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Scientists discovered a novel particle acceleration mechanism

Could a particle accelerator using laser-driven implosion become a reality?

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During the late of 1980’s, laser pulse compression technology has been invented that later help to develop power short-pulse laser techniques. The technique enhances the intensity of the laser.

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Now, scientists at the Osaka University have discovered an astonishing physical phenomenon. They have discovered a novel particle acceleration mechanism called ‘Micro-bubble implosion,’ in which super-high energy hydrogen particles (relativistic protons) are discharged right when bubbles shrink to atomic size through the irradiation of hydrides with micron-sized spherical bubbles by ultraintense laser beats.

In this phenomenon, when shrinking matter to the unprecedented high level, with density comparable to matter the size of a sugar cube weighing more than 100 kg, high-energy protons are emitted from the positively-charged nanoscale clusters. A unique ion motion in which ions (charged particles) converge to a single point in space at half the speed of light plays a crucial role.

As it is a compact source of neutron radiation through nuclear fusion, this concept will be utilized in a variety of applications in medical treatment and industry in the future, such as proton radiotherapy to treat cancer, the development of new energy with laser nuclear fusion, cross-sectional photos for developing fuel cells, and development of new substances.

Scientists noted, “This phenomenon, which looks like the opposite of the Big Bang, is essentially different from any previously discovered or proposed acceleration principles. It will clarify unknown space physics of grand scales of time and space, such as the origins of high-energy protons moving about in stars and space.”

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Their research results were published in Scientific Reports.

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