Absolute vacuum less than 1 micron, pirani gauge for vacuum, capacitance gauge for filling pressure. Manifold made from plumbing parts. Note home made cross fires in front of picture. Here I have been testing the manifold components It has been found that these aluminium bottles will waste some gas, because they are never airtight. When getting below atmospheric pressure, air is sucked in and will contaimnate your rare gas.
Bottles are refillable easy.
Pump them down to less than 1e-6 anf just fill. Here I you see me testing the bombarder transformers. Problem in using scrap transformers in combined circuits is the secondary insulation. All parts passed the 15kV. Rare gases used To get an imagination how the different rare gases will glow when excited by high voltage electricity, I've done this for demomstartion. Xenon will be added soon.