Articles written in Pramana – Journal of Physics

    • Energy of electrons at the interaction of femtosecond laser with argon nanocluster


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      The interaction of intense femtosecond laser pulses with argon nanoclusters is studied using nanoplasma model. Based on the dynamic simulations, ionisation process, heating, and expansion of an argon nanocluster irradiated by an intense femtosecond laser pulse are investigated. The analytical calculation provides ionisation ratefor different mechanisms and time evolution of hydrodynamic pressure for various pulse shapes. In this work, the dependence of laser intensity, initial ion density and pulse shape on the electron pressure, the density of electrons and electron temperature are presented. It is noticed that the negative and positive chirped pulses and initial iondensity implement some modifications on the current calculation models. It is found that reducing the initial ion density at a laser intensity of about $1\times10^{16}W/hboxcm^{2}$ increases the energy of electrons. By applying a positive chirp laser pulse during interaction with nanoclusters, both electron density and ultimately electron pressure are improved by about 22%.

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