Generating Megatesla Magnetic Fields on Earth Using Intense-Laser-Driven Microtube Implosions

Microtube Implosion

Illustration of a microtube implosion. Prior to irradiating with ultraintense laser pulses, a uniform external magnetic field is pre-seeded. Credit: M. Murakami

A team of researchers led by Osaka University discovers “microtube implosion,” a novel mechanism that demonstrates the generation of megatesla-order magnetic fields.

Magnetic fields are used in various areas of modern physics and engineering, with practical applications ranging from doorbells to maglev trains. Since Nikola Tesla’s discoveries in the 19th century, researchers have strived to realize strong magnetic fields in laboratories for fundamental studies and diverse applications, but the magnetic strength of familiar examples are relatively weak. Geomagnetism is 0.3−0.5 gauss (G) and magnetic tomography (MRI) used in hospitals is about 1 tesla (T = 104 G). By contrast, future magnetic fusion and maglev trains will require magnetic fields on the kilotesla (kT = 107 G) order. To date, the highest magnetic fields experimentally observed are on the kT order.

Recently, scientists at Osaka University discovered a novel mechanism called a “microtube implosion,” and demonstrated the generation of megatesla (MT = 1010G) order magnetic fields via particle simulations using a supercomputer. Astonishingly, this is three orders of magnitude higher than what has ever been achieved in a laboratory. Such high magnetic fields are expected only in celestial bodies like neutron stars and black holes.

Principle of Microtube Implosion

(Left) Top view of plasma dynamics in the microtube. Laser-produced hot electrons drive the expansion of the inner-wall plasma into a vacuum. The microtubes are infinitesimally twisted by a pre-seeded magnetic field B0. (Right) An ultrahigh magnetic field is generated at the center due to the ultrahigh spin currents collectively formed by relativistic electrons and ions. Credit: M. Murakami

Irradiating a tiny plastic microtube one-tenth the thickness of a human hair by ultraintense laser pulses produces hot electrons with temperatures of tens of billion of degrees. These hot electrons, along with cold ions, expand into the microtube cavity at velocities approaching the speed of light. Pre-seeding with a kT-order magnetic field causes the imploding charged particles infinitesimally twisted due to Lorenz force. Such a unique cylindrical flow collectively produces unprecedentedly high spin currents of about 1015 ampere/cm2 on the target axis and consequently, generates ultrahigh magnetic fields on the MT order.

The study conducted by Masakatsu Murakami and colleagues has confirmed that current laser technology can realize MT-order magnetic fields based on the concept. The present concept for generating MT-order magnetic fields will lead to pioneering fundamental research in numerous areas, including materials science, quantum electrodynamics (QED), and astrophysics, as well as other cutting-edge practical applications.

Reference: “Generation of megatesla magnetic fields by intense-laser-driven microtube implosions” by M. Murakami, J. J. Honrubia, K. Weichman, A. V. Arefiev and S. V. Bulanov, 6 October 2020, Scientific Reports.
DOI: 10.1038/s41598-020-73581-4

5 Comments on "Generating Megatesla Magnetic Fields on Earth Using Intense-Laser-Driven Microtube Implosions"

  1. Neither ‘energy ‘ nor ‘charge ‘ have ever existed: what are these scientists doing then. Inform them of the physics updates they are unaware of: The Final Theory: Rethinking Our Scientific Legacy, Mark McCutcheon.

  2. I’m sorry but you can’t just through away 400 plus years of science because some guy thinks he’s got it all figured out. He’d all ready be bigger than einstein,if there was any merit to it,as that book has been out for 16 years now. Science is as complicated as it is because it has to be not because “scientists don’t know what they’re doing”.

  3. Yeah David A. If your battery needs a charge in the winter, are u gonna say it doesn’t need to be jumped? Lol. Energy is neither created nor destroyed, merely transformed in Relativity. Ultimately though, there is Nothingness. Did you realize your true nature to that nondual degree?

  4. Scientists have assured that the incredibly large magnets of the LHC and it’s bigger brother are safe. Has anyone actually monitored or even looked for an effect since activation? The idea of black hole (not a real think per Stephen Hawking himself) sized magnetism here on earth is beyond terrifying. We need to stop poking particles with sticks and think before we take idea to action

  5. Shepard Sprague | October 13, 2020 at 12:08 pm | Reply

    You can’t call it that. Prove, Implosion bitch.

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