This article is cited in 11 papers

Influence of laser pulse parameters on characteristics of a source of multicharged metal ions based on laser-induced medium-power spark discharge

I. V. Romanov^ab, V. L. Paperny^ab, Yu. V. Korobkin^ab, N. G. Kiselev^ab, A. A. Rupasov^ab, A. S. Shikanov<sup>ab

a</sup> P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow
^b Irkutsk State University

Abstract: The dynamics of laser-induced vacuum spark discharge with storage energy not exceeding 25 J has been studied in a broad range of laser pulse energies and power densities. It is shown that, using discharge-initiating laser pulse of nanosecond duration, it is possible to obtain stable single pinching of cathode jet plasma at a storage voltage above 10 kV. Plasma pinching is accompanied by the generation of a beam of multicharged ions of the cathode material (aluminum) up to Al$^{8+}$. The maximum energies of ions obey the scaling relation $E_{\mathrm{max}} = 5ZeU_0$ that has been obtained previously for a low-voltage discharge. An increase in the laser pulse energy leads to growth of the average beam charge and a sharp decrease in the ion energy.

Received: 14.12.2012

 English version: Technical Physics Letters, 2013, 39:4, 388–392

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