| Work Permit | Date | Description | alog/status |
| 6464.html | 2017-01-30 12:50 | THIS AFFECTS DELTAL_EXTERNAL_DQ ONLY and DOES NOT AFFECT ANY ASTROPHYSICALLY CONSUMED DATA. Update the relative delay between DELTAL_CTRL and DELTAL_RESIDUAL paths which account for computational delays and high-frequency response approximations. This will be done by populatingthe existing CRTL_DELAY bank with a new Thiran-computed filter that will allow for non-integer clock-cycles and more precision. In addition, I'll update the control room wall figure of merit to include the latest model improvements, which had not been done in the 2017-01-03 upgrade. | 33788 |
| 6463.html | 2017-01-30 10:52 | Back-fill clogged sensing line with UHP N2, undo tubing fitting atop CP4 and utilize 1/16" wire rope and 0.080" copper wire (solid) inserted into clogged line to probe obstruction | 33779 |
| 6462.html | 2017-01-30 10:50 | Perform scheduled maintenance to scroll compressors #3, #4 @ X-MID vent/purge-air supply skid Maintenance activity will require for the compressors to run for brief periods of time Lock-out/tag-out power to skid. | 33785 |
| 6461.html | 2017-01-30 10:45 | Modify ion pump controller settings to 7.0 kV from 5.6 kV. To maintain a stable pressure in HAM6 a different controller will be used to power the ion pump for the extend of the work. Pressure of HAM6 will be monitored very close via PT110. | 33737, 33786 |
| 6460.html | 2017-01-30 09:07 | Set the addresses on the beckhoff terminals installed at the tables. | 33782 |
| 6459.html | 2017-01-30 09:06 | As part of a test for the Beckhoff system we installed remote controls of the End Station illuminators. EY is not functioning so we need to troubleshoot and potentially fix this problem. | 33781 |
| 6458.html | 2017-01-28 14:36 | Xend station PCal bi-monthly calibration. Xend will be transitioned to LASER HAZARD. | 33783 |
| 6457.html | 2017-01-26 13:43 | Remove Coil Driver BIO Connections to WD: Modify & Compile models; DeIsolate Platform; Restart model; Isolate ISI; DAQ ReStart required. | 33776, 33799 |
| 6456.html | 2017-01-25 16:11 | I will do a 15-minute live-chat with Nagoya City Science Museum at the control room in the early morning (2-ish am) of 26th and 27th. | |
| 6455.html | 2017-01-25 9:38 | Make repairs to a leak on the OSB roof above the office area, east end. | |
| Previous W.P. | |||
| 6431.html | 2017-01-12 09:16 | Update and restart the Beckhoff PLC code on h0vacmr and h0vacex to reflect the change to Gamma controllers for IP5 and IP12. Update MEDM screens. Requires DAQ restart for change of channel names. Will trip off HV at end X. | 33385, 33755, 33799 |
| 6428.html | 2017-01-10 09:19 | Replace TCSY Laser Controller D1200745. This work is related to the flow sensor alarms/glitches. The in-line flow sensor was replaced on Dec. 20, but glitches were seen after swap. See Alog 32776. Planning on doing work this or next Tues. | 33129, 33769 |
| 5855.html | 2016-04-29 13:21 | Beckhoff Rotation Stage: Install a remote rotation stage driver by Ham1 feed cables into PSL for rotation stage. This is only and alternative to trouble shooting the rotation stage. It will run on the same ethercat as the Vacuum PT170 PT180 that will be moved Tuesday. | 33774 |