[time-nuts] Home built Ammonia cell std !! / Home built cesiumclocks???

Magnus Danielson magnus at rubidium.dyndns.org
Sun Jun 29 14:10:16 EDT 2008


From: "John Franke" <jmfranke at cox.net>
Subject: Re: [time-nuts] Home built Ammonia cell std !! / Home built cesiumclocks???
Date: Sun, 29 Jun 2008 14:02:06 -0400
Message-ID: <004301c8da12$3e04fd40$1e89a662 at youre7075dc078>

> No, I am talking about the 1948 gas absorption design by Lyons, not the 
> ammonia MASER.  There is no state-selection.  There is no flowing gas 
> molecules.  There is no quadrapole device.  It is a simple oscillator locked 
> to the attenuation dip in an absorption cell.  Once built, there is no gas 
> replenishment or need for additional pumping.  But, the accuracy is limited. 
> By the way, Lyons cell path was 25 feet not 33 feet as I had thought.

Sorry, my bad. I suspect wall-pulling is significant.

Cheers,
Magnus



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