[time-nuts] Vibration isolation of quartz oscillators

[Mike Garvey]

You could make some reasonable assumptions about vibration levels and
g-sensitivity and calculate the effect on ADEV.  This would let you know if
you're in the ballpark for your requirements.  
Also, Lord makes vibration isolators that address topics like damping and
they are designed to do it in minimalist space.  Likely not to be able to
get much isolation at 100s without the rubber suspensions, I suspect.  You
might also look at the work at NIST on the trapped ion work where they hung
(search Jim Bergquist) local oscillators from surgical tubing.

Mike

-----Original Message-----
From: time-nuts [mailto:time-nuts-bounces at lists.febo.com] On Behalf Of
Michael Wouters
Sent: Saturday, June 27, 2020 08:03
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] Vibration isolation of quartz oscillators

I have three Oscilloquartz 8607-Bs that I'm rehousing.

In their former life they were part of the frequency synthesis chains
for H-masers and they hung vertically from a rubber suspension that was
presumably intended to provide vibration isolation. Unfortunately, the
person responsible for this has long since retired so is no longer
around to ask questions of.

In the experiment I will be averaging over  100 s, which suggests to
me that very low frequencies are what I need to filter out (if at
all), and I am skeptical that the rubber will do this. Space is tight
so I am wondering
whether I should simply ditch the isolation.

What do other people do with their quartzes ? I thought I should ask
for some advice before attempting measurements.

Cheers
Michael

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