Figure 4
From: Stable femtosecond X-rays with tunable polarization from a laser-driven accelerator
Laser polarization dependence: (a–d) show the experimental betatron X-ray beam profiles obtained for four orientations of the laser polarization. The yellow line indicates the laser polarization axis. The red line in the figure represents the FWHM contour of the beam profile obtained from the test particle simulation. (e) X-ray signal reflected from an ADP (101) crystal for s- and p-polarization of the laser driver. Circles represent single shots, while the dashed lines represent the average signal for s-polarization (blue) and p-polarization (red).
