This article originally appeared in the IEEE Spectrum back in March, 2009, but is only now available online:
Building a fusor is simple enough for amateurs to contemplate because
of the enormous global inventory of used lab equipment, says veteran
fusioneer Richard Hull. For example, fusion containers need only
achieve pressures of about one millitorr; vacuum pumps with that
capability make their way to eBay for US $10 to $100. High-voltage
feedthroughs are in the same range—or free, if you build your own from
microwave-oven salvage. The most expensive items, according to
Schatzkin, are neutron detectors, which have to be purchased new. But a
cheap workaround is available, Hull says: You can prove your fusor is
working by irradiating a piece of silver and watching the decay of the
Ag-108 and Ag-110 isotopes with a simple Geiger counter.
Yes, ITER and NIF may be getting all the press (I still haven't heard from NYT's Friedman…), but the real action is taking place in basements and garages. Follow those two links and look at those two facilities. They can't be serious.