[time-nuts] Helium and MEMS oscillators don;t mix well
kb8tq at n1k.org
Thu Nov 1 11:47:14 EDT 2018
A lot of Radon and *really* poor ventilation….
There are a lot of ways for He to show up. In normal use, issue is hanging on to it.
It tends to run away from its source very quickly. Maintaining a measurable concentration
in something like a normal room …. not very easy at all.
> On Nov 1, 2018, at 3:04 AM, Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:
> In message <b584a9e5-c2ac-7951-f499-3601c2e25408 at karlquist.com>, "Richard (Rick
> ) Karlquist" writes:
>> According to Jack, radon emits alpha particles, AKA helium nuclei.
>> These capture stray electrons and become helium atoms. So the
>> presence of helium is a marker for radon. The fact that the half
>> life is a few days supports this hypothesis. At least that is what
>> Jack told me.
> Right, but you need a LOT of Radon before the Helium concentration
> becomes a problem, and the alphas would literally make things
> glow in the dark.
> Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
> phk at FreeBSD.ORG | TCP/IP since RFC 956
> FreeBSD committer | BSD since 4.3-tahoe
> Never attribute to malice what can adequately be explained by incompetence.
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