This is my website which details a small portion of both my hobby projects and academic research.
I hope you like it
This is my website which details a small portion of both my hobby projects and academic research.
I hope you like it
By far the most common radiation detector, the Geiger-Müller tube is essentially nothing more than a modified neon lamp.
Since I could not just go out and buy a portable x-ray machine at walmart I was forced to build one! I found it odd that such a device didn’t seem to exist, since such a machine could prove to be very useful in remote or under-equipped areas like army camps or poor countries.
“Regular radiation” such as microwaves, infrared and visible light typically doesn’t have the energy needed to break chemical bonds, so we may sit out in the sun and get bombarded with a thousand watts and feel no ill effects. Once we reach ultraviolet though, this radiation now has enough energy to break those chemical bonds –including the ones in our bodies. This means that high energy radiation such as that emitted from an x-ray tube can damage DNA, and in high enough doses may even cause radiation sickness.
Invented in 1913 by William D. Coolidge, the Coolidge tube is the most popular method of generating x-rays. Essentially it is a thermionic diode, but optimized for high voltages and high powers. Like a thermionic diode a Coolidge tube is a vacuum tube evacuated to the hardest vacuum reasonable, and also like a thermionic diode it has a heater and an anode.
After a no longer recent hackaday post about DIY capacitors I felt compelled to write this. Sure making a cap out of paper is fun and all, but making a high voltage one is even more fun!
Ladies and gentlemen of the world, I present to you a marvelous device that will revitalize your health and bring wondrous wealth and prosperity to your families and all future generations. Straight from Nikolai Tesla’s labs I bring you a fantastic revelation in high voltage transformer technology, made with nothing but the latest and greatest materials this magnificent transformer will supply all the milliamperes you’ll ever need along with more than nine thousand volts! Such mind boggling wonders can be experienced with this remarkable transformer…
Before small cockroft walton multipliers became inexpensive x-ray machines used to use large iron transformers. These things are the highest voltage transformers you’ll likely ever come across, turning 120V (or 240V in euroland) into 50,000V, 75,000V, 100,000V or even 320,000V. Needless to say these things are awesome.
Transformers are not the only way to boost voltage; another method to the madness is a Cockroft Walton multiplier, also known as the Villrad Cascade depending on your favorite dead scientist. CWs are used to turn high voltage into very high voltage, a task in where a transformer would not be suitable. Essentially it does the same job as a transformer boosting voltage while dropping current, but unlike a transformer a CW outputs DC rather than AC.
A CW consists of cascaded stages, with each stage consisting of of 2 ultrafast diodes and 2 high voltage capacitors.
Franklin’s bells were quite a novelty in the late 1700s. Rather simple in its nature, the device consists of nothing more than a pair of bells, one connected to a stake in the ground and the other to a lightning rod. A light, conductive clapper would be put between them and during lightning storms, these bells would ring.