Displaying report 1-1 of 1.
Reports until 08:45, Tuesday 13 January 2026
H1 SUS (CDS, SEI)
jeffrey.kissel@LIGO.ORG - posted 08:45, Tuesday 13 January 2026 - last comment - 16:20, Tuesday 13 January 2026(88745)
H1SUSB123 and H1SUSH34 SUS and SEI Systems prepped in SAFE for Conversion to SUSB13 and SUSH34
J. Kissel
ECR E2500296, E2400409
WP 12962

D2300401 (for susb13) and D2300383 (for susb2h34)

We begin the major upgrade of the H1SUSB123 and H1SUSH34 SUS and SEI Systems converting them to SUSB13 and SUSH34 a la G2301306 today. We're focusing on upgrading the DACs in the IO chassis () and all the downstream surrounding impact of that  analog electronics This will take down the following computers, and they will be resurrected with new names as follows:
    FORMER NAME           FORMER SUS              NEW NAME           NEW SUS
    h1susb123             ITMX, ITMY, BS          h1susb13           ITMX, ITMY
    h1sush34              MC2, PR2, SR2           h1susb2h34         BS, MC2, PR2, SR2, LO1, LO2
    h1susauxb123          ITMX, ITMY, BS          h1susauxb13        ITMX, ITMY
    h1susauxh34           MC2, PR2, SR2           h1susauxb2h34      BS, MC2, PR2, SR2, LO1, LO2

As such, I've 
    - brought the ITMX, ITMY, BS, HAM3, and HAM4 SEI systems to ISI_DAMPED_HEPI_OFFLINE (so we don't risk any "hard" trips of HEPI during all this).
    - brought all impacted SUS gaurdians to AUTO mode, then to the SAFE state
    - Increased the bypass time on all impacted software watchdogs to bypass time to a large number (90000000 secs), and hit BYPASS
Comments related to this report
marc.pirello@LIGO.ORG - 16:20, Tuesday 13 January 2026 (88752)

Updated timing cards on newly named SUSB13, SUSB13 AUX, SUSB2H34, SUSB2H34 AUX, formerly known as SUSB123, SUSB123 AUX, SUSH34 and SUSH34 AUX.

Timing FPGA Version 1589

Displaying report 1-1 of 1.