[time-nuts] Re: Digging deeper into the Cs tube

[Ed Marciniak]

For uniform field, I’d expect that c-field would be parallel traces all carrying the same current when parallel rather than a solenoid configuration. If you simply had alternate ends strapped the fields would reverse rather than be homogeneous.
________________________________
From: paul swed via time-nuts <time-nuts at lists.febo.com>
Sent: Saturday, September 16, 2023 10:40:33 AM
To: swithrow at alum.mit.edu <swithrow at alum.mit.edu>; Discussion of precise time and frequency measurement <time-nuts at lists.febo.com>
Cc: Skip Withrow <skip.withrow at gmail.com>; paul swed <paulswedb at gmail.com>
Subject: [time-nuts] Re: Digging deeper into the Cs tube

More exciting pix. to add to the collection.
Couple of questions.
The bands of copper running along I think the wave guide. C field.
What are the 8 or so wires coiled in a figure 8?
Lastly I have seen C tubes with cut off wires. I think ebay for cheap.
(Because their dead. Chuckle)
With the great pix of the wires going in can you please make a cheat sheet
of each lead. I would be happy to do it if you would like.
Thinking ppt with simple thermistor cfield etc.
Might make it tempting to grab a cut wire unit. Nutty as that seems and the
worst possible gamble.
Best regards Skip and thanks for sharing.
Paul
WB8TSL


On Sat, Sep 16, 2023 at 1:56 AM Skip Withrow via time-nuts <
time-nuts at lists.febo.com> wrote:

> Hello Time-Nuts,
> I took a second look at the Cs tube that I opened up recently and decided
> to dig a little deeper.  Previously, after cutting a window in the mu metal
> shield around the microwave waveguides, I found that there was another mu
> metal shield under that.
>
> CsTube-1 - I decided to drill six strategic holes in the outer case so that
> I could unscrew the fasteners for the outer mu metal shield to remove it
> altogether.
>
> CsTube-2 - Shows the outer mu metal shield (with the window that I had cut
> in it).  It was necessary to bend up the mounting flange a bit to clear
> other fasteners.
>
> CsTube-3 - I cut a window in the second mu metal shield and found that the
> microwave waveguides are wrapped in Kaption.  The shield fits very tight to
> the bits that it encloses.
>
> CsTube-4 - The C-field coil is embedded in the Kapton wrap.  You can see
> the copper stripes running lengthwise along the bottom of the tube.
>
> CsTube-5 - The microwave waveguide is at either end of the cut out window
> (the screw heads appear to hold all the copper bits together to form the
> waveguide.  You can see the rectangular hole that the beam passes through
> as it travels through the waveguide from one of the tube to the other. I
> suppose that I could remove the Kapton on the side to expose things better.
>
> Enjoy,
> Skip Withrow
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