See Also: Review of Scientific Instruments 79, 093904 (2008); https://doi.org/10.1063/1.2981699 Review of Scientific Instruments 80, 026106 (2009); https://doi.org/10.1063/1.3079688 While not related to your problem, it gives a good overview of what happens with closed loop control. Steve
25kV AC
Started by ●September 30, 2019
Reply by ●October 1, 20192019-10-01
Reply by ●October 1, 20192019-10-01
On a sunny day (Tue, 1 Oct 2019 09:30:28 -0700 (PDT)) it happened sroberts6328@gmail.com wrote in <443d29d7-c518-49e9-940a-1a2b99ec0503@googlegroups.com>:>One thing I forgot to mention. Shunt regulators can give off low energy X-rays. >Low Energy X-rays are not fun, as their tissue adsorption is very high. A 1/8th inch thickness aluminum box was sufficient for >our purposes. > >SteveYes, this was also a thing with KTV parallel stabilizers (PD500) at 25 kV https://www.radiomuseum.org/tubes/tube_pd500.html a colleague of mine ran a set without the metal screening and get his face all burned red. After a while the glass would turn a bluish color from the Xray radiation. https://www.youtube.com/watch?v=MooYX2RqJTs Once had a bunch of these tubes...
Reply by ●October 2, 20192019-10-02
Winfield Hill wrote:> Bert Hickman wrote... >> >> I'd recommend using a small oil-immersed 60 Hz dental X-ray >> transformer powered from an autotransformer. The frequency >> should be in the right ballpark, you can easily tweak the >> output voltage, and the power level should be in the ballpark. >> Larger X-ray transformers are also available on the surplus >> market if you need higher power. > > Ah, dental X-ray transformer, awesome, thanks Bert! > Do you think I'll be stuck with using transformer oil? > Maybe with degreasing and vacuum degassing thrown in? >Win, it does indeed need to be operated under mineral/transformer oil to prevent corona and tracking damage. If the transformer has been pulled out of the X-ray head and oil for any length of time, it should be fully re-submerged and vacuum degassed to remove entrapped air. Since you only need ~25 kVRMS, a variable autotransformer will allow you to easily reduce primary voltage for the desired output.
