Protovec-1
From Hall A Wiki
General Characteristics
- GE180 cell with 5:1 K/Rb alkali ratio and filled to 6.7amg 3He.
- Fabricated by Mike Souza mid-July 2011 at Princeton University. File:Next Convection Cell 16may2011.pdf for Prototype Convection Cell.
- Filled by Al Tobias Sept 15, 2011 at the University of Virginia. The image below on the left shows the cell attached to the gas system and (sitting on the gas system table) stainless steel tubing that comes down and circles around in a rectangle and back up. This is our LHe Cold Trap for the purposes of purifiying our 3He gas before it goes into the cell. Both the LHe Cold Trap and the cell are immersed in LHe in our box dewar. The 3He gas is first sent thru the stainless steel loop then into the cell.
- Actual Dimensions of Protovec-1. 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."
