Cover Picture: Contrib. Plasma Phys. 10/2019

Contour plots showing the field amplitude for a negatively chirped, un‐chirped, and positively chirped pulse after propagating a certain distance in an underdense plasma. Note that all the subfigures have the same scale for the transverse and longitudinal axes as that shown for the bottom four subfigures. Fig. 1 of the paper by Gang Li et al.