Plasma Physics Reports最新文献_第3页

Distinctive Features of Measuring Te and ne Spatial Distributions in the Globus-M2 Spherical Tokamak Using Method of Thomson Scattering of Laser Radiation 利用汤姆逊激光散射法测量 Globus-M2 球形托卡马克中 Te 和 ne 空间分布的显著特点

IF 0.9 4区物理与天体物理

Plasma Physics Reports Pub Date : 2024-05-16 DOI: 10.1134/S1063780X24600099

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

{"title":"Distinctive Features of Measuring Te and ne Spatial Distributions in the Globus-M2 Spherical Tokamak Using Method of Thomson Scattering of Laser Radiation","authors":"N. S. Zhiltsov, G. S. Kurskiev, V. A. Solovey, E. E. Tkachenko, S. Yu. Tolstyakov, I. M. Balachenkov, N. N. Bakharev, V. I. Varfolomeev, A. V. Voronin, V. K. Gusev, V. Yu. Goryainov, V. V. D’yachenko, N. V. Ermakov, A. A. Kavin, E. O. Kiselev, A. N. Konovalov, S. V. Krikunov, V. B. Minaev, A. B. Mineev, I. V. Miroshnikov, E. E. Mukhin, A. N. Novokhatsky, M. I. Patrov, Yu. V. Petrov, A. M. Ponomarenko, N. V. Sakharov, O. M. Skrekel’, V. V. Solokha, A. Yu. Telnova, V. A. Tokarev, E. A. Tukhmeneva, S. V. Filippov, N. A. Khromov, P. B. Shchegolev, K. D. Shulyatiev, A. Yu. Yashin","doi":"10.1134/S1063780X24600099","DOIUrl":"10.1134/S1063780X24600099","url":null,"abstract":"The results of measuring the electron temperature and density spatial distributions in plasma of the Globus-M2 tokamak using the Thomson scattering diagnostics are presented. The diagnostics provides measurements throughout the entire tokamak discharge, starting from time of gas breakdown. The Thomson scattering data were analyzed in order to determine the positions of the last closed flux surface, the plasma magnetic axis, and the radius of inversion during the saw-tooth oscillations. The results of measurements performed during the internal reconnection of magnetic field lines are presents, as well as the dynamics of spatial distributions of electron temperature, density and pressure during the plasma transition to the H-mode. The results of measuring the electron temperature distribution in the scrape-off layer using the Thomson scattering diagnostics are also presented for distances up to 4 cm outside the last closed flux surface.","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"50 3","pages":"310 - 321"},"PeriodicalIF":0.9,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141060906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Deposition of Thin Refractory-Metal-Films onto Glasses through Diaphragms at Plasma Focus Facility 在等离子体聚焦设备上通过隔膜在玻璃上沉积薄耐火金属膜

IF 0.9 4区物理与天体物理

Plasma Physics Reports Pub Date : 2024-05-16 DOI: 10.1134/S1063780X24600178

V. N. Kolokoltsev, V. Ya. Nikulin, P. V. Silin, I. V. Borovitskaya, E. N. Peregudova, A. I. Gaidar, L. I. Kobeleva, A. M. Mezrin, A. A. Eriskin

{"title":"Deposition of Thin Refractory-Metal-Films onto Glasses through Diaphragms at Plasma Focus Facility","authors":"V. N. Kolokoltsev, V. Ya. Nikulin, P. V. Silin, I. V. Borovitskaya, E. N. Peregudova, A. I. Gaidar, L. I. Kobeleva, A. M. Mezrin, A. A. Eriskin","doi":"10.1134/S1063780X24600178","DOIUrl":"10.1134/S1063780X24600178","url":null,"abstract":"The results of experiments are presented on the deposition onto silicate glasses of thin refractory-metal-films: molybdenum, tantalum and tungsten. The technique used for manufacturing films was based on the deposition of metal-containing plasma formed when exposing the surface of foils made of refractory metals to high-power plasma and ion pulses. For generation of such pulses, the facility of plasma focus type was used, which makes it possible to obtain ion beams and plasma flows with the energy flux density in the range of 1010–1012 W/cm2. The most intense central part of the ion-plasma flow was separated using metal di-aphragms with aperture diameters of 2.5, 3.5, and 4.5 mm. Metal Mo, Ta and W films with dimensions of ∅3–5 mm were obtained on the surfaces of glasses. Metal films are characterized by good adhesion, since they coalesce with the glass surface. It was discovered that the planarity of films becomes violated due to the drift of molten metal particles under the glass surface. The relief of films is non-uniform, which can be explained by the presence of micrometer-sized metal particles in the plasma flow.","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"50 3","pages":"342 - 349"},"PeriodicalIF":0.9,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141060908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of the Method of Excitation of the Plasma Antenna on the Spectral Characteristics of the Radiated Signal 等离子天线的激发方法对辐射信号光谱特性的影响

