Experimental setup. The inset image is a frame of a spatial-resolved soft x-ray spectrum.
Time integrated soft x-ray spectra at a range of 3–25 nm of argon cluster at an intensity of with a 150 fs pulse width at the backing pressures of 2 (a), 4 (b), and 6 MPa (c), respectively. The signs of the second and second mean that the second order diffraction lines.
Time integrated soft x-ray spectra at an intensity of with a 150 fs pulse width at the backing pressure of 4 MPa using the circular polarization laser (a) and linear polarization (b) laser, respectively.
Angular distribution of hot electrons generated at the intensity of with a duration of 150 fs under the backing pressure of 5 MPa.
The laser absorption efficiency and the relative x-ray yield (3–40 nm) under different backing pressures. The integrated x-ray yield is normalized by the maximum value at the pressure of 6 MPa.
The calculated cluster radius and the number of atoms under different backing pressures.
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