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1,189 results on '"Petrov, Yu V"'

1. Integrated modelling of equilibrium and transport in axisymmetric magnetic mirror fusion devices

Author

Frank, S. J., Viola, J., Petrov, Yu. V., Anderson, J. K., Bindl, D., Biswas, B., Caneses, J., Endrizzi, D., Furlong, K., Harvey, R. W., Jacobson, C. M., Lindley, B., Marriott, E., Schmitz, O., Shih, K., and Forest, C. B.

Subjects
Physics - Plasma Physics
Abstract

This paper presents the Hammir tandem mirror design based on Realta Fusion's first-of-a-kind model for axisymmetric magnetic mirror fusion performance. This model uses an integrated end plug simulation model including, heating, equilibrium, and transport combined with a new formulation of the plasma operation contours (POPCONs) technique for the tandem mirror central cell. Using this model, it is shown that an end plug utilizing high temperature superconducting magnets and modern neutral beams enables a classical tandem mirror pilot plant producing a fusion gain Q > 5. The approach here represents an important advance in tandem mirror design. The high fidelity end plug model enables calculations of heating and transport in the highly non-Maxwellian end plug to be made more accurately and the central cell POPCON technique allows consideration of a wide range of parameters in the relatively simple near-Maxwellian central cell, facilitating the selection of more optimal central cell plasmas. These advances make it possible to find more conservative classical tandem mirror fusion pilot plant operating points with lower $\beta$, temperatures, neutral beam energies, and end plug performance than designs in the literature. Despite being more conservative, it is shown that these operating points can still form the basis of a viable fusion pilot plant.

Published
2024

3. Effect of Locked MHD Modes on the Efficiency of Plasma Heating by the Neutral Beam Injection Method at the Globus-M2 Spherical Tokamak

Author

Petrov, Yu. V., Balachenkov, I. M., Bakharev, N. N., Varfolomeev, V. I., Voronin, A. V., Gusev, V. K., Zhiltsov, N. S., Kavin, A. A., Kiselev, E. O., Kurskiev, G. S., Minaev, V. B., Miroshnikov, I. V., Novokhatskii, A. N., Sakharnov, N. V., Skrekel, O. M., Solokha, V. V., Telnova, A. Yu., Tkachenko, E. E., Tokarev, V. A., Tolstyakov, S. Yu., Tukhmeneva, E. A., Khromov, N. A., Shchegolev, P. B., and Shulyatyev, K. D.

Published
2024
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7. Set of Thomson Scattering Diagnostics for TRT

Author

Mukhin, E. E., Tolstyakov, S. Yu., Kurskiev, G. S., Zhiltsov, N. S., Ermakov, N. V., Tkachenko, E. E., Koval, A. N., Solovey, V. A., Aleksandrov, S. A., Nikolaev, A. V., Antropov, D. A., Bondar, A. V., Kedrov, I. V., Marchenko, T. A., Kornev, A. F., Makarov, A. M., Bogachev, D. L., Samsonov, D. S., Guk, E. G., Klimov, V. N., Smirnova, E. P., Sotnikov, A. V., Razdobarin, A. G., Bazhenov, A. N., Bocharov, I. V., Bocharnikov, V. A., Bukreev, I. M., Dmitriev, A. M., Elets, D. I., Tereshchenko, I. B., Varshavchik, L. A., Chernakov, An. P., Pankrat’ev, P. A., Marchii, G. V., Minbaev, M., Nikolaenko, K. O., Kungurtsev, N. A., Sakharov, N. V., Petrov, Yu. V., and Mokeev, A. N.

Published
2024
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8. Distinctive Features of Measuring Te and ne Spatial Distributions in the Globus-M2 Spherical Tokamak Using Method of Thomson Scattering of Laser Radiation

Author

Zhiltsov, N. S., Kurskiev, G. S., Solovey, V. A., Tkachenko, E. E., Tolstyakov, S. Yu., Balachenkov, I. M., Bakharev, N. N., Varfolomeev, V. I., Voronin, A. V., Gusev, V. K., Goryainov, V. Yu., D’yachenko, V. V., Ermakov, N. V., Kavin, A. A., Kiselev, E. O., Konovalov, A. N., Krikunov, S. V., Minaev, V. B., Mineev, A. B., Miroshnikov, I. V., Mukhin, E. E., Novokhatsky, A. N., Patrov, M. I., Petrov, Yu. V., Ponomarenko, A. M., Sakharov, N. V., Skrekel’, O. M., Solokha, V. V., Telnova, A. Yu., Tokarev, V. A., Tukhmeneva, E. A., Filippov, S. V., Khromov, N. A., Shchegolev, P. B., Shulyatiev, K. D., and Yashin, A. Yu.

