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Investigation of the Attosecond X-Ray Spectrum Driven with Laser-plasma Interaction in Relativistic Oscillating Surface Model

Roustaie, Moslem | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 49071 (04)
  4. University: Sharif University of Technology
  5. Department: Physics
  6. Advisor(s): Sadighi Bonabi, Rasoul
  7. Abstract:
  8. With the invention of the Chirped Pulse Amplification (CPA) technique in 1985, it became possible to amplify ultra-short laser pulses to high intensities with suitable pre-pulses contrast. By considering the importance of the short wavelengths radiation sources, the interaction of the intense laser with dense plasma is one of the most promising routs to reach this goal.This thesis is devoted to theoretical studies of the interaction of intense laser pulses with solid-state targets. The Relativistically Oscillating Mirror (ROM) models, which introduced in 2006, is presented and discussed. The reflection of a laser pulse from an overdense plasma surface as the oscillating mirror, to the speed of light, could generate coherent X-ray pulses with accompanying temporal compression by a factor of 4γ2, where γ is the Lorentz factor of the mirror surface.In the second part of the thesis, the effects of the different parameters of the laser and plasma on the generated spectra in ROM model are studied. Due to the characteristics of incident pulse, the equations for this model have been analytically calculated, which is a key step toward improving the model and to generalize the model equations. Generation of high order harmonics in the reflected pulse from the surface of overdense plasma on the solid target makes possible to achieve optimum attosecond temporal duration by using proper frequency filters. In this study, by investigation of effects of several ultra-thin foil filters in XUV and X-ray domain, attosecond pulse with 124 eV photon energy can be produced
  9. Keywords:
  10. Overdense Plasma ; Oscillating Mirror ; Laser Radiation ; Ligh Intensity Laser Pulse ; X-Ray Spectrum ; Doppler Shift

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