>> -Original Message-
>> From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of John
>> Ponsonby
>> ... It turns out that the resonant frequency of the cavity is much more
>> critically dependent on its diameter than on its length. So it would be best
>> to be able to mount the
> -Original Message-
> From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of John
> Ponsonby
> ... It turns out that the resonant frequency of the cavity is much more
> critically dependent on its diameter than on its length. So it would be best
> to be able to mount the bulb in
"Copper has a quite high temperature expansion, so could you servo
that via the cavity temperature ?"
To answer, both Copper and Aluminum cavities use the temperature setting
to coarse tune the cavity.
Fine tuning is via Varactor diode and modern Masers do servo "Auto-tune"
the cavity to reduce
In message <8ee9c792-a2f6-402d-9d07-f8929f656...@gmail.com>, John Ponsonby writ
es:
> It turns out that the resonant frequency of the cavity is
> much more critically dependent on its diameter than on its length.
Copper has a quite high temperature expansion, so could you servo
Re: EFOS Maser turns 34!
In a hydrogen maser the hydrogen atoms have to be confined in a
storage-bulb within which the oscillating RF magnetic field is all in-phase.
The storage-bulb has to be made from fused quartz for mechanical stability and
for very low dielectric loss. The bulb
