Interferometric studies of the electron density dynamics at the periphery of a micropinch discharge

Kuznetsov, A. P.; Bashutin, O. A.; Byalkovskii, O. A.; Vovchenko, E. D.; Korotkov, K. E.; Savjolov, A. S.

doi:10.1134/s1063780x08030045

Cited by 10 publications

(8 citation statements)

References 4 publications

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“…3e). A similar structure was also detected in interferometric measurements of the electron density distribution at the periphery of the discharge plasma [12]. Such a tubular structure forms due to a decrease in the plasma conductivity in the micropinch region and switching of the current discharge to the plasma periphery.…”

Section: Discussionmentioning

confidence: 57%

“…Earlier interferometric measurements [12] have shown that the electron den sity in the plasma column before pinching is N e 1 0 18 -10 19 cm -3 . Estimates of the mean plasma elec tron temperature for 〈Z〉 ≈ 2 by means of the FLYCHK code [14] yield a value of T e = 3-4 eV.…”

Section: Discussionmentioning

confidence: 98%

“…The experiments were performed on the Zona 2 micropinch setup [12]. The inner electrode was a pointed rod with a diameter of 3 mm.…”

Section: Methodsmentioning

confidence: 99%

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Study of the contributions of the electrode materials to the plasma of a high-current vacuum spark

et al. 2012

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The contribution of the electrode material to the formation of the plasma of a low inductive high current vacuum spark and its influence on the process of discharge micropinching were studied using X ray spectroscopy and laser diagnostics. Electrode system configurations are determined in which the contribu tions of the materials of both electrodes to the plasma emitting X rays are comparable and in which the con tribution of one electrode is dominating. It is found that discharge pinching occurs primarily in the vapor of the pointed electrode independently of its polarity. The experimental results indicate the formation of a suprathermal electron beam in the micropinch region.

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Section: Discussionmentioning

confidence: 57%

Section: Discussionmentioning

confidence: 98%

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Study of the contributions of the electrode materials to the plasma of a high-current vacuum spark

et al. 2012

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“…The area electron density has been measured through twowavelength laser interferometer density diagnostics, which was described in details (Kuznetsov et al, 2008). The typical results of the discharging current and measured area electron density are shown in Figure 5.…”

Section: Experimental Setup and Progresses On Systemmentioning

confidence: 99%

Trends in heavy ion interaction with plasma

Zhao

Cheng

et al. 2012

Laser Part. Beams

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In this work, we review current trends in China to investigate beam plasma interaction phenomena. Recent progresses in China on low energy heavy ions and plasma interaction, ion beam-plasma interactions under the influences of magnetic fields, high energy heavy ion radiography through marginal range method, energy deposition of highly charged ions on surfaces and Raman spectroscopy of surfaces after irradiation of highly charged ions are presented.

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“…One of the interesting and little studied phenomena recorded in pulsed vacuum discharges is the ring structure of the beam of electrons and accelerated ions of the cathode material emitted by the discharge towards the anode. In recent years, these beams consisting of a central filament surrounded by concentric annular beams have been found in high-current vacuum spark [1,2] and accelerators of relativistic electrons with a metal cathode [3]. In these experiments, the diameter of the central filament and the coaxial surrounding rings was a few millimeters [1,2] or centimeters [3].…”

Section: Introductionmentioning

confidence: 99%

Ring structure of electron-ion beams ejected by a picosecond high-current electron accelerator

Baryshnikov¹,

Paperny²,

Chernyh³

2022

8th International Congress on Energy Fluxes and Radiation Effects

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The results of a study of the parameters of the radial structure of electron-ion beams emitted by a high-voltage vacuum discharge with an extremely high energy deposition rate > 5×1013 A/s are presented. An analysis of the structure of beam imprints on the irradiated anode foil, as well as traces of erosion on the crystalline substrate obtained by the authors earlier, showed that there are rings on a scale of tens of microns, and the energy of accelerated electrons in the central part of the beam is much higher than in the peripheral rings. A possible mechanism providing the observed beam structure is considered.

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Interferometric studies of the electron density dynamics at the periphery of a micropinch discharge

Cited by 10 publications

References 4 publications

Study of the contributions of the electrode materials to the plasma of a high-current vacuum spark

Study of the contributions of the electrode materials to the plasma of a high-current vacuum spark

Trends in heavy ion interaction with plasma

Ring structure of electron-ion beams ejected by a picosecond high-current electron accelerator

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