Персона: Кочетков, Юрий Владимирович
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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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Юрий Владимирович
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- ПубликацияОткрытый доступImplementation of amplitude-phase analysis of complex interferograms for measurement of spontaneous magnetic fields in laser generated plasma(2020) Zaras-Szydlowska, A.; Pisarczyk, T.; Chodukowski, T.; Rusiniak, Z.; Kochetkov, I.; Кочетков, Юрий Владимирович© 2020 Author(s).Generation of spontaneous magnetic fields (SMFs) is one of the most interesting phenomena accompanying an intense laser-matter interaction. One method of credible SMFs measurements is based on the magneto-optical Faraday effect, which requires simultaneous measurements of an angle of polarization plane rotation of a probe wave and plasma electron density. In classical polaro-interferometry, these values are provided independently by polarimetric and interferometric images. Complex interferometry is an innovative approach in SMF measurement, obtaining information on SMF directly from a phase-amplitude analysis of an image called a complex interferogram. Although the theoretical basis of complex interferometry has been well known for many years, this approach has not been effectively employed in laser plasma research until recently; this approach has been successfully implemented in SMF measurement at the Prague Asterix Laser System (PALS). In this paper, proprietary construction solutions of polaro-interferometers are presented; they allow us to register high-quality complex interferograms in practical experiments, which undergo quantitative analysis (with an original software) to obtain information on the electron density and SMFs distributions in an examined plasma. The theoretical foundations of polaro-interferometric measurement, in particular, complex-interferometry, are presented. The main part of the paper details the methodology of the amplitude-phase analysis of complex interferograms. This includes software testing and examples of the electron density and SMF distribution of a laser ablative plasma generated by irradiating Cu thick planar targets with an iodine PALS laser at an intensity above about 1016 W/cm2.
- ПубликацияОткрытый доступOn the proton radiography of magnetic fields in targets irradiated by intense picosecond laser pulses(2020) Ehret, M.; Santos, J. J.; Zielbauer, B.; Abe, Y.; Bukharskii, N. D.; Kochetkov, Y. V.; Gubskiy, K. L.; Kuznetsov, A. P.; Korneev, P. A.; Бухарский, Николай Дмитриевич; Кочетков, Юрий Владимирович; Губский, Константин Леонидович; Кузнецов, Андрей Петрович; Корнеев, Филипп Александрович© Published under licence by IOP Publishing Ltd.Proton radiography is a common diagnostic technique in laser-driven magnetic field generation studies. It is based on measuring proton beam deflection in electromagnetic fields induced around the target with the help of radiochromic film stacks. Unraveling information recorded in experimental radiographs and extracting the field profiles is not always a straightforward task. In this paper, some aspects of data analysis by reproducing experimental radiographs in numerical simulations are described. The approach allows determining the field strength and structure in the target area for various target geometries.
- ПубликацияОткрытый доступЛазерная генерация спонтанных магнитных полей в плазме, возбуждаемой излучением тера- и петаватного уровня мощности, и их диагностика методами комплексной интерферометрии и протонной дефлектометрии(НИЯУ МИФИ, 2024) Кочетков, Ю. В.; Кочетков, Юрий Владимирович; Кузнецов, А. П.