Journal of Physical Studies 1(1), 46–51 (1996) DOI: https://doi.org/10.30970/jps.01.46 DYNAMICS OF ION EMISSION AT RESONANT AND UNRESONANT ABSORPTION OF LASER RADIATION BY PLASMA ON THE SOLID SURFASE

I. I. Opachko, L. L. Shimon, B. Ya. Khomyak
Uzhgorod State University,
46 Drugetiv Str., Uzhgorod UA-294000, Ukraine

In the article the dynamics of the ion emission under the action of XeCl eximer laser radiation onto the surface has been studied by the time–of–flight mass–spectrometry method with the time resolution of $\sim$ 50 ns.

While irradiating grafite and aluminium targets (both the bulk and the film ones) for which the process of laser radiation absorption was of unresonant and resonant character the mass–energy spectra of emitted components have been studied. A ‟two–hilled" structure of Al$^{+}$ ion emission conditioned by a resonant character of laser radiation absorption ($λ = 308$ nm) by aluminium vapour as well as ‟two–hilled" structure of C$_{n}^{+}$ conditioned by the shock waves in the grafite target at unresonant absorption have been revealed to be responsible for the formation of compound molecules of C$_{n}$.

The possibility to observe the action of excimer laser onto the surface in the optical range of $λ = 510.6$ nm with the help of quantum luminance amplifier based on the active element of Cu vapour laser with the resolution of $\sim$ 25 ns has been proved by the experiment.

The correlation between the reflecting properties of the interaction region and the dynamics of ion emission has also been revealed.

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