Reports until 12:40, Wednesday 15 October 2025
X1 SEI (CSWG, ISC, SEI)
jeffrey.kissel@LIGO.ORG - posted 12:40, Wednesday 15 October 2025 (87497)
SPI Optomechanics: All 4x IXM Optics Mounts have been converted to Picomotor Actuated Mounts
J. Kissel, M. Pirello

There are four pico-motor actuated mirrors in the HAM2-3 ISI SPI Pathfinder (or, generically HAM2 = ISI"J" and HAM3= ISI"K"), M_M1, M_C1, M_B4, and M_M2 (see page 3 of D2400108). Those optics have the following mounts:
    - M_M1 = IXM100.C2L-VC LIGO = 1" optic mount, left-handed.
    - M_C1 = IXM200.C2-VC LIGO = 2" optic mount, right-handed.
    - M_B4 = IXM100.C2-VC LIGO = 1" optic mount, right-handed.
    - M_M2 = IXM100.C2-VC LIGO = 1" optic mount, right-handed.

To-date the assembly procedure has been scattered into incomplete pieces, including separated mechanical assembly (D1100362 and E2500163-v1) and electrical assembly (D1400279). 

As such, I've created an all-inclusive assembly procedure in E2500163-v2, and the DCC file-card now perma-links to a google photo album containing many more photos than even what's in the procedure.

So, now I can write this aLOG, which "just" says -- we've completed the assembly for SPI's four pico-actuated mirrors, per E2500163-v2 assembly instructions.

It's always challenging to get a photo highlight, so I'll attach the best one I got mid assembly (i.e. the picomotors weren't yet connectorized, nor were the ECR E1400327 range-limiting shafter collars installed). 

The 2nd, 3rd, and 4th attachment show three photos I got of the completed M_M1 (IXM100.C2L, 1" left-handed) mount.
Images attached to this report