Thanks David, it had occurred to me that the halogen may eventually react with the cathodes, but wasn’t sure at what rate....sounds like it’s pretty fast.
Cheers. Sent from my iPhone > On Jul 18, 2020, at 17:13, David Speck MD <dr.sp...@davidspeckmd.org> wrote: > > > Nicholas, > > Iodine (and all of the halogens) produce excimers (excited dimers) with the > noble gases. Excimers do produce unusual colored discharges, but they have a > problem -- there is nothing more chemically reactive than an ionized halogen. > > > Tubes containing metal electrodes and a halogen "clean up" rapidly, as the > ionized halogens react with and permanently bind to the metal electrodes. > After a relatively short period of operation the halogens are depleted. > > Some plasma sculptures are made with halogens, and do produce interesting > colored displays, but the halogens will even attack the silicon dioxide of > the glass envelopes, and clean up after some period of operation. I've seen > a traffic light red plasma globe that used neon plus a halogen, as well as a > lovely turquoise globe that used a halogen plus one of the heavier noble > gases Neither had a long lifetime. > > Dave > > On 7/17/2020 11:38 PM, Nicholas Stock wrote: >> I wonder if anyone ever tried adding a few iodine crystals to a nixie? I >> know it’s added to some plasma tubes to give a certain plasma color (i have >> one....nice blue tinge to the plasma glow).... >> >> Hmm.... >> -- 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 view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/083C5728-D023-4166-A01A-D6B0FC078EA2%40gmail.com.
