Research with plasma foci in countries of Asia, Africa, and Latin America

Дубинов, А. Е.; Fomicheva, Elena I.; Senilov, L. A.

doi:10.1007/s41614-020-0041-1

Cited by 10 publications

(6 citation statements)

References 344 publications

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“…Энергия нейтронов в осевом направлении, как правило, не превышает 2.9 MeV, в направлении, перпендикулярном оси, составляет 2.5−2.6 MeV [4,5]. Обширный обзор и библиография работ по исследованию генерации нейтронов и потоков заряженных частиц в плазмофокусных устройствах приводится в работе [6].…”

Section: Introductionunclassified

Генерация Узконаправленного Излучения Дд-Нейтронов В Плазмофокусном Разряде --- Открытие И Перспективы Исследования

Аблесимов¹,

Малькин²,

Пашарина³

2022

Журнал Технической Физики

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Analysis of the measurement results by scintillation detectors of the time dependence of the output of DD neutrons in a plasma-focus discharge indicates the generation of a narrowly directed neutron beam in the discharge. The quantitative characteristics of a narrowly directed neutron beam are estimated – the output of neutrons in the beam, the duration of generation, and the angular divergence of the beam. To estimate the beam parameters, the Monte Carlo simulation of the features of the time dependence of the signal of the scintillation detector in the conditions of a closed space in which the measurements were carried out was carried out.

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Section: Introductionunclassified

Генерация Узконаправленного Излучения Дд-Нейтронов В Плазмофокусном Разряде --- Открытие И Перспективы Исследования

Аблесимов¹,

Малькин²,

Пашарина³

2022

Журнал Технической Физики

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“…The neutron energy in the axial direction usually does not exceed 2.9 MeV, in the direction perpendicular to the axis is 2.5−2.6 MeV [4,5]. An extensive review and bibliography of works on the study of neutron generation and fluxes of charged particles in plasma-focused devices is given in [6].…”

Section: Introductionmentioning

confidence: 99%

Generation of narrowly focused radiation of neutrons in a plasma-focus discharge --- discovery and prospects of research

2022

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Analysis of the measurement results by scintillation detectors of the time dependence of the output of DD neutrons in a plasma-focus discharge indicates the generation of a narrowly directed neutron beam in the discharge. The quantitative characteristics of a narrowly directed neutron beam are estimated --- the output of neutrons in the beam, the duration of generation, and the angular divergence of the beam. To estimate the beam parameters, the Monte Carlo simulation of the features of the time dependence of the signal of the scintillation detector in the conditions of a closed space in which the measurements were carried out was carried out. Keywords: plasma focus, generation of DD neutrons, scintillation detectors, time-of-flight method, Monte Carlo method.

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“…The Dense Plasma Focus [1,2] is well-known as an inexpensive intense source of neutrons, fast ions, electrons and x-rays [2][3][4][5][6], a rich repository of exotic plasma phenomenology [2], a novel environment for synthesis of new materials [7] and a versatile educational tool for training young plasma physicists [8]. But at its most basic level, it is a plasma discharge powered by a capacitor bank.…”

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confidence: 99%

“…One can compare various labeled terms in (6) with the expression for power through the circuit elements defined as inductance, capacitance and resistance, whose geometrical parameters could be time-dependent.…”

mentioning

confidence: 99%

“…The difference between the term 2 1 p 2 I dL dt and term II in (6) would have to be accounted for by invoking an "anomalous impedance" -an impedance that has no analog in circuit theory. The "plasma capacitance" and related term IV in (6) would probably be numerically negligible in a circuit equation in comparison with the capacitance of the energy storage but could nonetheless have detectable effects such as oscillations of current and induced charges on nearby floating conductors.…”

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confidence: 99%

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On the representation of dense plasma focus as a circuit element

Auluck

2021

Physics of Plasmas

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Space propulsion is unique among many proposed applications of the Dense Plasma Focus in being critically dependent on the availability of a scaling theory that is well-grounded in physics, in conformity with existing experimental knowledge and applicable to experimentally untested configurations. This paper derives such a first-principles-based scaling theory and illustrates its application to a novel space propulsion concept, where the plasma focus sheath is employed as a power density amplifying mechanism to transport electric energy from a capacitive storage to a current-driven fusion load. For this purpose, a Generalized Plasma Focus problem is introduced and formulated. It concerns a finite, axisymmetric plasma, driven through a neutral gas at supersonic speed over distances much larger than its typical gradient scale length by its azimuthal magnetic field while remaining connected with its pulse power source through suitable boundaries. The Gratton-Vargas equation is rederived from the scaling properties of the equations governing plasma dynamics and solved for algebraically defined initial (insulator) and boundary (anode) surfaces. Scaling relations for a new space propulsion concept are derived. This consists of a modified plasma focus with a tapered anode that transports current from a pulsed power source to a consumable portion of the anode in the form of a hypodermic needle tube continuously extruded along the axis of the device. When the tube is filled with deuterium, the device may serve as a small-scale version of magnetized liner inertial fusion (MAGLIF) that could avoid failure of neutron yield scaling in a conventional plasma focus.

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Research with plasma foci in countries of Asia, Africa, and Latin America

Cited by 10 publications

References 344 publications

Генерация Узконаправленного Излучения Дд-Нейтронов В Плазмофокусном Разряде --- Открытие И Перспективы Исследования

Генерация Узконаправленного Излучения Дд-Нейтронов В Плазмофокусном Разряде --- Открытие И Перспективы Исследования

Generation of narrowly focused radiation of neutrons in a plasma-focus discharge --- discovery and prospects of research

On the representation of dense plasma focus as a circuit element

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