8/1/2023 0 Comments Thorium builder workshop![]() Pictured is my high frequency ferrite transformer pair, with a 4-stage multiplier seen behind it. The difficulty is that it is often difficult if not impossible to find an appropriate fully assembled DC supply of this voltage level that is affordable to the amateur scientist. Simply take the output of the 40kv negative supply and attach it to the chamber with a physically large high voltage 50-100k ohm ballast resistor in series (large enough that its length will not flash-over if 40kv is applied to it in a plasma run-away or arc discharge). If you can purchase a power supply (occasionally but not commonly found surplus) appropriate for fusion use, the high voltage becomes very simple. If you've never TIG welded before, it would be wise to have someone with experience do it as the welds must be flawless with no pin-sized holes or porous areas to hold a vacuum.Īfter machining, thoroughly clean the chamber and avoid getting fingerprints in it since these will outgas, which means at vacuum pressure molecules in the oil of finger prints or machining oil will become vapor and make it hard to maintain plasma stability or reach a good ultimate vacuum level. Only weld on the inside, never on the outside (since virtual leaks can be formed if both inside and outside are welded). Conflat can be seen in the image below as the flanges with bolts, and KF (kwik-flange) are seen as those with only clamps holding an o-ring on the mating surface. Flanges are typically either of the KF or the conflat style. Get two stainless steel hemispheres, purchase two corresponding conflat-flanges (8" flanges in my case), bore out holes for accessory flanges, and then TIG weld it all together. Parts can be scrounged for several hundred dollars, or purchased new for $500+. Sometimes an appropriate chamber can be found on eBay, but generally it is best to make one. General engineering tools, a machine shop if at all possible (although 90% of mine was built with nothing but a dremel and cordless drill, the only thing you really can't build without a shop is scratch building the vacuum chamber)Ī quality high vacuum chamber is required for the fusor to operate. A camera and TV display for viewing the inside of the reactor A large ballast resistor in the range of 50-100k and at least a foot long Deuterium gas (can be purchased as a gas or extracted from D2O through electrolysis - it is much easier and more effective to use compressed gas) A Geiger counter, preferably a scintillator type, for x-ray detection and safety A neutron radiation detector, either a proportional He-3 or BF3 tube with counting instrumentation, or a bubble dosimeter ![]() A thermocouple or baratron (of appropriate scale) vacuum gauge A high voltage divider probe for use with a digital multimeter A high voltage supply, preferably capable of at least 40kv 10ma - Must be negative polarity A secondary high vacuum pump, either a turbo pump or oil diffusion pump A roughing vacuum pump capable of reaching at least 75 microns vacuum A vacuum chamber, preferably in a spherical shape All the other inherent dangers of a home engineering project of this degree (a wide gamut of potential injuries, damage to the checking account, and the loss of general sanity) Deuterium, an explosive gas, will be used. Potentially hazardous levels of x-rays will be produced. Make sure you know your high voltage safety or have a qualified electrical advisor. This project includes lethal voltage levels. ![]() Yes, you can build your very own nuclear fusion reactor in your house! But first, a few warnings: ![]()
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