Tube installed Oct 31, 2011

 Note the tube was built Feb 16, 2011. This means that when the tube was installed it was 8 ½ months old.

When it started failing in mid-Feb 2012 it was over 1 year old, even though it only had 80 hours of actual activation since being installed on Oct 31, 2011.


Some of the failure mechanisms we’ve heard mentioned include:

  • Electrode erosion (due to excessive current)
  • Optical failures (mirror or exit window)
  • Leakage (degradation of resin seals)
  • Out-gassing (contamination of gas in tube mainly by seals)
  • Exhaustion (change in gas chemistry, notably CO2 into CO)


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