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Корнеев, Филипп Александрович

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Институт лазерных и плазменных технологий
Стратегическая цель Института ЛаПлаз – стать ведущей научной школой и ядром развития инноваций по лазерным, плазменным, радиационным и ускорительным технологиям, с уникальными образовательными программами, востребованными на российском и мировом рынке образовательных услуг.
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Корнеев
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Филипп Александрович
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20194
4
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Автор: Korneev, P. × Имеет файлы: No ×

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  • Уменьшенное изображение
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    Elaboration of 3-frame complex interferometry for optimization studies of capacitor-coil optical magnetic field generators
    (2019) Pisarczyk, T.; Santos, J. J.; Dudzak, R.; Zaras-Szydowska, A.; Gus'kov, S. Y.; Korneev, P.; Kochetkov, I.; Корнеев, Филипп Александрович; Кочетков, Юрий Владимирович
    Recently developed three-frame complex-interferometry system driven by a Ti:Sa laser with 40 fs pulse has been installed at the PALS (Prague Asterix Laser System) laser facility. This unique diagnostic allows for the first time to perform simultaneous measurements of B-field in the coil region of the capacitor-coil targets (CCT) and the self-generated B-field (SMF) of the diode plasma in between the CCT-plates. CCT were irradiated by the PALS iodine laser (lambda = 1315 nm) with energy in the range 250-500 J and pulse duration of 350 ps at full width at half maximum. The operation of this diagnostic system and methodologies for quantitative data analysis are presented in this study, including: (i) obtaining information about the induction of the magnetic field in the CCT coil based on measurements of the Faraday effect in the TGG (Terbium Gallium Garnet) paramagnetic crystal at the coil vicinity and (ii) determining magnetic field and current density distributions in the capacitor region of the CCT by analysis of the complex interferograms. The preliminary measurements confirmed the high potential of the reported setup for optimization studies of CCT targets.
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    Collisionless Shocks Driven by Supersonic Plasma Flows with Self-Generated Magnetic Fields
    (2019) Li, C. K.; Tikhonchuk, V. T.; Moreno, Q.; Sio, H.; Korneev, P.; Корнеев, Филипп Александрович
    © 2019 American Physical Society.Collisionless shocks are ubiquitous in the Universe as a consequence of supersonic plasma flows sweeping through interstellar and intergalactic media. These shocks are the cause of many observed astrophysical phenomena, but details of shock structure and behavior remain controversial because of the lack of ways to study them experimentally. Laboratory experiments reported here, with astrophysically relevant plasma parameters, demonstrate for the first time the formation of a quasiperpendicular magnetized collisionless shock. In the upstream it is fringed by a filamented turbulent region, a rudiment for a secondary Weibel-driven shock. This turbulent structure is found responsible for electron acceleration to energies exceeding the average energy by two orders of magnitude.
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    Twisted Kinetic Plasma Waves
    (2019) Blackman, D. R.; Nuter, R.; Tikhonchuk, V. T.; Korneev, P.; Корнеев, Филипп Александрович
    © 2019, Springer Science+Business Media, LLC, part of Springer Nature.Similarly to electromagnetic waves, plasma waves can also carry an orbital angular momentum. A key distinction from electromagnetic waves is that plasma waves are intrinsically coupled to electrons and may deposit their momentum with electrons, resulting in their secular motion and generation of quasistatic magnetic fields. In this paper, we present an analysis of kinetic plasma waves carrying an orbital angular momentum in the paraxial approximation by considering the energy and momentum exchange between the wave and electrons and the average electron motion induced by plasma wave damping.
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    Stochastic electron heating in an interference field of several laser pulses of a picosecond duration
    (2019) Bochkarev, S. G.; D'Humieres, E.; Tikhonchuk, V. T.; Bychenkov, V. Yu.; Korneev, P.; Корнеев, Филипп Александрович
    © 2019 IOP Publishing Ltd. Efficient electron acceleration and heating is demonstrated in a multimode structure created by interference of several laser beams of a relativistic intensity and a picosecond duration near a sharp target boundary. Electron energization proceeds in two steps, with a slow stochastic heating followed by a fast regular acceleration in a resonance interaction with one of wave packets. It results in formation of a population of energetic electrons with an exponential distribution in energy characterized by a high effective temperature and a sharp cutoff. Hot electron characteristics depend on the number of crossing laser beams and their respective angles. This process is an example of efficient electron heating in vacuum by electromagnetic fields without participation of electrostatic plasma waves. It might contribute to creation of a superthermal particle population with an effective temperature significantly exceeding the common ponderomotive scaling.