Fig. 1. Experimental setup of efficient extreme-ultraviolet continuum from carbon nanotube foams

Fig. 2. Extreme-ultraviolet radiation signals of carbon nanotube foam target and collapsed high-density carbon nanotube target. (a) Raw spectral signal from 60-μm-thick carbon nanotube foam target; (b) raw spectral signal from collapsed high-density carbon nanotube target; (c) comparison of spectral signals, signal from collapsed carbon nanotube target is 10-fold enhanced

Fig. 3. Efficiency curves of flat-field grating and X-ray CCD

Fig. 4. Extreme-ultraviolet radiation spectra of carbon nanotube foam target and diamond-like carbon target. (a) Raw spectral signal from 40-μm-thick carbon nanotube foam target after 200-nm-thick Al filter; (b) raw spectral signal from 50-nm-thick diamond-like carbon target; (c) comparison of quantitative spectral intensities obtained by inverse solution, signal from diamond-like carbon target is 10-fold enhanced

Fig. 5. Measured results of photodiode. (a) Responsivity curve of photodiode; (b) measured results from carbon nanotube foam targets with varied thicknesses at different directions

Fig. 6. PIC simulation results. (a) Comparison of laser absorptions; (b) strong magnetic channel formed in carbon nanotube foam target along laser propagation direction; (c) typical trajectories of electrons of diamond-like carbon targets wiggled by magnetic field in channel; (d) comparison of extreme-ultraviolet radiation intensity between simulation and experiment

Fig. 7. Results of atomic radiation. (a) Transverse average electron temperature distribution at simulation time of 530 fs; (b) typical radiation power spectra at electron temperatures of 50 eV and 350 eV