Electronics > Projects, Designs, and Technical Stuff
Homemade X-Ray Machine: Liftoff
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AutogolazzoJr:
Well, after 5 or so months of posting odd questions on the forum, it's finally done.
I got the idea from this:
http://4hv.org/e107_plugins/forum/forum_viewtopic.php?106277.0
I used a Russian 2c2s tube to produce x-rays. For the high voltage, I used dual flyback transformers with two zvs drivers, with secondaries in series and 5+5 primaries, each primary going to its respective zvs driver.
The total generated voltage is around 50kv-70kv. The voltage was able to jump from an alligator clip and a ~20 gauge wire spaced 7.5cm apart. Yes, I was shocked by it. It hurt.
The 50kv was applied to the 2c2s tube in series with a ~.8Mohm resistor. With the power supply turned down to about 25kv, the geiger counter went off like crazy, but their was no illumination of the x-ray phosphor screen. With maximum power (30v through an LTC3780) it dimly lit the phosphor and produced hard x-rays (penetrated aluminum foil).
Sadly, both 2c2s tubes burnt out and the ltc3780 module was fried. I hope to be doing more work on this project. I have ordered 2 more 2c2s tubes and an american 2x2a.

UPDATE 6/10/20: It's been quite a while since i've touched this project, but I felt like detailing what I actually did. So, I used two of these for the power supply.

Both of these were fed (in parallel) by one of these boost converters.

I adjusted it to output 30v and as close to 20A as possible.
The flyback transformers were connected in series and the russian 2c2s tube was connected in reverse polarity (anode grounded, and all of the cathode pins connected to hv).

Gallery: https://imgur.com/gallery/BbXQRhR
AutogolazzoJr:
BTW: inverse polarization was used, with the anode grounded and cathode to HV+.
These clips are blurry, but I swear that the image on the phosphor was sharp.


https://www.youtube.com/watch?v=QtNm9qtkJQ4&feature=youtu.be
KE5FX:
Keep up the good work, and don't be this guy. :)

I'm sure you know to be cautious when using a Geiger counter to check for the presence of X-rays, since the tube can saturate.  But for the benefit of those following along at home: if the counter ever goes completely quiet, it means that either your HV supply has broken down, or that your DNA is in the process of doing so.  :scared:
AutogolazzoJr:
I've heard of him. I hope my fate isn't the same as his. From now on, all tests will be behind lead or remote.
AutogolazzoJr:
https://www.ebay.com/itm/DC-DC-Converter-10-12-15-20A-150-250-300-400-1200W-Step-up-Step-down-Buck-Boost/382219150784?_trkparms=pageci%3A712b3957-27fc-11e8-8f5d-74dbd180804a%7Cparentrq%3A2796433f1620a861f027772afff92151%7Ciid%3A1&_trksid=p2481888.c100675.m4236
Is this a good replacement for the ltc power supply? Does it really supply that many amps?
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