DIY X-Ray Source

This is the final product of my DIY zvs x-ray experiment, A full demonstration video that shows a ZVS flyback driver powering a beam triode in a cold cathode configuration, resulting in x-ray emission above 18,000 volts. The resultant X-rays emitted from this tube are just above the minimum energy level the SBM-20 Geiger tube can detect, which is around 1 keV. Because of this, these x-rays are what are known as soft x-rays, which are mostly absorbed by the leaded tube glass. The x-rays that successfully penetrate the tube glass carry on for around 10 feet before my Geiger counter is no longer able to detect above background. The tube glass glows a beautiful blue color as it fluoresces, and the resultant detected x-rays lie in the 2000 CPM and 18 uSv/hr zone, which varies with distance. I believe these x-rays are too low energy to activate my x-ray cassette, which is used for photographing broken limbs. The substrate of the cassette is DuPont Cronex Super Pan-O-Screen. With a number sequence 022309 following. The soft x-rays produced are quickly attenuated in water and air, resulting in 10 foot carry distance and also necessitating lead shielding, since the body is mostly water, the x-rays attenuate fairly quickly in skin, therefore making it impossible to image with this system due to none of the x-rays successfully penetrating your body and instead all being absorbed. I wear a lead lined radiology jacket when experimenting, which completely blocks all radiation exposure from soft and hard x-rays.


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