Fun with fusion: Freshman's nuclear fusion reactor has USU physics faculty in awe

They set to work. They found a neutron detector in an Idaho Falls scrap metal yard. Craig built a neutron modulator (which slows down the emitted neutrons so they can be detected) out of a few hundred spare CDs. They found a broken turbo molecular pump lying forgotten at Deseret Industries.

Too poor to buy pricey deuterium gas, Craig bought a container of deuterium oxide, or heavy water, for 20 bucks and came up with a way to make it a gas and get rid of the accompanying oxygen by passing it over heated magnesium filings.

Not bad for a backyard amateur who considered himself more mechanic than scientist.

"I teased him that he was now officially a science geek," Allen Wallace said.

One professor Friday stood nervously away from Wallace's reactor — which is notably free from any shielding — but he needn't have worried: Wallace's detector measures 36 neutrons per minute just in background radiation from space, and the device's usual output adds only four neutrons per minute. People in airplanes absorb much more than that.

It took two years of gathering materials and six months of assembly, but the final product actually, incongruously, works.

"(This was) the day I achieved a Poisser plasma reaction," Wallace wrote next to a picture of the glowing ball. "Probably the coolest thing I have ever seen."

Others thought it was cool, too. Wallace began winning contests — local, state, national — culminating in second place in the International Intel Science and Engineering Fair last May in Cleveland. He's now beginning work on a USU physics degree.

"The whole thing combines chemistry, engineering, physics," he said. "Put them all together and you come out with something pretty sweet."

Farnsworth would have been proud.

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