installed NOT Installed N/A
BS TST BAD Yes Armed Excellent Installed COIL & State 1 M1 ADDS NOISE N/A NOT Installed NOT Installed N/A
MC1 GOOD Yes Armed Good Enough Installed COIL & State 1 M1 ON Receiving but not Installed NOT Installed NOT Installed N/A
MC2 GOOD Yes Armed Excellent Installed COIL & State 1 M1 ON Receiving but not Installed NOT Installed NOT Installed N/A
MC3 GOOD Yes Armed Excellent Installed COIL & State 1 M1 ON Receiving but not Installed NOT Installed NOT Installed N/A
PRM NOT READY Yes (No suspension attached) No infrastructure installed
PR2 GREAT Yes Armed Excellent Installed COIL & State 1 M1 ON ON and functional NOT Installed Installed N/A
PR3 NOT READY Yes (No suspension attached) No infrastructure installed
SR2 NOT READY Yes (No suspension attached) No infrastructure installed
The remaining suspensions (SR3, SRM, ITMX, ETMX, OMC) do not yet have models running.
WP3636
Today we upgraded the LHO RGC system to tag2.6.1. Yesterday we did as much preparation work as could be done without disrupting the system. At 10am today (Tuesday 8th Jan) we started the install process. We kept one frame writer up and running for as long as possible to minimize the gap in the trends for the Vacuum and FMCS slow channels.
We closely followed the wiki documents written by Keith Thorne and Alex Ivanov when they upgraded the LLO system in December. By noon we powered down all the front ends and took the DAQ down for its upgrade. After a slight problem with the data streaming from the front ends to the DAQ, by 3:20pm we had all the front ends and DAQ back online.
We did some quick tests with dataviewer and dtt to get archived data, open testpoints and ran excitations. Everyone should restart their systems and check that everything looks ok.
Tomorrow we will rebuild the SUS and ISI models for BSC1 adding back the missing IPC and DAQ channels to verify the RCG limits have been removed.
Zack Slim Ed & Scott The crew got the second Support Tube installed early morning and the Support Table was bolted down, and leveled by lunch. The Support Tubes were strapped down after lunch and the first bellows was installed by days end. SN 085 on NE. The flanges are not torqued yet but soon enough. A few more photos for the archives.
(Corey, Keita)
My mode-matching lessons from master Jedi Kawabe continue with the building of the EX Green QPD Sled. This Sled is one of two on EACH Transmission Monitor Suspension (TMS); the other is an IR QPD Sled (to be assembled next). We actually built this Sled twice. After completing it the first time, Keita noticed, "this sled looks like EY. It's supposed to be a mirror image!" It was all a learning experience. So, we ended up re-building the sled (it went much quicker since we, in essence, already had an assembly dry run).
Once the Sled was completed, we draped wipes over all optical components, wrapped the entire assembly in foil, double-bagged it, and placed the entire thing in a large plastic bin for storage under our Optics Table in the Optics Lab (the HAM1WFS Sled is also stored here).
Keita has plots and data from our mode matching measurements and will post a more thorough document about our EX Green Sled work to the DCC.
Note: The "J-Clip" Black Glass Beam Dumps on our Steering Mirrors are tough to install. There's a screw on the mount which interferes with the J-Clip and makes installing/removing these parts tough.
I have uploaded all photos for this EX Green Sled on ResourceSpace, here.
Forgot to measure distance between optical components on this Sled, so it was opened up and these measurements were made.
For measurements below, the lenses are measured on the "backface" of their Lens Holder. The Mirrors & Beam Splitters are measured from their glass "front faces". The QPDs are measured from the QPD Housing plate (D1002110). Measurements were measured with a scale & all measurements are in mm.