A tiny gold-plated cylinder called a hohlraum holds the deuterium-tritium fuel capsule in the National Ignition Facility target chamber, where the energy from 192 high-powered lasers is converted to thermal X-rays. The X-rays heat and ablate the plastic surface of the ignition capsule, causing a rocket-like pressure on the capsule and forcing it to implode and ignite.
Researchers at Lawrence Livermore National Laboratory (LLNL) have successfully conducted an important round of successful laser experiments at the National Ignition Facility (NIF), validating key computer simulations and theoretical projections relevant to the plasma and X-ray environment necessary to achieve ignition.
NIF, which is more than 80 percent complete, is a 10-story building in which 192 laser beams are focused on a tiny target inside a 30-foot diameter aluminum-lined chamber. Eight beams already have been commissioned. When fully operational (currently scheduled for mid-2009), NIF will be used to study and achieve ignition, resulting in a brief burst of energy that is greater than was used in its creation. Ignition is a long-sought achievement that has never occurred under controlled conditions in a laboratory setting.
The series of experiments is described in a Nov. 18 Physical Review Letters article, whose lead author was the Lab’s Eduard Dewald.
Bob Hirschfeld | EurekAlert!
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There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
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So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
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