Bright High-Harmonic Generation through Coherent Synchrotron Emission Based on the Polarization Gating Scheme

Figure 2

(a) Evolution of the ellipticity in polarization gating with different relative time delays. (b) Electron density (n_e) right before the generation of the most intense attosecond pulse. PIC simulation parameters: a = 10, time delay T_d = 16 fs, and Ls = 0.2 λ_L. (c) Obtained radiation pulse intensity by applying a spectral filter to select the 30^th to 100^th harmonic orders. PIC simulation parameters: a = 10, time delay T_d = 12 fs, and Ls = 0.1 λ_L. (d, g, j) Dependence of the shortest width and number density of the electron bunch on the preplasma scale length, time delay, and laser intensity. (e, h, k) Dependence of efficiency of harmonic generation on preplasma scale length, time delay, and laser intensity. (f, i, l) The dependence of number and the peak intensity of gated attosecond pulses (30th–100th) on the preplasma scale length, time delay, and laser intensity. Simulation parameters (d, e, f) a = 10, time delay T_d = 6 fs; (g, h, i) a = 10, Ls = 0.1 λ_L; (j, k, l) time delay T_d = 6 fs, Ls = 0.1 λ_L.

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