Extended Data Fig. 5: Quadratic dependence of the narrowband coherent undulator radiation generated from microbunching on the bunch charge.
From: Experimental demonstration of the mechanism of steady-state microbunching
a, Results corresponding to individual laser shots; the shading (light red and grey) represents 3σ of the detection noise. b, The result after 200-consecutive-laser-shot averaging; the plot is the same as Fig. 3 and is presented again here for comparison with a and with the incoherent signal in Extended Data Fig. 4. The blue dots represent the experimental data and the red curves are quadratic fits.
