aLIGO LHO Logbook

H1 CDS

Link

david.barker@LIGO.ORG - posted 08:52, Monday 01 December 2025 - last comment - 15:52, Monday 01 December 2025(88274)

h1susey down for LIGO-DAC upgrade

WP12901 LIGO-DAC upgrade

Daniel, Fil, Marc, Jonathan, Richard, EJ, Ryan S, TJ, Jeff, Oli, Dave:

h1susey was fenced and power down at 08:25 in preparation for its upgrade to LIGO-DACs. SWWD was bypassed on

Fil is at EY upgrading the AI chassis to accept the new SCSI links from the DACs.

Comments related to this report

filiberto.clara@LIGO.ORG - 14:31, Monday 01 December 2025 (88284)

Link

The following AI Chassis were updated:

AI Chassis D1000305 S1108084 (SUSEY-C1, slot U32)
AI Chassis D1000305 S1108070 (SUSEY-C1, slot U31)
AI Chassis D1500177 S1500300 (SUSEY-C1, slot U26)

The rear panel and DAC AI Interface Board D1000551 were removed. A new D2400308 LIGO DAC Anti Image Chassis Rear Panel and LIGO DAC AI Interface D2500097 were installed.

jeffrey.kissel@LIGO.ORG - 15:52, Monday 01 December 2025 (88286)

Link

"Yes, and..." to Fil's inventory and comments about what's changed within them --

AI Chassis D1000305 S1108084 (SUSEY-C1, slot U32) has now been transformed into a D2500353 AI chassis assembly
AI Chassis D1000305 S1108070 (SUSEY-C1, slot U31) has now been transformed into a D2500353 AI chassis assembly
AI Chassis D1500177 S1500300 (SUSEY-C1, slot U26) has now been transformed into a D2500400 AI chassis assembly