IF 0.9 4区物理与天体物理

Plasma Physics Reports Pub Date : 2024-05-16 DOI: 10.1134/S1063780X24600166

N. N. Bogachev, I. L. Bogdankevich, S. E. Andreev, N. G. Gusein-zade, M. S. Usachonak

{"title":"Effect of the Method of Excitation of the Plasma Antenna on the Spectral Characteristics of the Radiated Signal","authors":"N. N. Bogachev, I. L. Bogdankevich, S. E. Andreev, N. G. Gusein-zade, M. S. Usachonak","doi":"10.1134/S1063780X24600166","DOIUrl":"10.1134/S1063780X24600166","url":null,"abstract":"The radiation of signal by the plasma asymmetrical dipole antenna is studied for two methods of its excitation. Earlier, it was shown that the 2nd and 3rd harmonics of the input signal frequency in the radiation spectrum of the plasma antenna are 10–20 dB stronger than those of a metal antenna with the same geometry. In this work, we study experimentally and by computer simulations the effect of the method of excitation of the plasma asymmetrical dipole antenna on the spectral characteristics of the signal that it radiates. For the two excitation methods of the antenna, through an electrode and through a coaxial coupler, it was shown that the strength of the signal components at the frequency of the radiated signal and its multiple harmonics is different. The introduction of the coaxial coupler in the antenna excitation scheme allowed us to improve the coupling at the input signal frequency and decrease its components at the 2nd and 3rd harmonics. For the plasma antenna with the coaxial coupler, the difference between the 1st and 2nd harmonics was increased by almost 6 dB, and between the 1st and the 3rd ones by almost 20 dB compared to the antenna excitation scheme through the electrode.","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"50 3","pages":"373 - 379"},"PeriodicalIF":0.9,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141060909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Microwave Discharge in High-Velocity Flows Initiated by a Half-Wave Antenna 由半波天线引发的高速流动中的微波放电

IF 0.9 4区物理与天体物理

Plasma Physics Reports Pub Date : 2024-05-16 DOI: 10.1134/S1063780X24600129

K. N. Kornev, A. A. Logunov, O. S. Surkont, T. R. Abushaev, A. L. Volynets, S. A. Dvinin

引用次数: 0

Use of Lithium Capillary Structures in Ohmic Discharges of T-10 Tokamak 在 T-10 托卡马克欧姆放电中使用锂毛细管结构

IF 0.9 4区物理与天体物理

Plasma Physics Reports Pub Date : 2024-05-16 DOI: 10.1134/S1063780X2460021X

V. A. Vershkov, D. V. Sarychev, D. A. Shelukhin, A. R. Nemets, S. V. Mirnov, I. E. Lyublinski, A. V. Vertkov, M. Yu. Zharkov

{"title":"Use of Lithium Capillary Structures in Ohmic Discharges of T-10 Tokamak","authors":"V. A. Vershkov, D. V. Sarychev, D. A. Shelukhin, A. R. Nemets, S. V. Mirnov, I. E. Lyublinski, A. V. Vertkov, M. Yu. Zharkov","doi":"10.1134/S1063780X2460021X","DOIUrl":"10.1134/S1063780X2460021X","url":null,"abstract":"The results of experiments at the T-10 tokamak using lithium capillary-porous structures are presented. It is shown that lithium sputtering under conditions of graphite diaphragms can significantly reduce deuterium recycling and the level of impurities in the plasma. At the same time, recycling increases significantly five discharges after the start of the day of the experiment, and the effect of reducing the level of impurities persists for 150–300 discharges. The results of using a capillary-porous structure with lithium filling as a movable rail diaphragm in the T-10 configuration with tungsten main diaphragms are presented. The introduction of a lithium diaphragm into the SOL region makes it possible to reduce recycling and obtain discharges with an effective plasma charge approaching unity. In this case, the effect increases as the lithium sputtered in the chamber is accumulated. It is shown experimentally that a capillary-porous structure with lithium filling can be used as a main diaphragm with longitudinal plasma heat fluxes up to 3.6 MW/m2. However, a necessary condition is the complete impregnation of the porous structure with lithium and the prevention of extrusion of lithium into the discharge as a result of the interaction of the current flowing to the diaphragm with the toroidal magnetic field. Experiments have shown that to obtain discharges with a small lithium admixture, a strong gas injection of deuterium or impurity is required to reduce the temperature of the plasma periphery and effective cooling of the diaphragm below 450°C. Otherwise, the diaphragm transfers into a strong evaporation mode with high lithium flows, which lead to a significant increase in the lithium concentration in the plasma. Strong evaporation reduces the heat inflow and stabilizes the diaphragm temperature.","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"50 3","pages":"283 - 309"},"PeriodicalIF":0.9,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S1063780X2460021X.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141061146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

