Replaced NC solenoid valve on left tower of X-mid instrument air drying unit. Building pressure maintained by use of portable compressor (4cfm oiless)
One of the project controls team created a tribute to our assembly techs and the great work they have been doing. Please note, this was done on her personal time. Everything is edible except for the bolt and the tool.
Dave and Jonathan,
we repurposed the lhocds.ligo-wa.caltech.edu IP name from the old iligo system to the new aligo system. Users of the old servers will have to substitute "blue" for "lhocds" in their URLs to get to the old wiki, web pages.
We also ligo.org converted the new aligo CDS web/wiki server. Anyone with a ligo.org account can view the web pages and post wiki entries. In the future, when the wiki contains sensitive reboot instructions we may further restrict the number of subscribers.
King Soft water Unifirst Construction started on H2 PSL enclosure Field trip Praxair delivery to CP2 and CP5 Camera can removed from HAM4 squeezing table Preparation for moving BSC6 Finished unloading clean room parts for end stations
Noticed that the instrument air at the X-mid was wet -> Investigation showed a switching failure between the drying towers. I reset the electronics and observed a few cycles of tower switching. Also observed that the regeneration flow valve was set for near 0 psi -> adjusted for ~50 psi. -> checked a few hours later and working normally. Why was valve setting so far off nominal???
Construction began on the H2 PSL laser enclosure today. Contractors started laying the framing down, bolting the support structures to the floor.
Yesterday, BSC6 South door was pulled, after a couple rounds of chamber cleaning. We installed the Support Tube 'Pillows' which fit under the Support Tubes in the chamber nozzles. Once in place, the Scissors tables are used to lower the Support Tubes onto the pillows. To lock them down, A cable goes around the Support Tube and shackles to a Bracket bolted to a chamber interior flange. See photo, this is not tensioned up yet and there will be one on each corner. Once the Exterior support structure is removed, further positioning constraint and bellows protection will be installed. Hugh for Terry & Christina; Jim, Randy, Scott & Bubba
Ran well pump today Programed North crane so lights will stay on
The H2 PSL table was installed into its aLIGO position today. It was wrapped up in plastic to seal it from any dust, and we will add a protective layer of lacquered wood to cover the table during construction of the laser room.
Finished cleaning H2 PSL table Cleaning at end Y Moved test squeezer table from H1 PSL area to next to HAM 4 and HAM 5. Drilling for anchor bolts behind HAM 12
The H2 PSL table is now clean. Every hole was brushed with a gun bore brush, and then cleaned by using the dust-off cans of compressed air to shoot out any particles while a HEPA vac was over it to collect them. This was made much more difficult by the ugly rust stain that was sitting on the table and required lots of attention. A big thanks to Terry, Christina, and Gerardo Jr for helping with all this!
The springs have been pulled down and the barrel nuts inserted, so the optics table is ready to be installed on the test stand.
Position sensors 30 & 36 were removed after it was found they weren't working correctly.
Throughout the day: cleaning at Mid-Y completed by 12:00 Jodi and crew out by HAM12 Michael Rodruck and Gerardo Jr. cleaning on H2 PSL table 9:30 – M. Landry to EY to lock down GS-13s so initial alignment of BSC can begin 1:30 – Kyle out to X-End to replace a mechanical level gauge for CP8.
I discovered while attempting to replace CP8's magnehelic diff. pressure (mechanical level gauge) gauge that the recent reboot/overpressure episodes had caused a previously unnoticed soft rubber plug to pop out of the back of the gauge. I reinstalled this plug and now the gauge is working normally and won't requre replacement. Obviously, this device is designed to pop out and prevent damage to the measuring diaphram in the event of overpressure.
Delivery from Diamond freight Drilling core holes behind HAM12 Cutting off of bolts from degrouting areas PSL table cleaning Dave attempted to restart h1awg0 Terry, Christina, Gerardo Jr cleaned at mid Y
LDAS have completed their work, so I restarted fb0w writing frames.
The data gap on nds0 is from 12:28 Apr 5 to 15:16 Apr 6. For archived data in this period please use nds2.
The historical quad and BS data was accessible on the workstation at /export/controls/data, but it was physically on the front end, at /home/controls/data . So I first renamed it to olddata20110406, and then copied it across to /ligo/svncommon/ (i.e., right next to the checkout of the SUS SVN at /ligo/svncommon/SusSVN ). Over the next few days I'll do a bit of tidyup on the files, then move them into the SVN and formally add/commit them. Please don't add any new data to either copy of olddata20110406. Rather, put new data directly in the SVN using the links I created: ~/X1QUAD -> /ligo/svncommon/SusSVN/sus/trunk/QUAD/X1 ~/X1BSFM -> /ligo/svncommon/SusSVN/sus/trunk/BSFM/X1 Below those entry points, the directories are for quad number (e.g., QUAD01), build number (e.g., BUILD01), "sensor-actuator group" (e.g., SAGM0). So an actual data file might live at /ligo/svncommon/SusSVN/sus/trunk/QUAD/X1/QUAD01/BUILD01/SAGM0/Data/
- Deliveries from UniFirst, Diamond Freight (for Hugh), and Praxair in the morning. - DaveB and KyleR worked on EX's vacuum EPICS system. - RichardM worked on waking h1awg from its winter hibernation. This led him to working on the GPS receivers as well. - MichaelR, TerryS, ChristinaC, and Jr. were cleaning the H2 PSL table, hole-by-hole. Efforts are now focusing on the holes in the rusted portion of the table. - Apollo folks working around HAM7 area in preparation of linking its new neighboring HAM(8?). - Winds very high today as cold front returns...snow expected Wednesday.
