Ultrafast x-ray pulse generation by focusing femtosecond infrared laser pulses onto aqueous solutions of alkali metal chloride

Koji Hatanaka, Toshifumi Miura, Hiroshi Fukumura

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

X-ray pulses were generated by focusing femtosecond infrared laser pulses (775 nm, 130 fs, 0.58 mJ/pulse) onto an alkali metal (Cs or Rb) chloride aqueous solution jet. The mechanism of x-ray pulse generation was studied by measuring x-ray emission spectra and transmitted laser pulse spectra. Addition of CsCl to distilled water was found to enhance markedly x-ray intensity and x-ray cutoff energy. The frequency-up-shift observed in transmitted laser pulses was larger in CsCl solution than in distilled water. The results suggested that a high-density plasma-like medium was produced in CsCl solution due to secondary electrons.

Original languageEnglish
Pages (from-to)3925-3927
Number of pages3
JournalApplied Physics Letters
Volume80
Issue number21
DOIs
Publication statusPublished - 2002 May 27

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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