jeff Member

  • Member since Jul 5th 2014
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  • jeff

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    (Quote from JedRothwell)

    One thing I noticed is that H2 (or D2) gas has a high thermal conductivity, particularly at relatively high pressures. This phenomenon was observed in a Celani-type of experiment, where the temperature of the internally heated…
  • jeff

    Post
    (Quote from Paradigmnoia)

    LDS Vacuum will fabricate CF full nipples to any desired length. A 6" CF flange diameter corresponds to a 4" tube OD, which is close to the 120 mm you stated. A CF full nipple has removable flanges at both ends, and the flanges…
  • jeff

    Post
    (Quote from Alan Smith)

    A few questions/comments:

    I notice that some of the system appears to have a heater blanket, but some of the small diameter tubing does not. Assuming that you plan to bake out the system, does this unheated tubing make a difference?…
  • jeff

    Post
    The used Pfeiffer diaphragm pump I received was a total mess and would not pull below ~50 Torr. One of the diaphragms had ruptured, and corrosive gas got inside, freezing the bearings and damaging the camshaft. The bearings had to be ground off, and the…