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Entry  Wed Oct 20 11:16:21 2021, Anchal, Summary, PEM, Particle counter setup near BS Chamber PXL_20211020_183728734.jpg
    Reply  Thu Oct 21 11:41:31 2021, Anchal, Summary, PEM, Particle counter setup near BS Chamber ParticleCountData20211021.pdf
       Reply  Thu Oct 21 15:22:35 2021, rana, Summary, PEM, Particle counter setup near BS Chamber 
    Reply  Thu Oct 21 15:24:35 2021, rana, Summary, PEM, Particle counter setup near BS Chamber 
       Reply  Fri Oct 22 17:35:08 2021, Ian MacMillan, Summary, PEM, Particle counter setup near BS Chamber 
Message ID: 16422     Entry time: Thu Oct 21 15:24:35 2021     In reply to: 16416     Reply to this: 16423
Author: rana 
Type: Summary 
Category: PEM 
Subject: Particle counter setup near BS Chamber 

rethinking what I said on Wednesday - its not a good idea to put the particle counter on a vac chamber with optics inside. The rumble from the air pump shows up in the acoustic noise of the interferometer. Let's look for a way to mount it near the BS chamber, but attached to something other than vacuum chambers and optical tables.

Quote:

I have placed a GT321 particle counter on top of the MC1/MC3 chamber next to the BS chamber.

 

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