Laser electron acceleration in the prepulse produced plasma corona

Published on Oct 1, 2015
· DOI :10.1088/1742-6596/653/1/012006
N. E. Andreev10
Estimated H-index: 10
(RAS: Russian Academy of Sciences),
Mikhail E. Povarnitsyn15
Estimated H-index: 15
(RAS: Russian Academy of Sciences)
+ 1 AuthorsPavel Levashov30
Estimated H-index: 30
(RAS: Russian Academy of Sciences)
Sources
Abstract
The generation of hot electrons at grazing incidence of a subpicosecond relativistic-intense laser pulse onto the plane solid target is analyzed for the parameters of the petawatt class laser systems. We study the preplasma formation on the surface of solid Al target produced by the laser prepulses with different time structure. For modeling of the preplasma dynamics we use a wide-range two-temperature hydrodynamic model. As a result of simulations, the preplasma expansion under the action of the laser prepulse and the plasma density profiles for different contrast ratios of the nanosecond pedestal are found. These density profiles were used as the initial density distributions in 3-D PIC simulations of electron acceleration by the main P-polarized laser pulse. Results of modeling demonstrate the substantial increase of the characteristic energy and number of accelerated electrons for the grazing incidence of a subpicosecond intense laser pulse in comparison with the laser-target interaction at normal incidence.
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References10
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The thermophysical properties of Nickel plasma have been calculated for the temperatures 10–60 kK and densities less than 1 g/cm3. These properties are the pressure, internal energy, heat capacity, and the electronic transport coefficients (electrical conductivity, thermal conductivity, and thermal power). The thermodynamic values have been calculated by means of the chemical model, which also allows one to obtain the ionic composition of considered plasma. The composition has been used to calcu...
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#1Nikolay AndreevH-Index: 22
Last. Markus Roth (Technische UniversitÀt Darmstadt)H-Index: 115
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The two-temperature, 2D hydrodynamic code Hydro–ELectro–IOnization–2–Dimensional (HELIO2D), which takes into account self-consistently the laser energy absorption in a target, ionization, heating, and expansion of the created plasma is elaborated. The wide-range two-temperature equation of state is developed and used to model the metal target dynamics from room temperature to the conditions of weakly coupled plasma. The simulation results are compared and demonstrated a good agreement with exper...
Source
#1F. Wagner (Technische UniversitÀt Darmstadt)H-Index: 14
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We used time-resolved shadowgraphy to characterize the pre-plasma formation in solid-target interaction experiments with micrometer-scale accuracy. We performed quantitative measurements of the plasma density for amplified spontaneous emission (ASE) levels ranging from 2·10−7 to 10−10 backed with 2-dimensional hydrodynamic simulations. We find that ASE levels above 10−9 are able to create a significant pre-plasma plume that features a plasma canal driving a self-focusing of the laser beam. For A...
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Abstract When a finite contrast petawatt laser pulse irradiates a micron-thick foil, a prepulse (including amplified spontaneous emission) creates a preplasma, where an ultrashort relativistically strong portion of the laser pulse (the main pulse) acquires higher intensity due to relativistic self-focusing and undergoes fast depletion transferring energy to fast electrons. If the preplasma thickness is optimal, the main pulse can reach the target accelerating fast ions more efficiently than an i...
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#2Nikolay AndreevH-Index: 22
Last. Olga RosmejH-Index: 1
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The irradiation of thin films by intensive subpicosecond laser pulses with nanosecond prepulse is accompanied by a number of various physical processes. The laser beam transmissions through the film as well as the re-emission flux on both sides of the film plasma have been evaluated by simulation for Al and CH2 materials. It has been demonstrated that the thickness of the film can be chosen to cut off the long nanosecond prepulse whereas the main pulse is transmitted through the plasma. Thus, th...
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#2Nikolay Andreev (MIPT: Moscow Institute of Physics and Technology)H-Index: 22
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Abstract High precision pump-probe experiments can provide a valuable information about material states out of equilibrium. A wide-range numerical model is used for the description of material response on ultrashort laser action. The model is developed on the basis of two-temperature hydrodynamics with heat transport, ionization, plasma expansion, electron-ion collisions and two-temperature equation of state for an irradiated substance. Comparison of experimental findings with the results of sim...
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Laser contrast is a crucial parameter in experiments with high-intensity high-energy pulses. For relativistic intensities of the main pulse ≳1019W/cm2, even high-contrast beams can produce plasma on the target surface due to a long nanosecond prepulse action which results in an undesirable early smearing of the target. In particular, dynamics of thin foils under the prepulse action is especially important for the laser ion acceleration technique and x-rays generation. To avoid the influence of t...
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The three-dimensional particle-in-cell (PIC) code VLPL (Virtual Laser Plasma Lab) allows, for the first time, direct fully electromagnetic simulations of relativistic laser–plasma interactions. Physical results on relativistic self-focusing in under-dense plasma are presented. It is shown that background plasma electrons are accelerated to multi-MeV energies and 10 4 T magnetic fields are generated in the process of self-focusing at high laser intensities. This physics is crucial for the fast ig...
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We use simulations to investigate the interaction of ultra-intense laser pulses with a plasma. With an intensity greater than {10}^{18}W/{\mathrm{cm}}^{2} these pulses have a pressure greater than {10}^{3}M bar and drive the plasma relativistically. Hole boring by the light beam is a key feature of the interaction. We find substantial absorption into heated electrons with a characteristic temperature of order the pondermotive potential. Other effects include a dependence on the polariza...
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Analytical expressions are derived for the dielectric function of metals at moderate temperatures, determined by electron–phonon interactions, taking a quantum statistical approach and linear response theory as a basis. The obtained formulas permit one to calculate an effective electron–phonon collision frequency and the dielectric function of two-temperature plasmas for arbitrary laser radiation frequencies. Different limiting cases are considered.
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#1M E PovarnitsynH-Index: 1
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We use a wide-range model of thermodynamic, transport and optical properties for simulation of laser-induced dynamics of aluminum plasma. The model describes the laser energy absorption, electron thermal conductivity and two-temperature effects of electron-ion collisions as well as hydrodynamic motion of matter. The model successfully describes experiments on self-reflectivity in wide range of intensities, and angular dependence of reflectivity coefficient for S- and P-polarized pulses. Thus, th...
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#2V S Popov (MIPT: Moscow Institute of Physics and Technology)H-Index: 1
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The performed simulations in contrast to the previous studies have shown that the generation of the wake wave in the self-modulational regime, its wavebreaking with subsequent particle injection and acceleration occur for the initially Gaussian envelope of the laser pulse if the processes of tunnelling ionization are taken into account. The self-modulation evolve faster in comparison to the case without ionization because of the abrupt density inhomogeneities which appear at the front edge of th...
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