Reports until 15:20, Thursday 26 September 2024
H1 AOS
robert.schofield@LIGO.ORG - posted 15:20, Thursday 26 September 2024 (80319)
PR2 scraper baffle reflection at 19mW, was 17mW

I measured the power of the beam comming out of the HAM3 illuminator viewport and found it to be 19mW, as compared to 17mW measured in this alog 78878. The beam is a reflection off of the scraper baffle of the part of the PR2 to PR3 beam that is clipped by the aperture of the scraper baffle. We had minimized it from 47mW to 17mW for the referenced alog, and wanted to see if it was clipping more - not much.