Science Advances

Supplementary Materials

This PDF file includes:

  • section S1. Role of filamentation
  • section S2. Focal position scan
  • section S3. Harmonic flux
  • section S4. Oxygen K-edge XANES
  • section S5. Spectral phase interferometry of plasma density
  • section S6. Thirty-centimeter focusing results
  • section S7. Spatial wavefront characterization
  • section S8. Simulation methods
  • section S9. Harmonic buildup
  • section S10. Overdriven limit
  • fig. S1. Gas flow from thin needle target.
  • fig. S2. Harmonic focal scans.
  • fig. S3. Oxygen K-edge spectroscopy.
  • fig. S4. Spectral interferometer for plasma characterization.
  • fig. S5. Plasma-induced phase shifts.
  • fig. S6. Linear-scale plasma phase shift in neon (red) and helium (blue).
  • fig. S7. Harmonics generated with looser focusing.
  • fig. S8. Buildup of harmonic flux.
  • fig. S9. Buildup of harmonic flux.
  • table S1. Harmonic flux in the water window.
  • References (41–54)

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