Reports until 16:35, Tuesday 28 April 2026
H1 General
anthony.sanchez@LIGO.ORG - posted 16:35, Tuesday 28 April 2026 (90032)
Maintenance Tuesday Report

TITLE: 04/28 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY:

Test T634314 @ 16:00:30 UTC

Firepump1 is on 16:30:23
FirePump2 on 16:31:20 UTC
Eric confirms that Firepumps are done being used at 16:35 UTC

Vacuum Alarm for PT120B pressure torr started alarming @ 16:42 UTC, likely due to Fil pulling cables.

Dust monitors for LVEA 10 (Which I beleive is the dust mon in the BSC2 area.)
 

Test Frame Writer2 was restarted without incident. 


HEPI Pump pressure diag main. Jim says he'd like this to become a Diag Main flag that gets raised when the following channels are more that 5% off from each other.:  
H1:HPI-PUMP_L0_PS1_PRESS1
H1:HPI-PUMP_L0_PS2_PRESS1
H1:HPI-PUMP_L0_PS3_PRESS1
H1:HPI-PUMP_L0_PS4_PRESS1

MC2 and PR2 were taken to safe while betsy and Travis work in HAM3.

DC0 & FW restarts for new SPI front end models  at 22:13 UTC.

LOG:

 

Start Time System Name Location Lazer_Haz Task Time End
14:40 FAC Kim LVEA N Technical Cleaning & Supplies. 15:56
14:54 FAC Tyler & Betsy LVEA N talking with Kim 14:59
15:19 SUS Rahul HAM3 LVEA Installing baffles. 19:29
15:20 FAC Randy LVEA N Helping Betsy 15:39
15:31 FAC Chris LVEA HAM7 N Checking traps. 15:55
15:38 SUS Mitchell LVEA HAM3 N Helping Rahul with Baffles 19:25
15:41 PEM Ryan LVEA N HAM3 Dust monitor 15:48
15:42 Safety Richard & Gerardo LVEA N Talking to Betsy, Gerardo still in. 16:24
15:53 FAC Chris MY,EY,MX,EX,FCES N Famis checks. 16:42
16:04 EE Fil LVEA N Pulling cables to the Test stand 19:19
16:10 Tour Jeff & Adrian LVEA n Touring the LVEA 16:51
16:24 Cheta Camilla Optics Lab N Checking for parts 16:48
16:25 VAC Gerardo LVEA N Moving the bang Blocks. 17:38
16:26 FAC Randy LVEA N Chatting with Betsy 17:16
16:27 FAC Tyler LVEA Highbay N Moving the MeatLocker. 19:12
16:32 FAC Kim LVEA N Techincal cleaning & Re-Suppling 17:26
16:46 VAC Travis LVEA N Checking on HAM3 Feed throughs. 17:30
16:48 VAC Jordan LVEA N Checking CP1 RGA tree 17:18
17:30 VAC Travis MX N Measurements on Cryopump 17:54
18:08 EPO Cassidy & Youth Tour Over pass N Leading a tour for the Youth. 19:08
18:09 Controls Jeff, Tom, Oli LVEA n Looking for Fil 18:49
18:14 Bets Betsy LVEA N Counting Cereal numbers. 19:20
18:21 SEI Jim LVEA IY N Reconnecting a cable that was accidentally disconnected. 19:02
18:42 EPO Maggie Over pass N Leading a Youth tour. 19:27
18:52 SPI Jeff LVEA HAM6 n 5 minute scavenger hunt for parts. 18:54
19:01 IAS Jason & Ryan LVEA N Faroing 19:01
19:44 SEI Jim Mech Mezz N Recovering the HEPI Pumps. 20:15
20:09 SEI Jim LVEA N Revalving BSC2 HEPI 21:34
20:18 IAS Jason & Ryan C LVEA N Faro Surveying 23:48
20:22 BHSS Keita & Elenna Optics Lab n working on Manta ray. 22:09
20:23 FAC Randy LVEA mega Cleanroom N adding unistrut! 21:24
20:59 VAC Travis & Betsy LVEA HAM3 N feedThrough work in HAM3 22:59
21:11 EE Marc CER N Installing SUS chassis 21:20
21:28 IAS Sheila & Adrian LVEA n Faro Surveying 22:30
23:06 VAC Gerado LVEA West bay N Poking the "Super Sucker 500" 23:26
23:21 VAC Jordan LVEA WestBay N to help Gerardo with uh.... device mentioned 23:26
Images attached to this report