For fusion research.
Try one of theseFarnsworth fusor
Well that certainly beats the hell out of putting a quartered grape in the microwave, doesn't it?
Whoa. That is really amazing! I especially like the photo at the end of the article. You won't reach break-even (or close) with this design, as there are just too many instabilities, but it's an outstanding research device.
Read on about Bussard's innovation, I wonder how that's going ? Steve
P.S. If the original author doesn't mark this Best Answer, I will.
Could you do it with a high voltage transformer and a spark gap? If not, the farnsworth fusor is probably what you're looking for.