Protovec-1

• GE180 cell with 5:1 K/Rb alkali ratio and filled to 6.7amg 3He.
• File:Http://hallaweb.jlab.org/equipment/targets/polhe3/lab/ccell/protovec1 dimensions 20oct2011.pdf

  Dimensional Drawing of cell
  .

Note about cell dimensions from Al Tobias -- "I regret that we forgot to measure the distance between the transfer tubes right under the pumping chamber. I remember making a rough measurement of the tubes, and found that they are indeed just under 2-inches apart (from central axis to central axis). I'll try to accurately measure this as soon as I have safe access to the cell. Let me know what distance below the pumping chamber your cell holder plate for the oven will attach to the cell's transfer tubes. Also note that I believe I kept the pull-off height less than 1.5" long. This dimension is hard to measure since the pumping chamber is not really spherical. So I measured from the bottom of the pumping chamber to the top of the pull-off."

• Made by Mike Souza mid-July 2011 at Princeton.
• Filled by Al Tobias Sept 15, 2011 at UVa.