Ok, in that case he probably does use an aluminum filter. I'll have to come up with one, my X-ray machine is just on paper right now, High performance auto ignition coil with a pulse generator producing up to 50,000 volts, some voltage dividers attached to an analog meter to give me a accurate read on output voltage, and a mA meter to monitor filament current. I'll prob be using a New Old Stock, Russian X-ray tube, and use a surplus AGFA intensifier screen to help calibrate my s-ray projection circle size. I used to be a professional photographer, and have probably performed every type of camera operation, and darkroom procedure known including hypering film, inspection developing, print copying with polarized lights, etc. This is essentially the same thing but with photons I cannot see, and such. I also own working GEIGER counters, and an ION detector, and Dosimeters. All are Victoreen civil defense units that I have refurbished and fixed up, and calibrated with known sources.

 out of  found this valuable. Do you find this valuable?