Fig. 4: Spatiotemporal evolution of the magnetic field under different preplasma densities.
From: Observation of sub-relativistic collisionless shock generation and breakout dynamics
Spatiotemporal evolution of the magnetic field in front of the target when the preplasma density npre is (a) npre = 0.4nc; (b) npre = 0.2nc, τd is the time delay; The target surface is located at x = 0 which is indicated by an arrow in each picture.
