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Reports until 13:11, Monday 09 October 2017
H1 SEI (DetChar, ISC, SQZ, SUS)
jeffrey.kissel@LIGO.ORG - posted 13:11, Monday 09 October 2017 (38943)
New ISI CART2EUL Projection Matrices for SQZ SUS, Connected New and Pre-Existing L Outputs to OAF for Cavity Basis Projection
J. Kissel, D. Barker

Now that we've moved the suspension point projections into the ISIs (e.g. LHO aLOG 26363), it's much easier to add new interesting suspension point projections to each platform. I've added new projection infrastructure to ISI HAM2, ISI HAM5, and ISI HAM6 to include
- ISI HAM2: Connecting the pre-existing IM1, IM2, IM3, and IM4 projections' longitudinal output via dolphin IPC destined to be picked up by h1oaf.mdl. 
- ISI HAM5: Creating new SUSPOINT projections for the OFI and ZM2 with associated new senders via dolphin IPC to the h1oaf.mdl. The new projections are stored in the frames at 4096 Hz.
- ISI HAM6: Creating new SUSPOINT projections for VOPO and ZM1 with associated new dolphin IPC senders to the h1oaf. The new projections are stored in the frames at 4096 Hz. Also, creating new dolphin IPC sensors for the pre-existing longitudinal output for the OMC, and OM1, OM2, and OM3.
- OAF: In OAF, all corresponding new and newly added longitudinal suspension point projections were added as inputs to the giant cavity basis matrix, with new output elements,
    - "IOL" for "Input Optics Length," imagined* to be the coherent sum of IMs L, to recreate path length displacement between the IMC output and PRM IFO input
    - "ASL" for "Anti-Symmetric Length," imagined* to be the coherent sum of the OFI, the OMs, and the OMC, to re-create path-length displacement between the SRM IFO output and the OMC
    - "SQZL" for "SQueeZe Length," imagined* to be the coherent sum of the VOPO and the ZMs to recreate the squeezer path length displacement between the VOPO and the OFI
*I say "imagined to be" because that's what I naively think should go into the coherent sum to recreate the path length, but the matrix has been setup that it can be the coherent sum of any optic, if we so chose later.

Attached are screenshots of the relevant parts in each model that were affected by this change. 

We'll make the modifications to each HAM ISI's custom SUSPOINT screen in due time. We don't yet have projections for any of these new suspensions (or from the OMs), but I'll eventually work with the systems group to get something good enough.

Finally, of note, I've *removed* the last of the suspension point projection displays from the OM ALL and RM ALL MEDM screens, as has been done some moons ago for all other SUSs.
Images attached to this report
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