[time-nuts] Optical link connects atomic clocks over 1400 kmof fibre

[David J Taylor]

From: Bruce Griffiths

You'd need a rather thick copper jacket to shield effectively against the 
50Hz magnetic field.
Bruce
==============================

Would mu-metal be any use?

  https://en.wikipedia.org/wiki/Mu-metal
  http://mumetal.co.uk/

Cheers,
David
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