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

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 Al8+. The maximum energies of ions obey the scaling relation E 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.

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Correspondence to I. V. Romanov.

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Original Russian Text © I.V. Romanov, V.L. Paperny, Yu.V. Korobkin, N.G. Kiselev, A.A. Rupasov, A.S. Shikanov, 2013, published in Pis’ma v Zhurnal Tekhnicheskoi Fiziki, 2013, Vol. 39, No. 8, pp. 62–70.

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Romanov, I.V., Paperny, V.L., Korobkin, Y.V. et al. Influence of laser pulse parameters on characteristics of a source of multicharged metal ions based on laser-induced medium-power spark discharge. Tech. Phys. Lett. 39, 388–392 (2013). https://doi.org/10.1134/S1063785013040226

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Keywords

  • Laser Pulse
  • Technical Physic Letter
  • Laser Pulse Energy
  • Laser Pulse Duration
  • Laser Power Density