ryan.short@LIGO.ORG - posted 16:55, Tuesday 21 April 2026 (89966)
Ops Afternoon Shift Summary
TITLE: 04/21 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY: Busy day after taking over from Corey. End-of-day optic alignment trends are attached; only things of note are that MC2 is now MISaligned after the Guardian restart today.
- Work on BSC2 continued with HEPI actuators and walking plates
- TCSX water lines on the optical table started to be replaced
- Guardian computer upgraded to Debian 13
- When nodes came back online, this turned BS OpLev damping on, so the suspension was erroneously moving a bit for the afternoon (outputs turned off @ 23:18 to fix)
- Laser interlock chassis at EY was worked on, see alog89965 for some details
- This brought the site interlock down for a while; I've recovered the PSL but other lasers remain off until they're needed again
- Turbopump on CP1 installed, see alog89967
LOG:
| Start Time | System | Name | Location | Lazer_Haz | Task | Time End |
|---|---|---|---|---|---|---|
| 17:38 | CAL | Tony, Marc | PCal Lab | - | Looking for parts | 17:52 |
| 17:38 | TCS | TJ | LVEA | - | TCSX expansion joint | 18:05 |
| 18:10 | IAS | Ryan C | LVEA | - | FARO in West bay | 19:11 |
| 18:20 | IAS | Jason | LVEA | - | FARO in West bay | 19:11 |
| 18:28 | CAL | Tony, Fil, Marc | EY | - | PCal chassis troubleshooting | 18:51 |
| 18:35 | FAC | Randy | LVEA | - | Pictures in mega cleanroom | 18:43 |
| 19:26 | FAC | Randy | LVEA | - | Prep for BSC2 platform craning | 19:47 |
| 19:29 | PEM | Ryan C | CER | - | Testing dust monitor | 19:39 |
| 19:52 | EE | Fil, Marc | EY | - | PCal chassis/interlock work | 23:11 |
| 20:03 | SEI | Jim, Randy | LVEA | - | Craning BSC2 walking plates | 21:30 |
| 20:05 | PEM | Ryan C | CER | - | Swapping dust monitors | 20:12 |
| 20:41 | IAS | Jason, Ryan C | LVEA | - | FARO in West bay | 22:41 |
| 20:43 | TCS | TJ | LVEA | - | Prep for TCSX table line swaps | 20:58 |
| 20:58 | CDS | Dave | EY | - | Chassis power supply swap | 22:08 |
| 21:04 | VAC | Travis, Jordan | LVEA | - | Craning BSC2 walking plates | 21:23 |
| 21:21 | CDS | Erik | CR | - | Powering off h1iopiscey | 21:21 |
| 21:59 | TCS | TJ | LVEA | - | TCSX table water line replacements | 23:44 |
| 22:09 | SEI | Jim, Mitch | LVEA | - | BSC2 HEPI actuators | 23:26 |
| 22:14 | TCS | Camilla | LVEA | - | TCSX table water line replacements | 23:51 |
| 22:35 | CDS | Dave | EX | - | Checking power supplies | 23:08 |
| 22:51 | IAS | Jason, Ryan C | FCES | - | Grabbing equipment | 23:24 |
| 23:11 | EE | Fil, Marc | LVEA/OptLab | - | Inventory | 00:11 |
| 23:32 | PEM | Ryan C | CER | - | Dropping off dust monitors | 23:33 |
| 23:34 | VAC | Jordan | LVEA | - | Pictures of CP1 | 23:40 |
| 23:42 | CAL | Tony | EY | - | Bringing PCal back up | 01:42 |
Images attached to this report
