Reports until 16:13, Tuesday 28 March 2017
LHO General
vernon.sandberg@LIGO.ORG - posted 16:13, Tuesday 28 March 2017 (35158)
Work Permit Summary for 2017 March 28
Work Permit Date Description alog/status
6546.html 03/27/17 04:05 PM Create and test a Guardian node that will turn on and adjust a set of Cal lines for later analysis. 35153
6545.html 03/27/17 01:43 PM Inject blip-like glitches to test performance of NOISEMON channels 35116
6544.html 03/27/17 01:20 PM We will add a new signal path in h1omc and h1calcs models in order to implement the DCPD cross correlation scheme (whose ECR, E1700107, has been approved). Because this implementation is independent of the main interferometer control signals, we don't expect any impact on locking or sensitivity. DAQ restart is required. 35156, 35139, 35115
6543.html 03/27/17 09:56 AM Upgrade LHO CDS login servers cdsssh, cdslogin and opslogin to Debian8. Needed because current OS is near end-of-support. 35119
6542.html 03/27/17 09:03 AM Repair underground water leak on feed line to VPW. This will require digging up asphalt and digging down to the PVC line.  
6541.html 03/27/17 08:40 AM Perform scheduled maintenance to scroll compressors at Y-MID vent/purge-air supply skid. Maintenance activity will require for the compressors to run for brief periods of time to check compression. Lock-out/tag-out power to skid as required. 35149
6540.html 03/23/17 12:57 PM Reduce crontab tasks on h1hpipumptrcl[l0,EX] to be that used on EY unit. Check local clocks are correct. 35141
6539.html 03/23/17 11:36 AM We would like to "borrow" a HWS PCIe card from one of the end stations (whichever one we can get to on Tuesday) and put it on the spared HWS machine at the corner station so we can get HWSY running. Transfer of PCIe card completed.
6538.html 03/23/17 11:03 AM Remove the INSTAIR alarms for the MX compressor from the cell phone text alarm system.  
6537.html 03/23/17 07:04 AM Swap out the harmonic frequency generator with a spare to see if this is the cause of glitches in the RF 45. Swap complete, now monitor for glitches.
       
Updates to previous Work Permits      
6527.html 03/19/17 09:36 PM Access to pcal system and camera to take pictures and possibly move the pcal beams 34980, 35137