Figure 3: Electron and laser propagation in a laser-plasma undulator.
From: An ultracompact X-ray source based on a laser-plasma undulator
(a) Electron trajectories in the undulator, obtained from a 2D PIC simulation. The colour scale indicates the electron density. Propagation and transverse distances are measured in millimetres and micrometres, respectively, and the white markers indicate the positions of the wires. (b) Magnified view of the central part of a. (c) Distribution of the undulator parameter K, calculated from individual trajectories. (d) Evolution of the total emitted energy (green curve), and the total laser energy in the PIC simulation (blue curve) compared with our model Ilas(x)∝exp(−x/lloss) with lloss=0.2 mm (red dashed line).
