[time-nuts] Home built Ammonia cell std !! / Home built cesiumclocks???
Magnus Danielson
magnus at rubidium.dyndns.org
Sun Jun 29 18:10:16 UTC 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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