[time-nuts] backfill

Charles Steinmetz csteinmetz at yandex.com
Thu Jun 8 19:18:04 EDT 2017

Bob wrote:

> You really want to use Helium. Hydrogen is a bit reactive.

I don't think it's a problem.  The alternators on mains powerplants are 
filled with Hydrogen under fair pressure, and the internal materials and 
conditions are not that different from a crystal oscillator inside an 
oven.  (IH was chosen both for its heat conduction and its low windage. 
  Helium is enough worse on both counts that it was a non-starter.  Of 
course, windage isn't important in a crystal oscillator.)

In any case, it can't be any worse than filling space capsules with 


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