Miniature plasma brightness standard for high-speed spectroscopy

Demidov, M. I.; Ogurtsova, N. N.; Podmoshenskii, I. V.; Shelemina, V. M.

doi:10.1007/bf00615879

Cited by 5 publications

(3 citation statements)

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“…arc at high-current density levels ( 2 104 A "-2) in short channels (low l/R) made of hydrocarbon materials, shows a line spectrum (rather than black-body continuum) with carbon v and VI lines particularly prominent (Demidov et a1 1971). The existence of carbon v lines indicates that the arc plasma temperature for this mode of operation to be 1-4 x l o 5 K. For such high temperatures and non-black-body conditions the predominant radial energy transfer mechanism is claimed to be thermal conduction, with a strong electronic component, rather than radiation (Demidov et al 1971). This interpretation is consistent with the reduced ablation and absence of bulk ablation observed during operation in the high-temperature regime.…”

Section: The Ablation Arc In Short Narrow Channels Operation Of the A...supporting

confidence: 59%

The physics of high-power arcs

Jones

Fang

1980

Rep. Prog. Phys.

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Recent progress in the physics of high-power arcs has been largely due to a blend of detailed experimental and theoretical investigations aimed at explaining the electrical behaviour of the discharge in terms of fundamental physical processes.I n the case of collision-dominated, high-pressure arcs the important role of radiative energy transfer, including strong self-absorption, has been established through the experimental and theoretical study of cylindrically symmetric, uncontaminated arc plasmas. As a result, an insight has been gained into the additional complications produced in naturally occurring high-pressure arcs by electrode vapour contamination and self-magnetically-propelled plasma flows. Application of the boundary layer integral method of aerodynamics in conjunction with extensive property measurements has enabled the higher-power dissipation capabilities of arcs in imposed axial flows to be related to flow acceleration and turbulent exchange processes. Integral methods have also given an insight into arc properties and behaviour in the presence of severe ablation of an arc-confining wall.The application of similarity theory based upon the conservation equations of fluid mechanics has produced good correlation of the properties of arcs in transverse flows and magnetic fields under a number of different operating conditions. Criteria defining stable arc operation have been derived using stability theory whilst axisymmetric instabilities of arcs in accelerating flows have been related to vortex production at the arc boundary.Although much detailed experimental and theoretical studies have also been made of arcs in vacuum, there remains a need for a general theoretical description. I n addition, despite agreement that cathode processes exert a strong influence upon vacuum arc properties, there is uncertainty concerning the proportion and spatial distributions of the various particle species emitted by the cathode. Nonetheless a qualitative appreciation of the processes governing the overall electrical characteristics for different current ranges has been achieved.

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Section: The Ablation Arc In Short Narrow Channels Operation Of the A...supporting

confidence: 59%

The physics of high-power arcs

Jones

Fang

1980

Rep. Prog. Phys.

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“…2 показано пространственное распределение температуры Т (К) в импульсной струе плазмы КРИС в условиях отсутствия воздействия внешнего магнитного поля B = 0. Результаты проведённых Уровень Т 23 14 500 22 14 000 21 13 500 20 11 439,3 19 9799,19 18 8500 17 8328,94 16 8000 15 7500 14 7000 13 6500 12 6000 11 5500 10 5000 9 4500 8 4000 7 3500 6 3000 5 2500 4 2000 3 1500 2 4 2,010 4 1,910 4 1,710 4 1,610 4 1,510 4 1,410 4 1,210 4 1,110 4 9,810 3 8,510 3 7,310 3 6,010 3 4,810 3 3,510 3 2,310 3 1,010 3 2,5 Т 1,8010 4 1,7110 4 1,6110 4 1,5210 4 1,4210 4 1,3310 4 1,2310 4 1,2110 4 1,1410 4 1,0510 4 9,7710 3 9,5210 3 8,8410 3 8,5810 3 7,6410…”

Section: результаты компьютерного исследования плазменного факела капunclassified

“…Импульсные струи плазмы часто находят применение в различных технических, научных приложениях и могут быть сформированы с помощью капиллярного разряда с испаряющейся стенкой (КРИС) [1][2][3][4][5][6]. Важным достоинством КРИС как источника интенсивного широкополосного излучения является возможность получения плазмы с высокими и хорошо воспроизводимыми термо-и газодинамическими (а значит и излучательными) характеристиками.…”

Section: Introductionunclassified

Numerical Simulation of Processes in a Pulsed Jet of a Capillary Discharge With Evaporating Wall

Kuzenov¹,

Frolko²,

Шумаев³

2018

PAST-TF

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Проведено численное моделирование плазмогазодинамических процессов и структуры факела капиллярного разряда с испаряющейся стенкой, предназначенного для импульсных термоядерных систем. Получены пространственные распределения температуры в струе такого разряда для разных моментов времени. Выполнена оценка влияния внешнего магнитного поля (напряжённость B = 2,5 Tл и B = 1,58 Tл) на элементы одиночной струи рассматриваемого капиллярного разряда. Ключевые слова: капиллярный разряд, контактная граница, перенос излучения, плазменные струи, ударная волна.

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