Beam-plasma instability in charged plasma in the absence of ions

Дубинов, А. Е.; Petrik, Alexey G.; Kurkin, Semen A.; Frolov, Nikita S.; Короновский, А. А.; Hramov, Alexander E.

doi:10.1063/1.4945644

Cited by 33 publications

(2 citation statements)

References 38 publications

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“…Let 𝑓 𝑏 = 𝑛 𝑏0 /𝑛 𝑖 as the charge neutralization fraction, and 𝑓 𝑒 = 𝑛 𝑒 /𝑛 𝑖 as the fraction of trapped plasma electrons, when 𝑓 𝑒 = 1 − 𝑓 𝑏 , the system maintains charge neutrality. As the trapped plasma electrons in the drift tube will interact with the electron beam to cause a two-stream instability [18][19][20], the number of trapped electrons should be minimized. which requires 1 − 𝑓 𝑏 ≈ 0.…”

Section: Brief Summary Of the Theoretical Model For Beam Transportati...mentioning

confidence: 99%

Simulations of the Self-Focused Pseudospark-Sourced Electron Beam in a Background Ion Channel

Zhang¹,

Phelps

Ronald

et al. 2021

IEEE Access

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Using pseudospark discharge sourced electron beams for the generation of high-peak-power millimeter and terahertz radiation attracts increasing research interest in recent years. However, one of the crucially important and hitherto unanswered questions is "what is the upper-frequency limit at which millimeter-wave devices can be driven by pseudospark discharge sourced electron beams?". In this paper, we studied this question from the perspective of beam transportation in a plasma background, more specifically an ion channel using particle-in-cell simulations to find the limitations. The parameter ranges of the beam transportation with small oscillations in the beam diameter were investigated and summarized, through simulations of beam propagation in a large diameter drift tube with different ion densities, plasma electron densities, beam density distributions, and beam energies. The beam transportation in a small diameter beam tunnel was also simulated. It showed the maximum beam current with a small velocity spread that can be transported in the beam tunnel was determined by the diameter of the beam tunnel and the ion density. High injected current will cause significant beam loss and reduce the overall efficiency. The simulation results indicate a minimum diameter of the beam tunnel in a millimeter-wave circuit that can be effectively driven by a pseudospark-sourced electron beam. The equivalent upper limit in the operating frequency is about 400 GHz.

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Section: Brief Summary Of the Theoretical Model For Beam Transportati...mentioning

confidence: 99%

Simulations of the Self-Focused Pseudospark-Sourced Electron Beam in a Background Ion Channel

Zhang¹,

Phelps

Ronald

et al. 2021

IEEE Access

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show abstract

“…Afterwards, the squeezed states of beams were widely studied by means of particle-in-cell (PIC)-simulation regarding powerful microwave generators with a VC, [32][33][34] magnetrons, [35] microwave generators of a plasma-beam type, [36] generators of ultrashort current pulses, [37,38] collective ion accelerators, [19,39] multiply charged ion sources based on electron beam traps. [40][41][42][43][44] The squeezed state was experimentally studied in ref.…”

Section: Introductionmentioning

confidence: 99%

Particle‐in‐cell/Monte Carlo‐simulation of the discharge in helium initiated by a relativistic electron beam in the chamber with a magnetic mirror

Дубинов

Тараканов

2022

Contributions to Plasma Physics

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A gas discharge is simulated and numerically studied in the gaseous helium in the region of the squeezed state of a single tubular magnetized relativistic electron beam at its partial reflection from a magnetic mirror. The code based on the particle-in-cell/Monte Carlo method was used. The electron beam dynamics, time evolution of phase portraits of particles, physical parameters, and spatial-time characteristics of plasma were calculated. It is shown that dense plasma appears in the cavity under the action of an electron beam in the form of a thin-walled long cylinder of a large length; its electron concentration can be several units of 10 11 cm −3 . At the same time, it turned out that plasma is considerably inhomogeneous in length; its more dense part corresponds to the part of the squeezed state of a beam. The time dependence of the charge compensation of electrons on the helium atom concentration in the chamber was calculated. The dependence turned out to be decreasing since the rate of discharge development is increasing with the growth of the helium pressure in the cavity.

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Excitation of Surface Flute Waves in Electron Cyclotron Frequency Range by Relativistic Electron Beam Gyrating Along Large Larmor Orbits

Гірка

Thumm

2022

Surface Flute Waves in Plasmas

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Beam-plasma instability in charged plasma in the absence of ions

Cited by 33 publications

References 38 publications

Simulations of the Self-Focused Pseudospark-Sourced Electron Beam in a Background Ion Channel

Simulations of the Self-Focused Pseudospark-Sourced Electron Beam in a Background Ion Channel

Particle‐in‐cell/Monte Carlo‐simulation of the discharge in helium initiated by a relativistic electron beam in the chamber with a magnetic mirror

Excitation of Surface Flute Waves in Electron Cyclotron Frequency Range by Relativistic Electron Beam Gyrating Along Large Larmor Orbits

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