Персона:
Кочетков, Юрий Владимирович

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.

Фамилия

Кочетков

Имя

Юрий Владимирович

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Теперь показываю 1 - 10 из 15

Только метаданные
Investigation of magnetized plasma created in snail targets at the PALS facility
(2022) Pisarczyk, T.; Renner, O.; Dudzak, R.; Chodukowski, T.; Kochetkov, I.; Korneev, P.; Кочетков, Юрий Владимирович; Корнеев, Филипп Александрович
Только метаданные
Optical generation of quasistationary plasma electromagnetic structures for particle collimation with petawatt picosecond lasers
(2025) Korneev, P.; Bukharskii, N. D.; Kochetkov, I. V.; Ehret, M.; Корнеев, Филипп Александрович; Бухарский, Николай Дмитриевич; Кочетков, Юрий Владимирович
Только метаданные
Investigation of spontaneous magnetic fields, electron and ion emission in laser-produced plasma experiments at PALS
(2019) Pisarczyk, T.; Batani, D.; Dudzak, R.; Zaras-Szydlowska, A.; Gus'kov, S. Yu.; Korneev, P. h.; Kochetkov, J.; Martynenko, A. S.; Корнеев, Филипп Александрович; Кочетков, Юрий Владимирович
Только метаданные
Complex interferometry of magnetized plasma: Accuracy and limitations
(2021) Pisarczyk, T.; Kalal, M.; Chodukowski, T.; Zaras-Szydlowska, A.; Kochetkov, I.; Korneev, P.; Кочетков, Юрий Владимирович; Корнеев, Филипп Александрович
© 2021 Author(s).Expanding laser plasmas, produced by high energy laser radiation, possess both high thermal and magnetic field energy densities. Characterization of such plasma is challenging but may provide essential information needed for understanding its physical behavior. Among the standard experimental techniques used for plasma diagnostics, conventional interferometry is one of the most convenient, informative, and accurate. Attempts to extract more information from each laser shot on large facilities have led to development of complex interferometry, which allows us to reconstruct both plasma electron density and magnetic field distributions from a single data object. However, such a benefit requires more accurate processing, critically important in some situations. This work focuses on quasi-axisymmetric interaction geometry. Starting from basic principles, we present a general analysis, consider main error sources, and obtain plasma density and magnetic field distributions with their derived error bars. A regularization procedure, significantly decreasing an error near the plasma symmetry axis, is proposed and analyzed in detail. With use of synthetic datasets, the presented analysis is generally universal for quasi-axisymmetric plasmas.
Только метаданные
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.
Только метаданные
Hot electron retention in laser plasma created under terawatt subnanosecond irradiation of Cu targets
(2020) Pisarczyk, T.; Kalal, M.; Gus'kov, S. Y.; Batani, D.; Kochetkov, I.; Korneev, P.; Кочетков, Юрий Владимирович; Корнеев, Филипп Александрович
Laser plasma created by intense light interaction with matter plays an important role in high-energy density fundamental studies and many prospective applications. Terawatt laser-produced plasma related to the low collisional and relativistic domain may form supersonic flows and is prone to the generation of strong spontaneous magnetic fields. The comprehensive experimental study presented in this work provides a reference point for the theoretical description of laser-plasma interaction, focusing on the hot electron generation. It experimentally quantifies the phenomenon of hot electron retention, which serves as a boundary condition for most plasma expansion models. Hot electrons, being responsible for nonlocal thermal and electric conductivities, are important for a large variety of processes in such plasmas. The multiple-frame complex-interferometric data providing information on time resolved spontaneous magnetic fields and electron density distribution, complemented by particle spectra and x-ray measurements, were obtained under irradiation of the planar massive Cu and plastic-coated targets by the iodine laser pulse with an intensity of above 10(16)W cm(-2). The data shows that the hot electron emission from the interaction region outside the target is strongly suppressed, while the electron flow inside the target,i.e.in the direction of the incident laser beam, is a dominant process and contains almost the whole hot electron population. The obtained quantitative characterization of this phenomenon is of primary importance for plasma applications spanning from ICF to laser-driven discharge magnetic field generators.
Только метаданные
Terahertz annular antenna driven with a short intense laser pulse
(2022) Bukharskii, N.; Kochetkov, I.; Korneev, P.; Бухарский, Николай Дмитриевич; Кочетков, Юрий Владимирович; Корнеев, Филипп Александрович
© 2022 Author(s).Generation of terahertz radiation by an oscillating discharge, excited by short laser pulses, may be controlled by geometry of the irradiated target. In this work, an annular target with a thin slit is considered as an efficient emitter of secondary radiation when driven by a short intense laser pulse. Under irradiation, a slit works as a diode, which is quickly filled by dense plasmas, closing the circuit for a traveling discharge pulse. Such a diode defines the discharge pulse propagation direction in a closed contour, enabling its multiple passes along the coil. The obtained oscillating charge efficiently generates multi-period quasi-monochromatic terahertz waves with a maximum along the coil axis and controllable characteristics.
Только метаданные
Electron accelerator driven by 1TW femtosecond laser pulses: Targetry, principles and prospects
(2024) Ivanov, K. A.; Tsymbalov, I. N.; Gorlova, D. A.; Kochetkov, Yu. V.; Кочетков, Юрий Владимирович
Только метаданные
Multi MeV high charge electron beam source utilizing 1 TW laser and shock wave in gas jet target
(2022) Ivanov, K. A.; Tsymbalov, I. N.; Gorlova, D. A.; Shulyapov, S. A.; Tsygvintsev, I. P.; Kochetkov, Yu. V.; Volkov, R. V.; Savel'ev, A. B.; Кочетков, Юрий Владимирович
The high charge electron beam is generated at interaction of 1 TW laser pulse with gas target tailored by nanosecond prepulse forming a shock wave. Propagation of intense femtosecond pulse through complex plasma slab accelerates electrons up to 10 MeV. The debris free target has potential to kHz laser application and electrons energy enhancement using more powerful femtosecond laser pulse. © 2022 IEEE.
Только метаданные
Kilotesla plasmoid formation by a trapped relativistic laser beam
(2022) Ehret, M.; Kochetkov, Y.; Bukharskii, N.; Stepanishchev, V.; Korneev, P.; Кочетков, Юрий Владимирович; Бухарский, Николай Дмитриевич; Корнеев, Филипп Александрович
A strong quasistationary magnetic field is generated in hollow targets with curved internal surface under the action of a relativistically intense picosecond laser pulse. Experimental data evidence the formation of quasistationary strongly magnetized plasma structures decaying on a hundred picoseconds timescale, with the magnetic field strength of the kilotesla scale. Numerical simulations unravel the importance of transient processes during the magnetic field generation and suggest the existence of fast and slow regimes of plasmoid evolution depending on the interaction parameters. The proposed setup is suited for perspective highly magnetized plasma application and fundamental studies. © 2022 American Physical Society.