[time-nuts] 10811 crystal orientation

[iovane at inwind.it]

You are right, Tom, there are two mixed topics.

On the on-topic subject, instead of making tests to measure the frequency
dependence on orientation, It would be much more interesting looking at 
possible ADEV dependences on orientation, particularily for small tau (the 
bottom of the curve). I can't do the test myself now, but would be pleased 
to see it done. For someone here it should be easy. I suggest comparing 
the measurements made with the crystal on the horizontal plane vs a 
vertical plane.

On the pseudo-science subject, I would recall that the experiment you 
pointed us to (null result) was made in Germany for NASA under NASA invitation. 
The results of the tests are in conflict with previous tests made in China by 
S.W.Zhou -cesium clocks changed rate- and known to Nasa (I gave the link some 
posts back), and the matter is not yet solved. Maybe time-nuts could help in 
the process of understanding what happened.

Antonio I8IOV

tvb wrote:

> > Agreed. Has anyone done the crucial experiment? establish stats, rotate
> > assembly, establish stats, etc? Should be able to measure at least if
> > there is an effect, and also if it is present, an approximate magnitude...
> > Don
> 
> Hi Don,
> 
> There are two rather different topics here.
> 
> One is do crystal oscillators change frequency when they
> are turned. The answer to that is yes. This gravitational
> acceleration effect is rather huge, parts in ten to the 9th
> or so, and anyone can see this. This is why you never
> touch, bump, or move, or rotate a laboratory frequency
> standard (this includes GPSDO and cesium standards).
> 
> The other question is what happens to quartz crystals or
> pendulum clocks or werewolves during a solar eclipse.
> This is the possible pseudo-science topic, although I do
> applaud anyone who carefully looks into it. A recent and
> good example of such an experiment is described here:
> 
> "Effect of the 1999 Solar Eclipse on Atomic Clocks"
> <http://www.mpq.mpg.de/~haensch/comb/people/thomas/Nature99.pdf>
> 
> "On the Behaviour of Atomic Clocks during the
> 1999 Solar Eclipse over Central Europe"
> <http://www.mpq.mpg.de/~haensch/eclipse/full.html>
> 
> /tvb
> 
> 
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