• Main INDEX
  • Monthly INDEX
  • PREV
  • NEXT

    User name brads

    Log entry time 10:50:17 on April12,2008

    Entry number 231579

    Followups:

    keyword=He concentration in/around flangle

    The He concentration at the sieve plate opening at the top of the flangle is in the 10e4--10e5 ppm on the scale (ie. 1--10% I guess). That reading is with a fan blowing into the area too.

    I also stuck the probe in the outflow feedthrough on the flangle to measure the concentration inside. It went off-scale right away -- that is a good sign.

    The meter was zeroed near the Tech computer in the Hall.

    Concentrations 1m away from the flangle and inside the Hadron stack (multiple locations) were all in the 500 ppm range.