More info at NextBigFuture: http://nextbigfuture.com/2011/07/fusion-energy-without-radioactivity.html#more
It’s not just a thruster, they think they can generate net power with it.
For a practical system they need a pretty high-power laser that fires at 75MHz. It doesn’t exist yet, but according to Talk-Polywell folks there are commercially-available lasers that meet the specs, except they only fire at around 10kHz. That ought to do for “scientific feasibility,” I’d think. Lasers are advancing pretty quickly, too.
One thing that’s interesting is that according to their analysis, boron fusion isn’t much harder than DT fusion in this configuration.
