Персона: Корнеев, Филипп Александрович
Загружается...
Email Address
Birth Date
Научные группы
Организационные подразделения
Организационная единица
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.
Статус
Фамилия
Корнеев
Имя
Филипп Александрович
Имя
4 results
Результаты поиска
Теперь показываю 1 - 4 из 4
- ПубликацияТолько метаданныеCollisionless 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.
- ПубликацияТолько метаданныеKinetic plasma waves carrying orbital angular momentum(2019) Blackman, D. R.; Nuter, R.; Tikhonchuk, V. T.; Korneev, P. h.; Корнеев, Филипп АлександровичThe structure of Langmuir plasma waves carrying a finite orbital angular momentum is revised in the paraxial approximation. It is shown that the kinetic effects related to higher-order momenta of the electron distribution function lead to coupling of Laguerre-Gaussian modes and result in a modification of the wave dispersion and damping. The theoretical analysis is compared to the three-dimensional particle-in-cell numerical simulations for a mode with orbital momentum l = 2. It is demonstrated that propagation of such a plasma wave is accompanied with generation of quasistatic axial and azimuthal magnetic fields which result from the orbital and longitudinal momenta transported with the wave, respectively.
- ПубликацияТолько метаданныеTwisted 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.
- ПубликацияТолько метаданныеStochastic 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.