Y-chamber Laser Window

Plan to test and choose laser window under vacuum w/ y-chamber

Test schematic

• Caryn's slides for vacuum-measurements media:PQBmeetingVacuumWindow.pptx
• Caryn's sketch for 1137 measurement media:Screen Shot 2020-10-05 at 10.28.43 AM.png

Parts

• windows to test => ready in UITF laser room, includes Gun2 & Gun3 windows marked
• vacuum chamber w/ small bread board => ready in 1137
• vacuum pump w/ gauage => ready in 1137
• laser @ 780 nm
• 2 polarizers => there are two in UITF laser room
• QWP => ?
• photodiode or power meter =>
• 2 silver mirrors/dielectric mirrors and mirror mounts

Some pics of new Y-chamber and beam line model

Phase 1 upgrade started two weeks ago media:201002_AIPINJCAD.JPG

New y-laser chamber media:thumbnail_IMG_20201002_094527437.jpg

Caryn's prior air-measurements

• Summary logbook entry https://logbooks.jlab.org/entry/3801634

With lip = mushroom (2 out of 2 are 'good' when not under vacuum) media:IMG_20200309_175510.jpeg

Without lip = zero profile (1 out of 2 are 'good' when not under vacuum) media:IMG_20200309_151848.jpg