Jennie, Jim, Jenne

Sheila asked me to check the alignment of the SRM as it is with HAM5 ISI and HEPI lcoked vs. what it was when we were locking before the OFI damage.

I chose a state after DRMI_ASC_OFFLOADED so the SRM would be aligned (state 120 in ISC_LOCK which is CHECK_AS_SHUTTERS).

Between the first cursor (10th July) and now, SRM moved up by 67.7 uradians on the yaw slider, 70605 nradians on the HAM5 ISI RZ CPS, 900 nradians on the HAM5 HEPI RZ IPS. This resulted in an overall alignment change of +6.18 uradians on the osems.

This means that to move the SRM into this position again we would have to move up by 139.3 (67.7 + 70605e-3 + 900e-3) uradians on the sliders in yaw.

I checked with Jim about the channels to use on HEPI and ISI on HAM5 and we think the SRM yaw should have the same sign as the HEPI IPS and the ISI CPS as they both increased as the osem yaw values increased over this period.

Edit: Jenne pointed out since the osems are relative to the table, the change on the yaw sliders to get us back to our old SRM alignment should be

(6.18 + 70605e-3 + 900e-3) = + 77.7 uradians in yaw

So you should undo this with -77.7 uradians in yaw on sliders.