28 Sep
2012
28 Sep
'12
1:14 p.m.
On Fri, 28 Sep 2012, Dave McGuire wrote:
On 09/28/2012 01:29 PM, Alexey Toptygin wrote:
Can it be that bad? In halogen lamps the envelope is full of chlorine
which is even more electronegative than oxygen. Admittedly the valence is
different, you're not discharging through the gas, and the lower pressure
will make the tungsten evaporate faster, but I imagine/hope it would at
least last hours or days. Alternatively, you could try to build a barrier
that's impermeable to oxygen but permeable to high energy electrons. But
I'm probably overthinking it. Surely there is another element that will
emit mostly in the green part of the spectrum?
Alexey
On Thu, 27 Sep 2012, Tony Duell wrote:
Uhh...ya think? ;) I'd bet the electrode life would be measured in
single- or two-digit MINUTES depending on their thickness. No. AFAIK _no_ green displays are nixie tubes
(what gas would they have
to contain I wonder?)
Oxygen at a suitable pressure? IIUC at very low pressure it glows red,
at higher pressure it glows green and at suffieciently high pressure the
decay is non-radiative. I'm guessing you'd have problems with electrode
erosion though.