Time-resolved resonant absorption study of 532-nm laser-generated plumes over YBa2Cu3O7 targets

Nai Ho CHEUNG*, Q. Y. Ying, J. P. Zheng, H. S. Kwok

*Corresponding author for this work

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41 Citations (Scopus)


The number densities n(t) of the atomic species produced by pulsed-laser (532-nm) interaction with YBaCuO targets were measured using time-resolved resonant absorption spectroscopy. At ∼5 J/cm2 fluence and 0.8 mm above the target, the peak n(t) ranged from 1013 to 1015 cm-3. The distributions of the normal z-velocity component could be modeled by Gaussian functions, in agreement with the theory of supersonic nozzle beams and the more recent theory of Knudsen layer formation. Such theoretical fits gave most probable z velocities in the km/s range and Mach numbers as high as 7. Ba-ion z velocities were better fitted by a 4:7 mix of fast (∼3-km/s) and slow (∼2-km/s) components.

Original languageEnglish
Pages (from-to)6349-6354
Number of pages6
JournalJournal of Applied Physics
Issue number9
Publication statusPublished - 1991

Scopus Subject Areas

  • Physics and Astronomy(all)


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