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Message ID: 278     Entry time: Thu Jan 26 17:06:59 2017
Author: Gabriele 
Type: General 
Category: Daily Progress 
Subject: Four fold measurement system installation 

Today I installed the four GeNS systems into the chamber, connected the ESD to the HV feedthrough and put the periscopes in place.

Note 1: the lens holders have been remachined to solve a dimension problem, by removing completely the two lips against which the lens was supposed to be sitting. To recover a reasonable centering of the lens, I added two small shims inside each holder. They are made out of wrapped aluminum foil.

Note 2: I added some small shims (again made of wrapped aluminum foil) below the base plate, to make it as close to horizontal as possible

Finally, I managed to align the optical level beam for the QPD1, using as usual a small container with water to get the horizontal reference.

Some pictures below.

Attachment 3: 2017-01-26_14.04.06.jpg  1.765 MB  | Hide | Hide all
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