[time-nuts] How to create a super Rb standard
379998 at qq.com
Wed Jan 18 00:23:33 EST 2017
I am wondering if anyone tried to put a Rb unit into a vacuum container. And how much the performance is improved? Someone told me that's why the Rb clocks are more stable than Cs clocks on the GPS satellites.
From: "Bob Camp"<kb8tq at n1k.org>
Date: 2017/1/17 21:20:23
To: "Discussion of precise time and frequency measurement"<time-nuts at febo.com>;"Perry Sandeen"<sandeenpa at yahoo.com>;
Subject: Re: [time-nuts] How to create a super Rb standard
Since the physics package in the small Rb’s is different than the stuff in the large units,
you have some basic limits on what you can do to improve them. The main things people
have done are to modify them to turn off the temperature compensation and replace it
with some sort of precision controlled thermal enclosure. Pressure compensation is a good
idea on any of these parts (large or small). How much your particular unit benefits is a
“that depends” sort of thing.
> On Jan 16, 2017, at 10:24 PM, Perry Sandeen via time-nuts <time-nuts at febo.com> wrote:
> It looks like their is as infinitely small chance of being able to get 5065.
> So what can be done with the telco Rb's (mine are analog tuned) to wring the best possible performance from them? Sooper Duper power supplies, Peltier (sp) cooling modules?
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