[time-nuts] Re: Creating a D.I.Y Rubidium Atomic Clock

[Marek Doršic]

Certainly interesting topic. Rb provides a safe approach. However, I am curious to know if anyone has explored the possibility of using other elements, specifically Indium?

   .md

> On 7 Jun 2023, at 20:37, djl via time-nuts <time-nuts at lists.febo.com> wrote:
> 
> The Rb capsules are available on ebay, eg:  124012486501
> the classblowing part is done?
> 
> On 2023-06-07 07:50, Richard (Rick) Karlquist via time-nuts wrote:
>> On 6/7/2023 5:03 AM, Stephen C. Menasian via time-nuts wrote:
>>> 1) some pure Rb87
>>> 2) a glass blowing setup (and some skill)
>>> 3) A selection of inert gasses (at least including Ar)
>>> 4) Light source (Rb discharge was used then with a circular polarizer;
>> At HP we had really skilled glass blowers, with specific experience in
>> making Rb glassware.  We had to use an exotic grade of glass that was
>> only one step removed from fused quartz.  It had a part number that I
>> don't remember.  Very difficult to work with.
>> The Rb lamp (one of three pieces of glassware) is very tricky to work
>> with.  We used a resonant coil driven at 95 MHz at several watts.
>> The trick is to "strike" the plasma and make the lamp light up;
>> you can at least see visible light when that happens. I spent a
>> lot of time fooling with it.  We never got it to work as
>> well as the 5065 lamp.
>> BTW, one of the Rb isotopes is slightly radioactive.  Might be
>> hard to get as a hobbyist due to regulations.  The physicist I
>> sat next to had a tank of it illegally stored in his cubicle.
>> Rick
>> N6RK
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