Published
2024
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20. Diagnostic Complex of the Globus-M2 Spherical Tokamak

Author

Petrov, Yu. V., Bagryansky, P. A., Balachenkov, I. M., Bakharev, N. N., Brunkov, P. N., Varfolomeev, V. I., Voronin, A. V., Gusev, V. K., Goryainov, V. A., Dyachenko, V. V., Ermakov, N. V., Zhilin, E. G., Zhiltsov, N. S., Ivanenko, S. V., Il’yasova, M. V., Kavin, A. A., Kiselev, E. O., Konovalov, A. N., Krikunov, S. V., Kurskiev, G. S., Melnik, A. D., Minaev, V. B., Mineev, A. B., Miroshnikov, I. V., Mukhin, E. E., Novokhatsky, A. N., Petrov, A. V., Ponomarenko, A. M., Sakharov, N. V., Skrekel, O. M., Solomakhin, A. E., Solokha, V. V., Telnova, A. Yu., Tkachenko, E. E., Tokarev, V. A., Tolstyakov, S. Yu., Tukhmeneva, E. A., Khil’kevich, E. M., Khromov, N. A., Chernyshev, F. V., Shevelev, A. E., Shchegolev, P. B., Shulyat’ev, K. D., and Yashin, A. Yu.

Published
2023
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21. Divertor Thomson Scattering on Globus-M2

Author

Ermakov, N. V., Zhiltsov, N. S., Kurskiev, G. S., Mukhin, E. E., Tolstyakov, S. Yu., Tkachenko, E. E., Solovey, V. A., Bocharov, I. V., Dolgova, K. V, Kavin, A. A., Koval, A. N., Nikolaenko, K. O., Novokhatsky, A. N., Petrov, Yu. V., Rozhansky, V. A., Sakharov, N. V., and Senichenkov, I. Yu.

Published
2023
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22. Synthetic Diagnostic of Spectra of Charge-Exchange Atoms for Analysis of Influence of the MHD Instability on Fast-Particle Confinement in Spherical Tokamaks Globus-M/M2

Author

Kiselev, E. O., Balachenkov, I. M., Bakharev, N. N., Varfolomeev, V. I., Voronin, A. V., Goryainov, V. Yu., Gusev, V. K., Zhiltsov, N. S., Zenkova, O. A., Kurskiev, G. S., Melnik, A. D., Minaev, V. B., Miroshnikov, I. V., Patrov, M. I., Petrov, Yu. V., Sakharov, N. V., Skrekel, O. M., Telnova, A. Yu., Tkachenko, E. E., Tokarev, V. A., Tukhmeneva, E. A., Khromov, N. A., Chernyshov, F. V., and Shchegolev, P. B.

Published
2023
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23. Free-Boundary Plasma Equilibrium Computation in Spherical Globus-M2 Tokamak by Means of the pyGSS Code

Author

Kiselev, E. O., Balachenkov, I. M., Bakharev, N. N., Varfolomeev, V. I., Gusev, V. K., Zhiltsov, N. S., Zenkova, O. A., Kavin, A. A., Kurskiev, G. S., Minaev, V. B., Miroshnikov, I. V., Patrov, M. I., Petrov, Yu. V., Sakharov, N. V., Skrekel, O. M., Solokha, V. V., Telnova, A. Yu., Tkachenko, E. E., Tokarev, V. A., Tukhmeneva, E. A., Khromov, N. A., and Shchegolev, P. B.

Published
2023
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26. Development of Next-Generation Spherical Tokamak Concept. The Globus-3 Tokamak

Author

Minaev, V. B., Mineev, A. B., Sakharov, N. V., Petrov, Yu. V., Bakharev, N. N., Bondarchuk, E. N., Bondar, A. V., Varfolomeev, V. I., Voronova, A. A., Gusev, V. K., D’yachenko, V. V., Kavin, A. A., Kedrov, I. V., Konin, A. Yu., Kudryavtseva, A. M., Kurskiev, G. S., Labusov, A. N., Miroshnikov, I. V., Rodin, I. Yu., Tanchuk, V. N., Trofimov, V. A., Filatov, O. G., and Shchegolev, P. B.

