Abstract
A microtube implosion driven by ultraintense laser pulses is used to produce ultrahigh magnetic fields. Due to the laser-produced hot electrons with energies of mega-electron volts, cold ions in the inner wall surface implode towards the central axis. By pre-seeding uniform magnetic fields on the kilotesla order, the Lorenz force induces the Larmor gyromotion of the imploding ions and electrons. Due to the resultant collective motion of relativistic charged particles around the central axis, strong spin current densities of sim peta-ampere/hbox {cm}^{2} are produced with a few tens of nm size, generating megatesla-order magnetic fields. The underlying physics and important scaling are revealed by particle simulations and a simple analytical model. The concept holds promise to open new frontiers in many branches of fundamental physics and applications in terms of ultrahigh magnetic fields.
Highlights
A microtube implosion driven by ultraintense laser pulses is used to produce ultrahigh magnetic fields
Using a ns-long laser, such a seed field quickly rises on the sub-ns time scale and diffuses into the microtube implosion (MTI) target nearly simultaneously, and slowly decays on time scales 10 ns, which are characterized by impedance of the capacitor-coil
We perform proof-of-principle EPOCH simulations to demonstrate that strong magnetic fields can still be produced, when the uniform hot electron population previously assumed by the M–J distribution is replaced with a realistic laser-plasma interaction[45]
Summary
A microtube implosion driven by ultraintense laser pulses is used to produce ultrahigh magnetic fields. The currents from the ions and electrons work together to generate MT-order magnetic field Bc at the center.
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