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John Pasley

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Articles

Shaped liquid drops generate MeV temperature electron beams with millijoule class laser - Communications Physics

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By S. Rahul, Debobrata Rajak, John Pasley
| Nature Verified
Abstract MeV temperature electrons are typically generated at laser intensities of 1018 W cm−2. Their generation at non-relativistic intensities (~1016 W cm−2) with high repetition rate lasers is cardinal for the realization of compact, ultra-fast electron sources.
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Laser-driven Nuclear fusion achieves “ignition”: lab gets more energy out than in

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By John Pasley
| Energy Post Verified
Though nuclear fusion serving the grid is surely still decades away, it has got one important step closer, explains John Pasley at the University of York. For the first time, in the U.S. the Lawrence Livermore National Laboratory achieved “ignition” for laser driven fusion. That means more energy was taken out, by a factor of 1.5, than put in. However, the two million Joules of laser light fired at the fuel pellets needed 300 million Joules to create it. So there’s still a long way to go.
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Nuclear fusion: how scientists can turn latest breakthrough into a new clean power source

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By John Pasley
| Positive News Verified
Laser-driven fusion still poses major challenges Laser fusion is a pulsed technology, and a huge hurdle is the so-called laser repetition rate. Energy is released in intense bursts lasting much less than a billionth of a second, which must be repeated a few times every second to produce an average power output comparable to modern fossil-fuel based power stations. The NIF laser by these standards is far too slow. It can be fired only twice a day.
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