Published
2023
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27. First Experiments on Reduction the Heat Load on the Divertor Plates of the Globus-M2 Tokamak Using Nitrogen Seeding and Their Comparison with Simulation Results

Author

Khromov, N. A., Bakharev, N. N., Vekshina, E. O., Gusev, V. K., Dolgova, K. V., Zhiltsov, N. S., Kiselev, E. O., Kurskiev, G. S., Minaev, V. B., Miroshnikov, I. V., Molchanov, P. A., Novokhatsky, A. N., Petrov, Yu. V., Rozhansky, V. A., Sakharov, N. V., Telnova, A. Yu., Timokhin, V. M., Tkachenko, E. E., Tokarev, V. A., Tukhmeneva, E. A., and Shchegolev, P. B.

Published
2023
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28. Features of Plasma Disruption in the Globus-M2 Spherical Tokamak

Author

Sakharov, N. V., Kavin, A. A., Mineev, A. B., Bakharev, N. N., Bondarchuk, E. N., Gusev, V. K., Zhiltsov, N. S., Kiselev, E. O., Kurskiev, G. S., Minaev, V. B., Petrov, Yu. V., Rodin, I. Yu., Skrekel, O. M., Telnova, A. Yu., Tkachenko, E. E., Tokarev, V. A., Tukhmeneva, E. A., and Shchegolev, P. B.

Published
2023
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29. Investigation of the effectiveness of non-inductive `multi-harmonic' electron cyclotron current drive through modeling multi-pass absorptions in the EXL-50 spherical tokamak

Author

Banerjee, D., Song, S. D., Xie, H. S., Liu, B., Wang, M. Y., Liu, W. J., Chen, B., Han, L., Luo, D., Song, Y. Y., Petrov, Yu. V., Song, X. M., Liu, M. S., Harvey, R. W., Shi, Y. J., Peng, Y. K. M., and team, the EXL50

Subjects
Physics - Plasma Physics
Abstract

The effectiveness of multiple electron cyclotron resonance (ECR) harmonics has been thoroughly investigated in context of high current drive efficiency, generally observed in fully non-inductive operation of the low aspect ratio EXL-50 spherical tokamak (ST) powered by electron cyclotron (EC) waves. The Fokker-Plank equation is numerically solved to obtain electron distribution function, under steady state of the relativistic nonlinear Coulomb collision and quasi-linear diffusion operators, for calculating plasma current driven by the injected EC wave. For the extra-ordinary EC wave, simulation results unfold a mechanism by which electrons moving around the cold second harmonic ECR layer strongly resonate with higher harmonics via the relativistic Doppler shifted resonance condition. This feature is in fact evident above a certain value of input EC wave power in simulation, indicating it to be a non-linear phenomenon. Similar to the experimental observation, high efficiency in current drive (over 1 A/W) has indeed been found in simulation for a typical low density ($\sim 1\times10^{18}~m^{-3}$), low temperature ($\lesssim 100$ eV) plasma of EXL-50 by taking into account multi-pass absorptions in our simulation model. However, such characteristic is not found in the ordinary EC-wave study for both single-pass and multi-pass simulations, suggesting it as inefficient in driving current on our ST device., Comment: 22 pages, 15 figures. Submitted to the Nuclear Fusion journal

Published
2021

34. Classification of Edge Instabilities at Globus-M2 Tokamak

Author

Solokha, V. V., Kurskiev, G. S., Yashin, A. Yu., Balachenkov, I. M., Varfolomeev, V. I., Voronin, A. V., Gusev, V. K., Goryainov, V. Yu., Dyachenko, V. V., Zhiltsov, N. S., Kiselev, E. O., Minaev, V. B., Novokhatsky, A. N., Petrov, Yu. V., Ponomarenko, A. M., Sakharov, N. V., Telnova, A. Yu., Tkachenko, E. E., Tokarev, V. A., Tolstyakov, S. Yu., Tukhmeneva, E. A., Khromov, N. A., and Shchegolev, P. B.

