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Entry  Thu Feb 5 02:04:39 2015, Zach, DailyProgress, SiFi - ringdown, No big Q increase at low temperature 
    Reply  Fri Feb 6 04:23:20 2015, Zach, DailyProgress, SiFi - ringdown, No big Q increase at low temperature 
Message ID: 1193     Entry time: Thu Feb 5 02:04:39 2015     Reply to this: 1194
Author: Zach 
Type: DailyProgress 
Category: SiFi - ringdown 
Subject: No big Q increase at low temperature 

Dmass helped me solve the Great Funnel Problem of 2015 by fashioning a foil extender to put in the tip of his metal funnel, since my glass funnel has a spout that is too narrow to get enough nitrogren through it. We spent some time yesterday afternoon filling the reservoir, after which I waited and then came back to see if it was still holding liquid. It was, so I added some more and left it overnight, and there still seemed to be some liquid by late this afternoon.

Assuming the cold volume had had enough time to reach low temperature, I made a quick ringdown measurement, only to find that the Q had only increased from ~4000 to ~8000 between room temperature and now. I think this means that the clamp integrity afforded by the sapphire washer sitting on just the lip of the steel clamp is not good.

I'm going to wait for things to warm up and then vent the chamber so that we can:

  1. Improve the clamp
  2. Fix our wiring issues
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