| Autor: |
I V Romanov, A A Rupasov, A S Shikanov, V L Paperny, A Moorti, R K Bhat, P A Naik, P D Gupta |
| Předmět: |
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| Zdroj: |
Journal of Physics D: Applied Physics; Nov2010, Vol. 43 Issue 46, p465202-465202, 1p |
| Abstrakt: |
The results of experimental studies of ion beams escaping from both a laser-produced plasma and a plasma of laser-induced vacuum discharge are presented. The parameters of the discharge with an Al cathode are as follows: current amplitude is about 1.7 kA and current rise rate is about 7.5 x 109 A s[?]1 as the capacitor voltage is 2.3 kV. The discharge is initiated with a laser pulse of 30 ps length, energy less than 10 mJ and power density IL = 5 x 1011 W cm[?]2. It is shown that the discharge is a source of accelerated and highly charged ions of the cathode material. The production of Al ions is observed at the instant when the discharge current rise rate attains a peak value and just at that same instant a pinching occurs in front of the cathode jet expanding into the interelectrode gap. Ion energy distributions are characterized by the presence of a significant non-Maxwellian tail of the accelerated ions. The maximum ion charge state and energy per charge unit are +8 and 13 keV/Z, respectively. The energy is comparable to the value observed under similar experimental conditions for the laser-produced plasma at a pulse energy of 400 mJ and power density IL = 2 x 1013 W cm[?]2. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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