Micro-radiography with laser plasma X-ray source operating in air atmosphere

S. A. Pikuz, O. V. Chefonov, S. V. Gasilov, P. S. Komarov, A. V. Ovchinnikov, I. Yu Skobelev, S. Yu Ashitkov, M. V. Agranat, A. Zigler, A. Ya Faenov

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

K-shell emission from copper target was observed by focusing femtosecond laser pulses very close to the target surface-air interface. It was shown that mechanism of X-ray emission is connected with generation of fast electrons in the air plasma area. Experiments demonstrated that moderate intensity of laser radiation (IL<1015W/cm2) was enough to produce considerable flux of X-ray photons of at least 10keV energy. The parameters of generated X-ray emission were studied. It was found that after propagation through 40cm thick air layer X-ray spectra consisted of pronounced Kα and Kβ characteristic lines and relatively small Bremsstrahlung continuum. Since transversal source size has an order of a few tens of micrometers, such a source can be used for absorption imaging of micro-objects in standard laboratory conditions. That can be particularly important for diagnostic of medical and biological samples in vivo.

Original languageEnglish
Pages (from-to)393-397
Number of pages5
JournalLaser and Particle Beams
Volume28
Issue number3
DOIs
StatePublished - Sep 2010

Keywords

  • Laser-produced plasma
  • Micro-radiography

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