Paul,
You mean, as all time-nuts already have redundant sites with at least 4
5071As with high-performance tubes, redundant cesium and rubidium
fointains, set of active hydrogen masers, with everything in tight
temperature, humidity and pressure control, UPS and diesel-engines,
GPS/GLONASS/GALILEO receiver on temperature-stabilized piller and
antenna, do TWSTFT to major labs... since money is no issue, right?
The main problem with cesium tubes as I recall it is really the ionizer
in the mass-spectrometer being poluted with cesium, this then creates
bad S/N before running out of cesium in the oven.
Yes, I agree it would be a great clock to have, but practical limits in
cost is a challenge for most, so it would be interesting to look at it
and ask how cheap it could be done.
Cheers,
Magnus
On 11/01/2014 03:21 PM, paul swed wrote:
Magnus,
But for a time-nut how can price even enter into the conversation? Plus it
only draws 10s of watts. A green super duper clock. Other comment I read is
that there is no part that will wear out. Granted I suspect over many years
something happens, but its not the typical CS depletion. I might speculate
the glass windows fog or something or on earth the evacuated chamber
ultimately leaks or the metal in the vacuum release stuff.
No idea but pretty sure I won't be putting a watch on ebay any time soon.
Regards
Paul
WB8TSL
On Sat, Nov 1, 2014 at 6:42 AM, Magnus Danielson <[email protected]
wrote:
Hi Bob,
The traditional Hg ion clock with it's 40,5 GHz frequency is doable, but
it would be interesting if it could be commercialized at a (time-nuts)
friendly price.
The modern optical clock got much easier to work with when the frequency
comb was invented. The frequency comb and stable lasers is now
commercialized, but not cheap, not cheap at all.
Cheers,
Magnus
On 11/01/2014 02:27 AM, Bob Camp wrote:
Hi
Trapped ion clocks have been the “obvious successor” to a Cs tube for at
least 30 years. There is a *lot* of very fancy work involved in getting
from 10 MHz up to a very specific light wavelength with low ADEV and good
phase noise…..
Rocket science indeed. Time Nuts rocket science, but tough to do none the
less.
Bob
On Oct 31, 2014, at 8:09 PM, paul swed <[email protected]> wrote:
Humor aside. I did dig deeper. It seems that this technology could be
commercialized in larger volumes and might land in the same cost as a
good
CS does today. Technically it looks reasonable.
Regards
Paul
WB8TSL
On Fri, Oct 31, 2014 at 1:45 PM, paul swed <[email protected]> wrote:
Jim
I am sorry to say thats the wrong clock picture.
That picture is of 2 glass coffee tables and a toaster in between.
I see you can order that art om ebay. Item number 142657nottoday3245
Regards
Paul
WB8TSL
On Fri, Oct 31, 2014 at 1:36 PM, Jim Lux <[email protected]> wrote:
OK, I know you all want to go get one...
http://discoverjpl.jpl.nasa.gov/posts/520
It's Bob Tjoelker in front of the Deep Space Atomic Clock (DSAC) being
tested for magnetic field sensitivity. It's a trapped ion clock, 1
liter/1
kg, orders and orders of magnitude better than a USO in performance.
(if it's in the building I think it's in, the rebar is made of
non-magnetic stainless steel)
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