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Reports until 17:09, Tuesday 16 December 2025
H1 SQZ
eric.oelker@LIGO.ORG - posted 17:09, Tuesday 16 December 2025 (88564)
VOPO Alignment progress

[Daniel D, Kar Meng, Eric]

We made a bit of progress witth the new VOPO install.  The cavity is now dogged down with all cables installed.  We started to align the green path.  Horizontal alignment looked pretty good after the swap, but the vertical alignment was actually a little off.  We suspect that the cavity axis is tilted a bit between the old and new cavities.  Its also possible that the green fiber mount just got bumped when we were swapping out the cable in the bracket behind the VIP yesterday.

After walking the vertical alignment a bit we are now seeing green flashes and are near the center of the green refl iris on SQZT7.  We plan to finish aligning once we set up the pzt driver and scope tomorrow.  The CLF alignment looks quite off at the moment.  We'll align the clf to the transmitted green beam once the former is optimized.  

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