[time-nuts] H-Maser drift (was: Why discipline Rubidium oscillator?)
EWKehren at aol.com
EWKehren at aol.com
Tue Nov 21 15:18:14 UTC 2017
Corby can most likely answer some of these questions, since he also has a
maser and does maintain it. He is right now most likely still asleep,
California time.
Bert Kehren
In a message dated 11/21/2017 9:25:30 A.M. Eastern Standard Time,
attila at kinali.ch writes:
On Tue, 21 Nov 2017 15:14:59 +0100
Ole Petter Ronningen <opronningen at gmail.com> wrote:
> > [...] The advantage of the platinum valve
> > system is that it "generates" single atom Hydrogen, as required
> > by the maser.
>
> Picking nits here.. It was my understanding that the splitting of
molecular
> hydrogen into atomic hydrogen happens using RF in the dissociator - not
in
> the platinum leak valve. Is my understanding incorrect?
Good question. I don't know. I've only read a dozen or so papers on
maser construction. I have never owned or operated one. Much less
taken appart and studied its construction.
> > Within the cavity there is a small glass bulb that keeps the atoms
> > in the right position of the cavity field.
>
> 4.5 liters in EFOS type masers - so not *that* small. I believe other
> masers are the same order of magnitude.
Hehe.. Yes. It's "small" compared to the cavity. Depending on the
exact cavity construction, the storage space can be as small as
a tenth of the total cavity volume.
Attila Kinali
--
It is upon moral qualities that a society is ultimately founded. All
the prosperity and technological sophistication in the world is of no
use without that foundation.
-- Miss Matheson, The Diamond Age, Neil Stephenson
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