thomas.shaffer@LIGO.ORG - posted 17:03, Wednesday 21 May 2025 - last comment - 11:14, Thursday 22 May 2025(84528)
Replaced shutter on ISCEX
Camilla and I removed the broken Model#VS35S2T0 Serial#3179 shutter and replaced it with Model#VS14S2T0 Serial#8796. The replacement unit had a slightly smaller outer diameter so we traded some posts with beam dumps that were on the side of the table not in use to get the correct height.
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Both old and new models VS14 and VS35 use the same blade material (teflon coated SS) and have the same the max allowed energy density of <100mW/mm2 (https://www.uniblitz.com/blade-options/).
From D1800270 we expect the beam to be 14mW with a waist r=250um near the shutter, this gives an energy density of 70mW/mm2, which is within the shutter's specs.