The <i>K</i>-shell radiation of a double gas puff 
<i>z</i>-pinch with an axial magnetic field

Chaikovsky, S. A.; Labetsky, A. Yu.; Oreshkin, V. I.; Shishlov, A. V.; Baksht, R. B.; Fedunin, A. V.; Rousskikh, A. G.

doi:10.1017/s0263034603212143

Cited by 36 publications

(13 citation statements)

References 13 publications

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“…In this case, only the magnetic diffusion mechanism is operative. Similar separate shell implosions were observed in experiments with double shell neon and argon z-pinches [4,5]. Figure 3 shows two streak camera images, which were taken in shots with different inner shell masses [4].…”

Section: Resultssupporting

confidence: 69%

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Simulation of azimuthal magnetic field diffusion in double shell Z-pinches

Chaikovsky

Shishlov

2005

Plasma Devices and Operations

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This paper presents the results of a simple simulation of the azimuthal magnetic field diffusion in an imploding double shell z-pinch. To calculate the currents through the inner and outer shells, circuit equations are used which take into account the inductances and resistances of the shells and their mutual inductance. As a first approximation, the shell resistance was assumed to be independent of time. The simulation predictions and their comparison with some experimental data are discussed.

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Section: Resultssupporting

confidence: 69%

“…r o , r i -the outer and inner shell radii, respectively, v o , v i -the outer and inner shell velocities, respectively. K-shell yield because it implodes from the initial radius of 40 mm [4,5] and is subject to R-T instabilities.…”

Section: Resultsmentioning

confidence: 99%

Simulation of azimuthal magnetic field diffusion in double shell Z-pinches

Chaikovsky

Shishlov

2005

Plasma Devices and Operations

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“…Z-пинч представляет собой электрический разряд в плазме, который сжимается под действием магнитного давления, создаваемым собственным током [1][2][3][4]. Ти-пичным для Z-пинчей является образование " горячих точек", которые формируются как результат развития крупномасштабных магнитогидродинамическиx неустой-чивостей [1,[5][6][7].…”

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Кулоновский Взрыв "Горячей Точки" Микропинчей

Орешкин¹,

Орешкин²

2017

Журнал Технической Физики

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Показано, что генерация жесткого рентгеновского излучения, электронного пучка и ионов с большой энергией, которые регистрируются в экспериментах по сжатию пинчей, может быть связана с кулоновским взрывом " горячей точки" в микропинче, которая формируется за счет вытекания вещества. По мере вытекания температура плазмы " горячей точки" возрастает, и в ней возникают условия для перехода электронов в режим непрерывного ускорения. Уход убегающих электронов из области " горячей точки" приводит к созданию в ней положительного объемного заряда и затем к кулоновскому взрыву. Oпределены условия перехода электронов в режим непрерывного ускорения и получены оценки кинетической энергии ионов при кулоновском взрыве.

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“…The runaway of electrons from the hot spot region results in the buildup of positive space charge in this region followed by a Coulomb explosion. The conditions for the hot spot plasma electrons to become continuously accelerated have been revealed and estimates have been obtained for the kinetic energy of the ions generated by the Coulomb explosion.A Z pinch is an electrical discharge in plasma, which is compressed under the action of the magnetic pressure produced by the intrinsic discharge current [1][2][3][4][5][6][7]. Typical of Z pinches is the formation of hot spots due to the development of large-scale MHD instabilities [1,2,8-10].…”

mentioning

confidence: 99%

“…A Z pinch is an electrical discharge in plasma, which is compressed under the action of the magnetic pressure produced by the intrinsic discharge current [1][2][3][4][5][6][7]. Typical of Z pinches is the formation of hot spots due to the development of large-scale MHD instabilities [1,2,8-10].…”

mentioning

confidence: 99%

Coulomb explosion of “hot spot”

Oreshkin

Chaikovsky

et al. 2016

Physics of Plasmas

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The study presented in this paper has shown that the generation of hard x rays and highenergy ions, which are detected in pinch implosion experiments, may be associated with the Coulomb explosion of the hot spot that is formed due to the outflow of the material from the pinch cross point. During the process of material outflow, the temperature of the hot spot plasma increases, and conditions arise for the plasma electrons to become continuously accelerated. The runaway of electrons from the hot spot region results in the buildup of positive space charge in this region followed by a Coulomb explosion. The conditions for the hot spot plasma electrons to become continuously accelerated have been revealed and estimates have been obtained for the kinetic energy of the ions generated by the Coulomb explosion.A Z pinch is an electrical discharge in plasma, which is compressed under the action of the magnetic pressure produced by the intrinsic discharge current [1][2][3][4][5][6][7]. Typical of Z pinches is the formation of hot spots due to the development of large-scale MHD instabilities [1,2,8-10].The discharge plasma column is deformed during compression, which is accompanied by the formation of necks smaller in radius than the main column. The magnetic pressure in the neck region increases, resulting, first, in faster compression and, second, in material outflow from the neck region in the axial direction. The final stage of the necking is a hot spot.Apparently, the axial jets were first detected in an experimental study [11] where the process of compression of deuterium pinches was investigated. As these jets were accounted for by an increase in neutron yield, the authors of Ref.[11] proposed a "noncylindrical Z pinch" in which the formation of the hot spot was predetermined by the geometry of the discharge.Subsequently, this configuration was called a plasma focus [12,13]. In subsequent experiments on a deuterium plasma focus at currents of about 1 MA, electron beams, hard x rays, and "epithermal" deuterons with energies up to 8 MeV were detected [14]. Even more energetic deuterons with energies of several tens of megaelectron-volts were detected in experiments with deuterium liners imploded at a current of 2.7 MA [15]. To explain the generation of high-energy ions and hard x rays, the so-called "target" mechanism was proposed [16]. It is assumed that in the final stage of formation of the hot spot, displacement currents occur that generate strong electric fields in which charged particles are accelerated.

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The K-shell radiation of a double gas puff z-pinch with an axial magnetic field

Cited by 36 publications

References 13 publications

Simulation of azimuthal magnetic field diffusion in double shell Z-pinches

Simulation of azimuthal magnetic field diffusion in double shell Z-pinches

Кулоновский Взрыв "Горячей Точки" Микропинчей

Coulomb explosion of “hot spot”

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