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year 27, Issue 2 (ICOP & ICPET 2021 2021)
ICOP & ICPET _ INPC _ ICOFS 2021, 27(2): 777-780 |
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Dehghani Z, Jafari M J, Khalilzadeh E, Chakhmachi A, Rezaei S. The investigation of the energy distribution function of electrons in field ionizied plasma produced. ICOP & ICPET _ INPC _ ICOFS 2021; 27 (2) :777-780
URL: http://opsi.ir/article-1-2477-en.html
URL: http://opsi.ir/article-1-2477-en.html
The investigation of the energy distribution function of electrons in field ionizied plasma produced
1- Plasma and Fusion Research School, Nuclear Science and Technology Research Institute, AEOI, P.O.BOX: 14395-836, Tehran, Iran
Abstract: (901 Views)
In this paper, the effect of ionization on the energy spectrum of electrons produced in the interaction of a laser with hydrogen atoms is investigated using the PIC simulation code. The results show that at longer rise-time pulses (here 60 and 70 fs), electrons achieve higher energies in the field-ionized plasma than in the case of pre-plasma. In this case, because of density fluctuations in the field-ionized plasma, the Raman backscattered radiations are seeded by a strong initial noise at the earlier times and the Mendonca condition for chaos threshold is met sooner. Therefore, the electrons gain more energy through the stochastic mechanism that is in agreement with chaotic nature of the motion.
Keywords: Electron energy, Interaction between laser and gas, Electron energy distribution function, Field-ionized plasma.
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