Analytical and numerical investigation of the effect of pulse shape of intense, few-cycles TM₀₁ laser on the acceleration of charged particles

251-256The effect of the pulse-shape, carrier-envelope phase (CEP) and number of cycles of the ultra-intense, ultra-short few-cycles TM01 laser propagating in vacuum on the acceleration of the electrons has been analytically and numerically investigated. The Gaussian, Lorentzian, and hyperbolic-secant temporal profiles of the laser pulse have been considered to get an insight into the scheme of acceleration of charged particles. A laser of intensity ~1022 W/cm2 is found to accelerate the on-axis electrons from rest to the GeV energy range. The numerical results show that a single cycle Lorentzian profile of the laser pulse may mainly be used to obtain the higher values of possible electron acceleration

Effect of temporal profile of the laser pulse interacting with solid surface on the generation of high harmonics and attosecond pulse trains

479-487The effect of temporal profile of an ultra-intense, ultrashort few-cycle laser pulse incident normally on a solid surface on harmonics generation (HHG) and attosecond pulse trains has numerically been studied. The results of transformation of initially narrow spectrum of the laser pulse into a broad harmonic spectrum are obtained. The reflected signal has the form of a train of ultrashort pulses of duration ~100 attoseconds for the case of a Ti:sapphire laser. The effect of collisions on electron dynamics has been taken into account

Effect of laser-pulse-shape on the transference of laser energy into the energy of fast ions in radiation pressure dominant regime

785-789<span style="font-size:10.0pt;font-family: " times="" new="" roman","serif";mso-fareast-font-family:"times="" roman";mso-bidi-font-family:="" mangal;mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:="" hi"="" lang="EN-US">The effect of laser-pulse temporal-profile on the transference of laser energy into the energy of fast ions when the radiation pressure is dominant, has been studied. The laser temporal profiles considered are Lorentzian, hyperbolic secant, and Gaussian. The numerical results are compared for different temporal profile of the laser pulse. It is found that the Lorenztian pulse is more effective to impart kinetic energy to the ions in comparison to Gaussian or hyperbolic secant laser pulse.</span