Laser-Pulse Shaping in the Interaction of Ultra-Intense Laser Pulses with Ultra-Thin Foils

A comparison is made between the interaction of electron bunches and intense laser pulses with plasma. The laser pulse is modelled with photon kinetic theory , i.e. a representation of the electromagnetic field in terms of classical quasi-particles with space and wave number coordinates, which enables a direct comparison with the phase space evolution of the electron bunch. Analytical results are presented of the plasma waves excited by a propagating electron bunch or laser pulse, the motion of electrons or photons in these plasma waves and collective effects, which result from the self-consistent coupling of the particle and plasma wave dynamics.

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Electron heating at the interaction of super-intense laser pulses with thin foils

10.1117/12.675471 ◽

2006 ◽

Author(s):

V. S. Rastunkov ◽

V. P. Krainov

Keyword(s):

Laser Pulses ◽

Intense Laser ◽

Electron Heating ◽

Thin Foils ◽

Intense Laser Pulses

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Tc-99m production with ultrashort intense laser pulses

Laser and Particle Beams ◽

10.1017/s0263034614000615 ◽

2014 ◽

Vol 32 (4) ◽

pp. 605-611 ◽

Cited By ~ 10

Author(s):

V. Yu. Bychenkov ◽

A. V. Brantov ◽

G. Mourou

Keyword(s):

Laser Pulse ◽

Thin Foil ◽

Laser Pulses ◽

High Energy ◽

Intense Laser ◽

Pic Simulation ◽

Intense Laser Pulses ◽

Fs Laser ◽

Proton Generation ◽

Coherent Amplification

AbstractThe interaction of a relativistic short laser pulse with thin foil is studied using 3D PIC simulations in the context of optimized high-energy proton generation for nuclear medicine and pharmacy. As an example, we analyze the Tc-99m yield from the Mo-100(p,2n)Tc-99m reaction with the International Coherent Amplification Network (ICAN) concept defined by a 10 J pulse energy and 10 kHz repetition rate. Based on 3D PIC simulation it has been demonstrated that normally incident 100 fs laser pulse with maximum intensity of 5 × 1021 W/cm2 is able to generate 1011 protons with energy upto 45 MeV from thin semi-transparent CH2 target. Such laser-produced proton beam after 6 hours bombardment of the thick metallic Mo-100 target gives around 300 Gbq activities of Tc-99m isotope. This gives reason to believe that laser technology for producing technetium is possible with ICAN concept to replace the traditional scheme through the fission of weapons-grade uranium.

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Spatial and Temporal Laser Pulse Control Technologies for Applications of Intense Laser Pulses

The Review of Laser Engineering ◽

10.2184/lsj.37.408 ◽

2009 ◽

Vol 37 (6) ◽

pp. 408-419

Author(s):

Akira SUDA ◽

Fumihiko KANNARI

Keyword(s):

Laser Pulse ◽

Laser Pulses ◽

Intense Laser ◽

Pulse Control ◽

Intense Laser Pulses ◽

Control Technologies

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Excitation of muonic molecules ddμ and dtμ by super-intense attosecond soft X-ray laser pulses: Shaped post-laser-pulse muonic oscillations and enhancement of nuclear fusion

International Journal of Modern Physics E ◽

10.1142/s0218301314300148 ◽

2014 ◽

Vol 23 (09) ◽

pp. 1430014 ◽

Cited By ~ 6

Author(s):

André D. Bandrauk ◽

Guennaddi K. Paramonov

Keyword(s):