Published
2023
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35. Hot Ion Mode in the Globus-M2 Spherical Tokamak

Author

Kurskiev, G. S., Sakharov, N. V., Gusev, V. K., Minaev, V. B., Miroshnikov, I. V., Petrov, Yu. V., Telnova, A. Yu., Bakharev, N. N., Kiselev, E. O., Zhiltsov, N. S., Shchegolev, P. B., Balachenkov, I. M., Varfolomeev, V. I., Voronin, A. V., Goryainov, V. Yu., Dyachenko, V. V., Zhilin, E. G., Iliasova, M. V., Kavin, A. A., Konovalov, A. N., Krikunov, S. V., Lobanov, K. M., Melnik, A. D., Mineev, A. B., Novokhatsky, A. N., Patrov, M. I., Petrov, A. V., Ponomarenko, A. M., Skrekel’, O. M., Solovei, V. A., Solokha, V. V., Tkachenko, E. E., Tokarev, V. A., Tolstyakov, S. Yu., Tukhmeneva, E. A., Khilkevitch, E. M., Khromov, N. A., Chernyshev, F. V., Shevelev, A. E., Shulyat’ev, K. D., and Yashin, A. Yu.

Published
2023
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36. Laser ablation in liquid: bridge from a plasma stage to bubble formation

Author

Inogamov, N. A., Khokhlov, V. A., Petrov, Yu. V., and Zhakhovsky, V. V.

Subjects
Physics - Computational Physics, Physics - Applied Physics
Abstract

Laser ablation through liquid is an important process that have to be studied for applications which use laser ablation in liquid (LAL) and laser shock peening (LSP). LAL is employed for production of suspensions of nanoparticles, while LSP is applied to increase hardness and fatique/corrosion resistance properties of a surface layer. A bubble appears in liquid around the laser spot focused at a target surface after strong enough laser pulse. In the paper we connect the early quasi-plane heated layer created by a pulse in liquid and the bubble forming at much later stages. In the previous works these early stage from one side and the late stage from another side existed mainly as independent entities. At least, quantitative links between them were unknown. We consider how the quasi-plane heated layer of liquid forms thank to thermal conduction, how gradually conduction becomes weaker, and how the heated layer of liquid nearly adiabatically expands to few orders of magnitude in volume during the drop of pressure. Our molecular dynamics simulations show that the heated layer is filled by the diffusive atomic metal-liquid mixture. Metal atoms began to condense into nanoparticles (NP) when they meet cold liquid outside the edge of a mixing zone. This process limits diffusive expansion of metal atoms, because diffusive ability of NP is less than this ability for individual atoms. Thus the mixture expands together with hot liquid, and the NPs approximately homogeneously fill an interior of a bubble., Comment: 13 pages, 19 figures - paper was reported on FLAMN-2019 https://flamn.ifmo.ru/ and submitted to "Optical and Quantum Electronics"

Published
2019

37. Modelling and optimization of the excitonic diffraction grating

Author

Shapochkin, P. Yu., Petrov, Yu. V., Eliseev, S. A., Lovcjus, V. A., Efimov, Yu. P., and Kapitonov, Yu. V.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

Periodical spatial modulation of the excitonic resonance in a quantum well could lead to the formation of a new highly directional and resonant coherent optical response -- resonant diffraction. Such excitonic diffraction gratings were demonstrated in epitaxially grown quantum wells patterned by the low-dose ion beam irradiation before or after the growth. In this paper we present a theoretical model of the resonant diffraction formation based on the step-by-step approximation of the Maxwell equation solution. The resulting theory allows us to reliably describe experimental data, as well as to predict the way to increase the diffraction efficiency., Comment: Shortened version

Published
2019
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41. Engineering-Physical Model (GLOBSYS) for the Next STEP of the Globus-M Spherical Tokamak Program: Verification of Some Subsystems on Achieved and Predictable Data from Installations NSTX, NSTX-U, MAST, MAST-U, and ST40

Author

Mineev, A. B., Bondarchuk, E. N., Kavin, A. A., Konin, A. Yu., Rodin, I. Yu., Tanchuk, V. N., Trofimov, V. A., Filatov, O. G., Bakharev, N. N., Zhilzov, N. S., Kurskiev, G. S., Kiselev, E. O., Minaev, V. B., Sakharov, N. V., Petrov, Yu. V., and Telnova, A. Yu.

Published
2022
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43. Parametric Studies of a Globus-3 Spherical Tokamak with Various Options of Electromagnetic Systems Based on Copper Alloys Using the GLOBSYS Code

Author

Mineev, A. B., Minaev, V. B., Sakharov, N. V., Bakharev, N. N., Bondarchuk, E. N., Voronova, A. A., Glushaev, A. M., Grigoriev, S. A., Gusev, V.K., Zhiltsov, N. S., Zapretilina, E. R., Kavin, A. A., Kiselev, E. O., Konin, A. Yu., Kudriavtseva, A. M., Kurskiev, G. S., Labusov, A. N., Petrov, Yu. V., Rodin, I. Yu., Tanchuk, V. N., Tel’nova, A. Yu., Trofimov, V. A., and Filatov, O. G.

