| Work Permit | Date | Description | alog/status |
| 6560.html | 04/04/17 08:58 AM | Attempt to align HWSY periscopes (if misaligned). The most recent HWSY data suggested that there might be some misalignment on the table + bad SLED. Will be taking the Hartmann plate off to live-stream the camera and check the beam profile. Need: green light for alignment, SR3, and ITMY aligned | |
| 6559.html | 04/04/17 08:13 AM | Look at PEM AA chassis. Reported bad channels by PEM group. | 35316 |
| 6558.html | 04/03/17 01:58 PM | Grab regular, bi-weekly CAL measurement at some non-maintenance day this week while LLO is down. Measurement takes ~40 minutes at most. | |
| 6557.html | 04/03/17 01:56 PM | Add a state "NLN_CAL_MEAS" to ISC_LOCK guardian which preps the detector (already in nominal low noise, NLN) for biweekly regular calibration measurement suites (so far, just involves turning off calibration lines). Prep code on Monday (Today 3/4), Load and Test tomorrow (Tuesday, 4/4). | 35295 |
| 6556.html | 04/03/17 01:01 PM | Temporary swap the HWS camera fiber cable so we can collect data from ITMY. To see some gradient change we need either one power-up or one lockless during the time of data collecting. Will revert the connection back to ITMX once this is done. | 35294 |
| 6555.html | 04/03/17 10:37 AM | Swap the optical lever laser with one that has been stabilized in the lab. This is to cure the ongoing glitching issues this oplev has been experiencing. No viewports will be exposed during this work. The laser will need ~2 hours to come to thermal equilibrium once installation is complete. | 35309 |
| 6554.html | 04/03/17 10:36 AM | Move several elements of the NGN array in Bier Garten in prep for upcoming ITMX vent. | |
| 6553.html | 04/03/17 10:15 AM | Soft close GV 5 & 7 to protect beam tubes during pcal camera housing installation, requiring access to viewport. | 35315 |
| 6552.html | 04/03/17 10:03 AM | Recenter BRSY suspended proof mass to return probe mirror autocollimator image on CCD. Requires turning off ISI ETMY sensor correction. | 35313 |
| 6551.html | 04/03/17 09:57 AM | Move Compact BRS clear of ITMX chamber in prep for Short Vent. Will leave cBRS in new location for the duration of O2. | |
| 6550.html | 04/01/17 01:13 PM | Install newly modified ITM camera housing, install telescope and camera, take photos locally. Will require VAC group supervision/assistance since viewport protection will be removed during install. Taking photos locally will involve plugging the camera into a laptop and adjusting settings and aperture masks while in the LVEA. Total duration of install/photography may require more than the typical 8am-noon maintenance period. | 35326, 35327 |
| 6549.html | 03/30/17 04:23 PM | open IOT2R and move beam blocks to allow the beam to travel to the LVEA wall and then the positions marked. LVEA will need to be laser hazard. IMC will need to be locked. IM1-4 will need to be aligned. There will be limited access past IOT2R while the beam is exposed. I'm on owl shift, so would like to do this at the beginning of Maintenance. | Deferred to next week. |
| 6548.html | 03/30/17 03:45 PM | Remove Mid-Y Compressed Air alarms from the cell phone alarm system. | |
| 6547.html | 03/29/17 10:08 AM | ECR1700111 to add 7 slow channels to DAQ broadcaster | 35321 |