Posts from the ‘MIT’ Category

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Record-Breaking Laser Hits 500 Trillion Watts

Laser physicists at the Lawrence Livermore National Laboratory have broken the record for the highest-power laser shot with a collection of beams delivering more than 500 trillion watts of peak power.

The National Ignition Facility fired 192 beams at the same time, delivering 1.85 megajoules of ultraviolet laser light to a target a mere two millimeters in diameter.

To put those numbers into perspective, the 500 terawatt figure is 12,500 times greater than the demand for electricity in 2006 in Britain, which averaged out at 40 gigawatts.

“For scientists across the nation and the world who, like ourselves, are actively pursuing fundamental science under extreme conditions and the goal of laboratory fusion ignition, this is a remarkable and exciting achievement,” said Richard Petrasso, senior research scientist and division head of high energy density physics at the Massachusetts Institute of Technology in a press release. “The 500 TW shot is an extraordinary accomplishment by the NIF Team, creating unprecedented conditions in the laboratory that hitherto only existed deep in stellar interiors,”

Made entirely of carbon and stable in open air, the transparent layer of carbon nanotubes and buckyballs can pick up infrared light, in addition to letting visible light through to conventional cells below. Although efficiency is only about .1%, it is expected to increase quickly. Because carbon is so cheap, the cost should be relatively low and therefore can go into use with a low efficiency. Every bit helps! Hopefully this can push solar energy to become a more powerful alternative.

MIT researchers develop working prototype of infrared-absorbing solar cells