Published
2022
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48. Spectroscopic Diagnostic of the Peripheral Plasma in the Globus-M2 Tokamak with the Injection of Neutral Helium

Author

Timokhin, V. M., Sergeev, V. Yu., Anufriev, E. A., Korobko, D. D., Sharov, I. A., Varfolomeev, V. I., Novokhatsky, A. N., Bakharev, N. N., Vekshina, E. O., Dolgova, K. V., Zhil’tsov, N. S., Kavin, A. A., Kapralov, V. G., Kiselev, E. O., Koval’, A. N., Kurskiev, G. S., Lobanov, K. M., Minaev, V. B., Miroshnikov, I. V., Mukhin, E. E., Petrov, Yu. V., Rozhansky, V. A., Sakharov, N. V., Skokov, V. G., Tel’nova, A. Yu., Tkachenko, E. E., Tokarev, V. A., Tolstyakov, S. Yu., Tyukhmeneva, E. A., and Khromov, N. A.

Published
2022
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49. Condensation of laser produced gold plasma during expansion and cooling in water environment

Author

Petrov, Yu. V., Inogamov, N. A., Zhakhovsky, V. V., and Khokhlov, V. A.

Subjects
Physics - Computational Physics, Condensed Matter - Soft Condensed Matter
Abstract

The ecologically best way to produce nanoparticles (NP) is based on laser ablation in liquid (LAL). In the considered here case the LAL means that a gold target is irradiated through transparent water. During and after irradiation the heated material from surface of a target forms a plume which expands into liquid. In this paper we study a reach set of physical processes mixed with complicated hydrodynamic phenomena which all accompany LAL. These theoretical and simulation investigations are very important for practical applications. Laser pulses with different durations $\tau_L$ covering 5-th orders of magnitudes range from 0.1 ps to 0.5 ns and large absorbed fluences $F_{abs}$ near optical breakdown of liquid are compared. It is shown that the trajectory of the contact boundary with liquid at the middle and late stages after passing of the instant of maximum intensity of the longest pulse are rather similar for very different pulse durations (of course at comparable energies $F_{abs});$ we consider the pulses with a Gaussian temporal shape $I\propto \exp(-t^2/\tau_L^2).$ We follow how hot (few eV range) dense gold plasma expands, cools down, intersects a saturation curve, and condenses into NPs. These NPs appear first inside the water-gold diffusively mixed intermediate layer where gold vapor has the lowest temperature. Later in time pressure around the gold-water contact drops down below critical pressure for water. Thus NPs find themselves in gaseous water bubble where density of water gradually decreases to $10^{-4}-10^{-5}$ g/cm$\!^3$ at the instant of maximum expansion of a bubble., Comment: 21 pages, 11 figures

Published
2018
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50. Laser-induced ablation of metal in liquid

Author

Petrov, Yu. V., Khokhlov, V. A., Zhakhovsky, V. V., and Inogamov, N. A.

Subjects
Physics - Computational Physics
Abstract

Laser ablation in liquid (LAL) is important perspective way to compose nanoparticles (NP) necessary for modern technologies. LAL is not fully understood. Deep understanding is necessary to optimize processes and decrease high price of the LAL NPs. Today there are two groups of studies: in one of them scientists go from analyzing of bubble dynamics (thus they proceed from the late stages), while in another one scientists investigate early stages of ablation. In the present paper we consider the process as whole: from ablation and up to formation of a bubble and its inflation. Thus we cover extremely wide range of spatiotemporal scales. We consider role of absorbed energy and duration of pulse (femtosecond, multi-picosecond, nanosecond). Importance of supercritical states is emphasized. Diffusive atomic and hydrodynamic mixing due to Rayleigh-Taylor instability and their mutual interdependence are described. Liquid near contact with metal is heated by dissipation in strong shock and due to small but finite heat conduction in liquid; metal absorbing laser energy is hot and thus it serves as a heater for liquid. Spatial expansion and cooling of atomically mixed liquid and metal causes condensation of metal into NPs when pressure drops below critical pressure for metal. Development of bubble takes place during the next stages of decrease of pressure below critical parameters for liquid and below ambient pressure in liquid. Thin hot layer of liquid near contact expands in volume to many orders of magnitude filling the inflating bubble., Comment: 44 pages, 24 figures

Published
2018

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