Nice solution, but I am afraid I would destroy the flask and let the neon go out ;-) If I were from US I would try it, but because I am from EU where we have nothing like this or if we have, it is several times the price in US, I will use a cangas bottle :-(
The solution with magnet is very nice! Dalibor 2012/5/21 John Rehwinkel <[email protected]> > > Neon is quite expensive; about 50EUR for 12 liters. It is a pressurized > bottle at 12bar, so it almost looks like a can of hair spray ;-) > > You should be able to do better than that if you don't need that much neon. > > http://www.montroy.com/catalog/main/itemdetail.app?item_no=NEON > > It's 0.9 liter of neon at atmospheric pressure for about US$20. This way, > you can get away without a pressure regulator or > needle valve. Fuse the flask onto a bit of tubing on your manifold with > two stopcocks near each other*. Once you're pumped > down, spin the one closer to the flask a half turn (which will quickly > open and close it again). This will trap a little bit of > neon between the two stopcocks, at a pressure somewhat below atmosphere > (this will drop as the neon is used). Then > meter the neon into the manifold with the second stopcock. Since you're > partitioning out maybe half a milliliter of neon at > atmospheric pressure or less into a manifold that's considerably larger, > even if you just leave the second stopcock open, > you'll already be down to something in the useful range. If you want more > pressure, close the second stopcock and spin > the first again. > > This is not a precision setup by any means, but for those of you who'd > like to play with neon on the cheap, it's a reasonable > way to get going without spending too much money. > > * These glass flasks have a thin glass seal to keep the neon in. The > usual way to open one is to put a clean piece of > ferrous metal in the tubing before sealing it up. Then open both > stopcocks and run your vacuum pump until the manifold > is pumped down good. Then close the stopcocks and use a magnet to yank > your metal chunk over to break the glass seal. > If your metal chunk isn't clean, your neon will be contaminated. > > - John > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To post to this group, send an email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/neonixie-l?hl=en-GB. > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
