[time-nuts] Pressure related rubidium oscillator aging

[Dana Whitlow]

What you say makes good sense, as He does not stick around very well- it
would
tend to diffuse out through the cell walls.

I once spoke with a fellow involved in the deep sea diving business, and he
claimed
that vidicon cameras used in the deep habitats used to deteriorate in
performance in
a matter of days due to in-diffusion from the high pressure He atmosphere.
They
had to order custom vidicon tubes made of special glasses for which He
diffusion
was much lower.

Dana


On Tue, Aug 14, 2018 at 4:21 PM, Attila Kinali <attila at kinali.ch> wrote:

> On Tue, 14 Aug 2018 14:23:56 -0500
> Dana Whitlow <k8yumdoober at gmail.com> wrote:
>
> > Does the Rb cell use He as a buffer gas?
>
> AFAIK most use a Ne/N mixture these days. I am not sure whether
> I have seen He used as buffer gas for Rb cells, but I do not think so.
> Other noble gases (Ar, Xe, ...) popped up a few times, though.
>
>                         Attila Kinali
> --
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