Figure 2
From: Transverse oscillating bubble enhanced laser-driven betatron X-ray radiation generation
Measured X-ray Spectra. (a) Spectral intensity extracted from the filter transmission for a flat-top 4 mm jet (red, dashed), a flat-top 6 mm jet (green, dotted) and the “M”-shaped jet for an interaction distance above the nozzle of \(y_1=1\,\mathrm {mm}\) (blue, solid) and \(y_2=2\,\mathrm {mm}\) (cyan, dash-dotted) for single shots. (b) A five-shot average. The fit parameters for the five-shot average are given in Table 1. The colored shades represent the confidence bands obtained through a statistical analysis of a large set of Monte-Carlo (MC) simulations. The confidence bands for the single shots indicate a point-wise one-sigma band of bootstrapped datasets. The confidence band for the averaged shots are obtained by uncertainty propagation using the individual shot uncertainties (see Methods section). The spectral observation range is limited to 2.7–30 keV (indicated through vertical gray shades) due to filter transmission and the quantum efficiency of the CCD camera.
