| Work Permit |
Date |
Description |
alog/status |
|
|
4/18/2017 9:53 |
Remove the HAM4 South door illuminator from port and look into chamber to view HWS optics. There is a clear guillotine cover in place which will not be removed. If it needs to be removed for any reason (to aid viewing) I will ask Gerardo for assistance. No laser beams are traced to be exiting this port. |
35655 |
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4/17/2017 15:52 |
Duplicate of WP 6586 |
35624 |
| 6586.html |
4/17/2017 15:52 |
Remove and replace LN2 level gauge LI105A at storage tank 8514380 at the X-end*Will result in CDS level indication to read near zero (RED) for this tank while replacement is in progress |
35624 |
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4/17/2017 15:46 |
Run cables from BRS (Beam Rotation Sensor) ion pump controller to vacuum racks for both end stations. Ion pump controllers will be elevated off the ground. |
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4/17/2017 14:37 |
Run new cabling for temperature sensors from the mechanical room into the LVEA. Runs in the LVEA are to the following chambers: HAM2, HAM3, HAM4, HAM5, BSC1, and BSC3. Work will require climbing on some of the chambers. This work is part of the HVAC upgrade being done by Apollo. |
35643 |
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4/17/2017 13:04 |
Revert calibration code running on the DMT from gstlal-calibration-1.1.5 to gstlal-calibration-1.1.4. This will change the DMT calibration code to the older code, while gstlal-calibration-1.1.6 undergoes further testing. 1. This will removed the bug in gstlal-calibration-1.1.5 which causes the calibration to be marked as NOT OK persistently after data zeros or data dropout occur, e.g., as seen here: https://ldas-jobs.ligo-wa.caltech.edu/~detchar/summary/day/20170416/plots/H1-MULTI_D80927_SEGMENTS-1176336018-86400.png 2. This will re-introduce the bug in gstlal-calibration-1.1.4 which can cause the calibration to be incorrectly marked OK for -/+ 3 s after a data dropout. This problem is rare and can be vetoed later. The plan is to continue to test gstlal-calibration-1.1.6 (or later as needed) to verify it fixes both bugs listed above (and doesn't introduce new bugs) A new WP will be issued then. And C01 will be run with the new code over times since March 10, to fix the times affected by bugs in online running since then. |
35647, 35647, 35612, 35619 |
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4/17/2017 12:25 |
Repeat tests described in LLO alog 28979 Should take less than 1 hour |
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| 6581.html |
4/17/2017 12:13 |
Replace razor dump on ISCT1 with black glass diamond, to reduce upconversion and DARM noise during high ground motion times. |
35636 |
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4/17/2017 11:37 |
Remove view port cover and setup/use laser vibrometer to investigate baffles in input arm. |
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4/17/2017 10:50 |
Run QDP80 roughing pump in corner station mech. room, along with Kobelco (needed for purge air in roughing line during shut down). Also spin up y-beam manifold turbo pump. Swap out battery packs on X&Y beam manifold TPs. |
35625 |
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4/17/2017 10:00 |
Regular PSL maintenance: Increase the HPO pump diode currents to return HPO output power to its start-of-O2 level. HPO power is down due to natural decay of the HPO pump diodes. Tweak beam alignment into PSL PMC to return to start-of-O2 PMC transmitted power. PMC transmitted power is down due to HPO pump diode decay and alignment shift into the PMC. This work requires the PSL ISS to be OFF, so the IFO will need to be unlocked. All work will be preformed from the control room, no PSL incursion is necessary. |
35611 |
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4/14/2017 11:39 |
Remove the channels that have already been migrated to BACNet during the FMCS upgrade from the existing FMCS IOC where they are now invalid. Start and run a separate BACNet IOC for these channels and additional ones created during the upgrade. Continue this process as the upgrade continues. |
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4/14/2017 8:53 |
Change the power settings so the screen goes to sleep after 0.5 hour of inactivity. |
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4/13/2017 23:26 |
Perform bi-monthly PCal calibration at End X. Will require aligned ETMx and End X VEA to be laser hazard. |
35639 |
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4/13/2017 10:10 |
Test EPICS IOC for FMCS BacNet channels. Will create a number of EPICS channels on the CDS network. |
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| Previous W.P. |
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| 6572.html |
04/11/17 12:41 PM |
Install SRC detuning time dependent tracking. Includes update to CAL-CS front-end model, GDS gst-lal calibration pipeline code, updates to the science frame channel list which need to be included in all down stream channel lists so that the GDS pipeline can use those channels. Requires DAQ restart, and modification to separate DMT Frame Broadcaster channel list. Corresponds to gstlal release 1.1.5. |
35462, 35474, 35478, 35637 |
| 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, 35615 |