Maybe I am missing something when it comes to the way this works, but, when it is not a vacuum as is required for a valve/tube then what about the idea of pump a bit, add some of the eventual gas, pump again etc. The original impurities would distribute 'evenly' through the added gas and when it was pumped out a percentage of that older pollutant would be removed again. Thus it seems to me that a quite 'feeble' pump can do the job when the eventual fill is a gas [even if at a lowish pressure].
John K Australia ----- Original Message ----- From: Nick To: neonixie-l@googlegroups.com Sent: Thursday, February 12, 2015 2:38 AM Subject: Re: [neonixie-l] Dalibor's Nixie tube: R|Z568M None of this seems really necessary - the research I've been doing implies that 1 micron (10-3 Torr) is enough for a pump-down and that should be achieved in just a few minutes. I can see the need, just maybe, for a TM pump if working on an industrial scale (or if someone gives you one!), but assuming at best I need 10-4 to 10-5 Torr, I'll stick with a fairly normal molecular diffusion pump and suitable multi-stage backing. Nick -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/167d94e8-fdc6-4a2b-ad2d-116490dbc1b3%40googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/8134E1BA08664F5C967A42639C806DFE%40compunet4f9da9. For more options, visit https://groups.google.com/d/optout.
