Simultaneous measurements of current and magnetic field in laser-produced plasmas

Abstract
The current I and the magnetic field B generated during the interaction of focused laser pulses (10.6 μm, 4 J, 1.7 ns or 1.06 μm, 4 J, 20 ns) on a copper target were measured simultaneously as a function of the background pressure in air, N2, He,Ar, and CO2, the results show that I and B are connected, and in addition provide experimental evidence for the diffusion of the magnetic field in laser‐produced plasmas.