Electron Gun Group Vacuum
EGG main page

Photo-Electron guns require Ultra-High vacuum (UHV) in order to maximize quantum efficiency and cathode lifetime.   The vacuum levels required for the electron gun exceed the requirements of any other portion of the CEBAF accelerator.

Extensive research has been performed within the Electron Gun Group to produce this UHV environment.  This research includes:
  • Bake temperature vs. ultimate pressure studies
  • Material Outgassing rate studies
  • Material coating studies
  • Neg materal selection and geometry studies
  • Ion pump ultimate pressure studies


The Electron Gun group at Jefferson Lab also has also partnered with a company called Eye On Science, LLC to develop an ultra-sensitive ion pump controller that can measure ion pump currents down to the pico-amp regime.  This product has been an invaluable asset to our studies and is now commercially available at EyeOnScience.com
                                                                                                                                                                     http://www.eyeonscience.com







 

 


Many of the documents in the Electron Gun Group pages are in .pdf format.
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Site maintenance performed on Sept. 19, 2006
Maintained by marcy@jlab.org