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PICList Thread
'X-Ray generator'
1998\05\08@184102 by Dave Mullenix

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If you want to make your own x-rays, look for a book called "The Amateur
Scientist" by C.L. Stong.  This is a book of reprints of the old
"Scientific American" "Amateur Scientist" columns.  It was printed in
the early sixties.

In one of the articles, Stong shows you how to make an x-ray emitter out
of a diode vacuum tube.  The tube used would probably be hard to find
nowadays, but the information in the article should help you find a
substitute.

Other articles let you build an atom smasher (a small linear accelerator
powered by a van degraff generator) and a working microscope, which is
made from a glass rod melted in the flame from a kitchen stove.  It's
the same type of microscope van lewuenhook(spelling) used.  I built one
when I was  in high school and it works!  You can see microbes with it.

Just think, with one book, you can find microbes, mutate them and then
see what kind of damage they do to your innards!

And the X-ray source might erase your OTP PIC chips!

Dave Mullenix

1998\05\08@185508 by William Chops Westfield

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While it's easy to make your own x-rays, I think I've got to agree with
the guy who pointed out that making the efficiently enough to provide
the energy density (Watts/area) necessary to erase an eprom might be well
beyond amateur capabilities, even if it were possible to erase them that
way.  I think this number (W/cm^2) is published somewhere, and I can't
think of any particular reason why the number would be smaller for xrays
than for UV.  We all know that it takes pretty intense UV to do the erasing.
If you've got a little 4W quartz tube, your chip has be be very close to
erase in reasonable time...

BillW

1998\05\09@062202 by wwl

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On Fri, 8 May 1998 15:53:20 PDT, you wrote:

>While it's easy to make your own x-rays, I think I've got to agree with
>the guy who pointed out that making the efficiently enough to provide
>the energy density (Watts/area) necessary to erase an eprom might be well
>beyond amateur capabilities, even if it were possible to erase them that
>way.  I think this number (W/cm^2) is published somewhere, and I can't
>think of any particular reason why the number would be smaller for xrays
>than for UV.  We all know that it takes pretty intense UV to do the erasing.
>If you've got a little 4W quartz tube, your chip has be be very close to
>erase in reasonable time...
>
>BillW
There's a guy who has info on DIY x-rays, with some x-ray photos here:
www.mathematik.uni-marburg.de/~kronjaeg/hv/index.html
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