[time-nuts] Re: hydrogen rich environment and oscillators

[Steve Hendrix, P.E.]

FWIW, hydrogen is a bigger molecule (2 atoms) than helium (1 atom, 1 
molecule). That's why helium is used for leak testing. If helium won't 
leak, neither will anything else.

Steve Hendrix

On 2022-12-08 04:28 PM, Lux, Jim via time-nuts wrote:
> OK, here's an interesting one for you all:
>
> Does anyone have any information on what happens to hermetic TCXOs 
> when they're in a hydrogen rich atmosphere? There's stories about MRI 
> machine He rich environments killing Apple watches - I think, though, 
> that was a MEMS oscillator. The data shows a reduction in Q because 
> the resonator's not in a vacuum.  And I'm aware of pressure sensors 
> failing because they rely on a vacuum for comparison. But I wouldn't 
> necessarily think this is the case with a quartz crystal.  Or is it?  
> H2 is somewhat more reactive than He, too.
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