Another week, another featured project. This week, we have Uzzors' Coolidge X-ray Machine, a fascinating foray into the world of x-rays. He's managed to capture some very fascinating images in a very well-done thread. If something about the project strikes your fancy, please stop by Uzzors' project thread, and let him know what you think.
As always, feel free to PM me if you have a suggestion for the next featured project.
Uzzors wrote ... It's about time I tried using a Coolidge X-ray tube I bought on Ebay last summer. I was given no information on it other than it's a dentist tube, so everything will need to be determined empirically. The x-ray tube is 30cm long and 6cm in diameter. The filament has a resistance of about 0.2 - 0.3 Ohms, and is wound "Benson" style, or as a helical coil. So where do I start? I'll need to know an approximate power rating of the tube, and maximum voltage. Since the x-ray intensity is proportional to the filament temperature, I thought I could measure the anode current at very low filament temps, and assuming the anode current rises linearly with filament current plot a graph. A suitable filament current range can then be determined.   I don't even have ballpark figures for this tube, so your guess is as good as mine! Tube power and tube voltage.
Additional pictures:
Ipod nano and k750i:
 
TV flyback multiplier, digital watch and dosimeter:
 
Posted by Chris Russell on Thursday 14 May 2009 - 21:20:49
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