Sunday, October 19, 2014

bashing lockheed martin's purported fusion breakthrough


BI |  Researchers at Lockheed Martin Corp.'s Skunk Works, announced on Wednesday their ongoing work on a new technology that could bring about functional nuclear reactors powered by fusion in the next 10 years.

But most scientists and science communicators we talked to are skeptical of the claim.
"The nuclear engineering clearly fails to be cost effective," Tom Jarboe told Business Insider in an email. Jarboe is a professor of aeronautics and astronautics, an adjunct professor in physics, and a researcher with the University of Washington's nuclear fusion experiment.

The premise behind Lockheed's 10-year plan is the smaller size of their device. The scientists are designing an improved version of a compact fusion reactor. The CFR generates power from nuclear fusion by extracting energy through the extremely hot plasma contained inside it.

The plasma consists of hydrogen atoms that, when heated to billions of degrees, fuse together. When this happens they release energy, which the CFR then extracts and can eventually transfer into electricity.

Traditional containment vessels for these plasmas are called tokamaks, and they look like hollowed-out doughnuts and are the size of an average apartment. Lockheed says its new CFR can generate 10 times more power than a tokamak in a space that could fit on the back of a large truck, according to Aviation Week. But Jarboe disagrees.

"This design has two doughnuts and a shell so it will be more than four times as bad as a tokamak," Jarboe said, adding that, "Our concept [at the University of Washington] has no coils surrounded by plasma and solves the problem."

Although Lockheed Martin issued a press release saying it had several pending patents for its approach, the company has yet to publish any scientific papers on this latest work.

"It's really great that Lockheed has taken an interest in this important challenge of providing carbon-free energy to the world," Michael Zarnstorff, deputy director for research at the Princeton Plasma Physics Laboratory, told Business Insider in an email. "We haven't seen any results from the Lockheed experiments but the design is an interesting concept and it looks like they are at a very early stage of exploring this configuration."