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Reports until 14:22, Monday 01 December 2025
H1 SUS (CDS, ISC)
jeffrey.kissel@LIGO.ORG - posted 14:22, Monday 01 December 2025 (88283)
SVN up'd ESD_LINEARIZATION_WITH_CHARGE Library Part; Inconsequential Change
J. Kissel, D. Barker

As an inadvertent result of us using the new "rev lock" RCG feature during the build of front-end model h1susetmy, we discovered that there was a newer revision of the sub-sub library part used within the QUAD_MASTER library part -- 
    /opt/rtcds/userapps/release/sus/common/models/
        ESD_LINEARIZATION_WITH_CHARGE_MASTER.mdl : r16336 --> r30316
where the latter text shows the userapps svn repo version that the h1susetmy model was last compiled with, and what it will be compiled with if we use latest rev of the model (r34028, see LHO:88282).

The ESD_LINEARIZATION_WITH_CHARGE_MASTER.mdl is *actually* a library, i.e. it contains a library of library parts that can be used for linearization.
One is the ESD_LIN_CHARGE_MASTER, and the other is ESD_LINE_CHARGE_GENERIC_MASTER.

We're 100.0% confident that the h1susetmy, which uses QUAD_MASTER, uses the ESD_LIN_CHARGE_MASTER block, that's poorly commissioned and has its settings configured to not use it.
We're 98.5% that r16336 --> r30316 update to the library is the creation and commissioning of the other ESD_LINE_CHARGE_GENERIC_MASTER block, given Dec 2024 LLO aLOGs like LHO:74555 and 74771. The 1.5% lack of confidence is only that it's challenging to follow LLO's QUAD front-end model's references to libraries.

Anyways -- this is just to say explicitly that we're going forward with using this r30316 version of the library, but it won't change any function or form of the h1susetmy model.
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