Archived - Si(Li) x-ray detector

[Jon Rosenstiel]

Archived due to content, image quality and experimental results displayed well and for future identification purposes of others.

RH
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Bought this a while back (eBay). Didn’t really expect it to work, particularly after I saw this warning printed on the Dewar: “THIS SYSTEM MUST CONTAIN LIQUID NITROGEN AT ALL TIMES”.

Filled er’ up with LN2, waited several hours till she cooled down, and been havin’ a blast ever since. Check out the pic and the Co-57 spectrum.

Jon Rosenstiel
[attachment=1]CRW_0118.jpg[/attachment]
[attachment=0]Co-57.gif[/attachment]

[Starfire]

DROOL --- ) --- way to go Jon - would love to see the rest of the instrument compliment. -- What is the highest energy this system can see?

[Jon Rosenstiel]

John,
The only thing that is not shown is the hv power supply. (It's in the lower, not shown, nim bin). Or, is there something else you wanted to see?

Its range is from 1 to 30 keV.

Jon Rosenstiel

[walter_b_marvin]

Nice

[weaponeer]

Jon,

That rectangular mount with the "racetrack" o-ring is for an ISI/
Akashi/Topcon scanning electron microscope chamber. I've
got the Princeton Gamma-Tech EDS detector on my SX-40 -
almost identical.

Mark

[Jon Rosenstiel]

Mark,
Great info, thanks. You could probably answer this for me. Below is a close up of the "business end". I've figured out that the detector is the uppermost opening. What is the purpose of the other two openings?

I had originally planned to disassemble this thing completely to see "what makes it tick", but now that I know it works I believe I'll leave it alone.

Jon Rosenstiel

[weaponeer]

Jon,

I have not a clue, I have a single window. I wonder if they are
specialized (diff eV res) windows that turret about ?? I would
call EG&G before twisting it though!

Here is the PGT's business end -- and a pic of the mount this
fits -- here a ISI sx-30 I am working on. The mounts are the
same on my working sx-40, and the sr-50 that will someday be
turned into a fusor -- most likely sans the column.

Mark

[Jon Rosenstiel]

Mark,

Hmmm.... well there is a BNC jack on the back of the preamp labeled "DIFF", and what appears to be an solenoid or motor mounted opposite the preamp.

I'm away from home on a business trip right now, when I return later this week I'll post another photo or two showing the other side and back. Lots of interesting stuff.

Jon Rosenstiel

[Richard Hull]

I'll second that DROOL!

This is really nice! Might do a bit of XRF if pushed.

Richard Hull

[Jon Rosenstiel]

Mark,

Here's a pic of the other side. I looked at the "business end" a little more carefully, and as you have suggested, it appears to "turret" around.

Jon Rosenstiel