About the Current Flow in a Discharge Tube with a Metal Section. Analysis of the Thermal Balance 关于带有金属部分的放电管中的电流。热平衡分析

IF 0.9 4区物理与天体物理

Plasma Physics Reports Pub Date : 2024-05-02 DOI: 10.1134/S1063780X23602018

A. V. Siasko, T. V. Gurkova, M. V. Balabas, Yu. B. Golubovskii

引用次数: 0

Investigation of the Poloidal Magnetic Flux at the PF-3 Plasma Focus within the Framework of the Program of Laboratory Simulation of Astrophysical Jets 在天体物理喷流实验室模拟计划框架内对 PF-3 等离子体焦点的极性磁通量的研究

IF 0.9 4区物理与天体物理

Plasma Physics Reports Pub Date : 2024-05-02 DOI: 10.1134/S1063780X23601943

S. K. H. Auluck, V. I. Krauz, V. V. Myalton, A. M. Kharrasov

{"title":"Investigation of the Poloidal Magnetic Flux at the PF-3 Plasma Focus within the Framework of the Program of Laboratory Simulation of Astrophysical Jets","authors":"S. K. H. Auluck, V. I. Krauz, V. V. Myalton, A. M. Kharrasov","doi":"10.1134/S1063780X23601943","DOIUrl":"10.1134/S1063780X23601943","url":null,"abstract":"Astrophysical jets are collimated plasma outflows observed in diverse astrophysical settings covering seven decades of spatial scale and twenty decades of power, which, nevertheless, share many common features. This similarity over wide range of scales indicates a common core of physics underlying this phenomenon, leading to considerable interest in observational, theoretical and numerical studies. Laboratory astrophysics experiments for simulating astrophysical jets are premised on this common core of physics responsible for multi-scale similarity of jets remaining valid down to laboratory spatial scales of millimeters. Jets formed after the disassembly of the non-cylindrical Z-pinch formed in a plasma focus installation have recently been subjects of observational studies. They offer an important complementarity to the main lines of investigations in two respects. Firstly, the multi-faceted role of gravity, radiation, nuclear reactions and related astrophysics is eliminated retaining only a rapid implosion of a compact plasma object in a magnetohydrodynamic environment as a common feature. Secondly, observations can be made using techniques of laboratory plasma diagnostics. In this paper, we report preliminary results regarding presence of poloidal magnetic flux associated with the jets lasting long after the pinch disassembly. This is significant in the context of uncertainty regarding the origin of poloidal magnetic field postulated in several MHD models of astrophysical jet phenomena. Evidence indicating presence of a radial component of electric field suggests existence of plasma rotation as well. These results suggest that more refined experiments can provide insights into the astrophysical jetting phenomena not available from observational astronomy techniques.","PeriodicalId":735,"journal":{"name":"Plasma Physics Reports","volume":"50 3","pages":"358 - 372"},"PeriodicalIF":0.9,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140881739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Collisional Mechanism of Expanding Wavenumbers Range of Weibel-Type Instability in Magnetoactive Plasma 磁作用等离子体中魏伯尔型不稳定性波数范围不断扩大的碰撞机制

IF 0.9 4区物理与天体物理

Plasma Physics Reports Pub Date : 2024-04-16 DOI: 10.1134/S1063780X23602067

N. A. Emelyanov, V. V. Kocharovsky

引用次数: 0

Analytical Theory of Reflection of Hydrogen Isotopes of Thermonuclear Energies from Construction Materials 建筑材料反射热核能源氢同位素的分析理论

IF 0.9 4区物理与天体物理

Plasma Physics Reports Pub Date : 2024-04-16 DOI: 10.1134/S1063780X2360202X

V. P. Afanas’ev, L. G. Lobanova

引用次数: 0

Electrical Discharge between a Metal Cathode and a Liquid Non-Metal Anode 金属阴极与液体非金属阳极之间的放电

IF 0.9 4区物理与天体物理

Plasma Physics Reports Pub Date : 2024-04-16 DOI: 10.1134/S1063780X2360192X

R. R. Kayumov, A. I. Kuputdinova, D. N. Mirkhanov, Al. F. Gaisin

引用次数: 0