Two-Laser Boron Fusion Lights the Way To Radiation-Free Energy

ananyo writes "Fusion unleashes vast amounts of energy that might one day be used to power giant electrical grids. But the laboratory systems that seem most promising produce radiation in the form of fast-moving neutrons, and these present a health hazard that requires heavy shielding and even degrades the walls of the fusion reactor. Physicists have now produced fusion at an accelerated rate in the laboratory without generating harmful neutrons (abstract). A team led by Christine Labaune, research director of the CNRS Laboratory for the Use of Intense Lasers at the Ecole Polytechnique in Palaiseau, France, used a two-laser system to fuse protons and boron-11 nuclei. One laser created a short-lived plasma, or highly ionized gas of boron nuclei, by heating boron atoms; the other laser generated a beam of protons that smashed into the boron nuclei, releasing slow-moving helium particles but no neutrons. Previous laser experiments that generated boron fusion aimed the laser at a boron target to initiate the reaction. In the new experiment, the laser-generated proton beam produces a tenfold increase of boron fusion because protons and boron nuclei are instead collided together directly."

Comments

Proton-Boron Fusion is what Bussard was working on

[syukton]

Robert Bussard's fusion project at Energy Matter Conversion Corporation was aimed at investigating Proton-Boron fusion, because it is clean and produces no high-energy neutrons. I was really hoping this was a follow-on to that work. The device Bussard called a Polywell actually shows some serious potential to revolutionize nuclear power globally. It even shows enough promise that the US Navy has been funding some small-scale experiments. It's unfortunate that Bussard died before he could see the potential of the Polywell realized, but it would be nice to see it succeed none the less.

Re:Hooray for fusion!

[bdwebb]

Another poster above you mentioned that 80% of extracted Boron is B-11 so ~1,000 years worth is more accurate if all the Boron in the Turkey mines were used for energy generation only...nevertheless, your post shows exactly why this technology is pretty enticing. B-11 is much, much easier to obtain than U-235 and, if the technology doesn't go the way of vapor, has the potential to change everything. Looking at this article, it appears that your estimate may be a bit off, though, regarding Turkey's Boron reserves:

Although having 72 percent of the world's known boron reserves and being the biggest producer of boron in the world, Turkey has no monopoly on the global boron market. Total boron reserves in the world amount to as much as 4 billion tons. But the amount of boron minerals used as chemicals in industry is no more than 4 million tons a year. This means boron reserves, even when excluding Turkey's supply, are adequate to provide the world with enough boron minerals for almost 300 years.

Going a step further, it looks like Turkey's deposits account for at least 2.88 billion tons of the total 4 billion tons in reserves around the world...definitely enough to keep us running for a while. Considering that we're already using 4 million tons a year for other industry and accounting for future growth (let's throw a random number at it and say 150% for a total of 10 million tons a year), then adding the current power requirements of the world, we get 10.0008 million tons a year of usage. Even using those numbers (and the 80% extraction rate), we're at 319.97 years of boron resources left.

And shitballs...looking at Eti Maden's site, I just found the following that makes me wonder about my previous source:

In the world, Turkey, USA and Russia have the important boron mines. In terms of total reserve basis, Turkey has a share of %72.20, the other important country USA is %6.8.
Total world boron reserves on the basis of B2O3 content are 369 million tons proven. 807 million tones probable and possible, as a total of 1,176 million tons. With a share of %72.20, Turkey has a total boron reserves of 851 million tons on the basis of B2O3 content .

I don't know if the first article is believable or not so I'll just say that we have between 94.07 and 319.97 years of power and industry in Boron...which isn't amazing but it isn't bad either.