Laser Pulse ◽

Quantum Dynamics ◽

Power Spectra ◽

Laser Pulses ◽

Molecular Ions ◽

Intense Laser ◽

Muon Catalyzed Fusion ◽

Three Dimensional Model ◽

Intense Laser Pulses ◽

Oppenheimer Approximation

The quantum dynamics of muonic molecular ions ddμ and dtμ excited by linearly polarized along the molecular (z)-axis super-intense laser pulses is studied beyond the Born–Oppenheimer approximation by the numerical solution of the time-dependent Schrödinger equation within a three-dimensional model, including the internuclear distance R and muon coordinates z and ρ. The peak-intensity of the super-intense laser pulses used in our simulations is I0 = 3.51 × 1022 W/cm2 and the wavelength is λl = 5 nm. In both ddμ and dtμ, expectation values 〈z〉 and 〈 ρ 〉 of muon demonstrate "post-laser-pulse" oscillations after the ends of the laser pulses. In ddμ post-laser-pulse z-oscillations appear as shaped nonoverlapping "echo-pulses". In dtμ post-laser-pulse muonic z-oscillations appear as comparatively slow large-amplitude oscillations modulated with small-amplitude pulsations. The post-laser-pulse ρ-oscillations in both ddμ and dtμ appear, for the most part, as overlapping "echo-pulses". The post-laser-pulse oscillations do not occur if the Born–Oppenheimer approximation is employed. Power spectra generated due to muonic motion along both optically active z and optically passive ρ degrees of freedom are calculated. The fusion probability in dtμ can be increased by more than 11 times by making use of three sequential super-intense laser pulses. The energy released from the dt fusion in dtμ can by more than 20 GeV exceed the energy required to produce a usable muon and the energy of the laser pulses used to enhance the fusion. The possibility of power production from the laser-enhanced muon-catalyzed fusion is discussed.

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Interaction of ultra-intense laser pulses with relativistic ions

Laser and Particle Beams ◽

10.1017/s0263034604223023 ◽

2004 ◽

Vol 22 (3) ◽

pp. 203-206 ◽

Cited By ~ 4

Author(s):

C.C. CHIRILĂ ◽

C.J. JOACHAIN ◽

N.J. KYLSTRA ◽

R.M. POTVLIEGE

Keyword(s):

Laser Pulse ◽

Strong Field ◽

Ion Beam ◽

Laser Pulses ◽

Field Approximation ◽

High Order ◽

Intense Laser ◽

High Order Harmonic ◽

Intense Laser Pulses ◽

High Laser

At high laser intensities, three step recollision processes such as high order harmonic generation and high-order ATI, are normally severely suppressed due to the magnetic field component of the laser pulse. However, if the laser pulse and relativistic ion beam are directed against each other, a significant increase in the frequency and the intensity of the pulse in the rest frame of the ions can occur. By performing calculations based on a Coulomb-corrected nondipole strong field approximation, we have shown that there is a range of intensities, Lorentz factors, and ion charges for which the suppression of the three step recollision processes is not severe, even for ponderomotive energies exceeding 10 keV. As an example, we consider parameters relevant to the accelerator that will be built at GSI-Darmstadt, capable of accelerating multicharged ions to Lorentz factors reaching 30.

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Nonperturbative time-dependent density functional theory (TDDFT) and time-dependent electron localization function (TDELF) study of the ionization of OCS and CS2 with ultrashort intense laser pulses — Orientational effects

Canadian Journal of Chemistry ◽

10.1139/v2012-039 ◽

2012 ◽

Vol 90 (7) ◽

pp. 616-624 ◽

Cited By ~ 2

Author(s):

Emmanuel Fowe Penka ◽

André Dieter Bandrauk

Keyword(s):

Density Functional Theory ◽

Laser Pulse ◽

Density Functional ◽

Laser Pulses ◽

Time Dependent ◽

Intense Laser ◽

Electron Localization ◽

Functional Theory ◽

Intense Laser Pulses ◽

Dependent Density

The nonlinear nonperturbative response of OCS and CS2 to ultrashort (few cycles) intense laser pulses was studied numerically by time-dependent density functional theory (TDDFT) methods to understand molecular ionization as a function of laser–molecule orientation. A time-dependent electron localization function(TDELF) was used to visualize the nonlinear nonperturbative electron transfer occurring during the laser pulse. It was found that, for intensities I > 3.5 × 1014 W/cm2, the inner shell Kohn–Sham (KS) molecular orbitals contribute significantly to the ionization, whereas for the intensity I < 3.5 × 1014 W/cm2, the highest occupied molecular orbital (HOMO) shows the dominant response to the field. In general, the ionization rate maxima correspond to the alignment of maximum KS orbital densities with the laser pulse polarization instead of orbital ionization potentials (IP). These findings are corroborated through analysis of the TDELF images, where the ionization occurs from the lone pair or bond regions of the corresponding molecules.

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