A Review of the Beam Plasma Discharge

Smullin, Louis D.

doi:10.1007/978-94-009-8440-0_4

Cited by 11 publications

(3 citation statements)

References 23 publications

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“…Note that in the presence of fluxes of high-speed electrons in the plasma, the development of instabilities in plasma is possible [21]. As a result of the interaction of the plasma beam, additional heating of plasma bulk electrons is possible [22]. Regardless of the mechanism of electron heating, the maximum plasma density is determined by the balance of charged particle generation and their losses.…”

Section: Non-resonant Microwave Dischargesmentioning

confidence: 99%

Non-Resonant Microwave Discharge Start-Up in Heliotron J

Kovtun¹,

Nagasaki²,

Kobayashi³

et al. 2023

Problems of Atomic Science and Technology

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The non-resonant microwave discharge in strong magnetic fields was investigated in Heliotron J under the condition, ωce/ωMW > 1 (ωce and ωMW are the angular electron cyclotron frequency and the angular microwave frequency, respectively). Following the production of a non-resonant microwave discharge plasma, it undergoes several phases in sequence: breakdown and formation of pre-ionized plasma, increase in linear and nonlinear phases of plasma density, and quasi-stationary stage. Several modes of non-resonant microwave discharge were investigated. In the power-scanning mode in non-resonant microwave discharge, a higher plasma density than that in the constant-power mode is achieved. The maximum average density achieved in the experiments is substantially greater than the critical density for O-wave (ordinary waves) 7.45 ⸱1016 m -3 and can reach the value of 2.5⸱10 18 m -3. .

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Section: Non-resonant Microwave Dischargesmentioning

confidence: 99%

Non-Resonant Microwave Discharge Start-Up in Heliotron J

Kovtun¹,

Nagasaki²,

Kobayashi³

et al. 2023

Problems of Atomic Science and Technology

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“…Кроме того, необходимо провести измерение общих параметров плазмы с целью определения степени воздействия электронного пучка на плазму, так как, несмотря на обилие экспериментальных и теоретических работ [4,8] по изучению взаимодействия пучка и плазмы, многие эффекты ещё недостаточно изучены в диапазоне мощности пучков 0,1-100 МВт и квазистационарной (от 0,1 мс) и стационарной длительности.…”

Section: электронные пучки в открытых ловушкахunclassified

First Experiments on Electron Beam Injection Into the Gas-Dynamic Trap

Soldatkina¹,

Bagryansky²,

Zaytsev³

et al. 2012

PAST-TF

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Инжекция мощных электронных пучков вдоль магнитного поля является перспективным методом нагрева электронов плазмы и управления радиальным профилем потенциала в открытых ловушках. В работе представлены результаты первых экспериментов по инжекции электронного пучка в плазму установки Газодинамическая ловушка (ГДЛ) в ИЯФ СО РАН. Продемонстрирована возможность инжекции электронного пучка мощностью 400 кВт и энергией электронов 40 кэВ через магнитную пробку со степенью сжатия пучка до 120 в плазму. Особенность продольной инжекции пучка заключается в наличии встречного потока плазмы, который приводит к нестабильности работы электронной пушки. В работе определён диапазон параметров, в котором генератор пучка работал надёжно. Показано, что энергосодержание плазмы растёт линейно в течение всей длительности инжекции электронного пучка, не достигая стационарного уровня. При этом зафиксирован рост температуры электронов плазмы. Ключевые слова: магнитное удержание плазмы, открытая ловушка, электронный пучок.

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“…The beam-plasma discharge (BPD) instability [Getty and Smullin, 1963] has reemerged in recent years [Smullin, 1981;Bernstein et al, 1978] as a fundamental process to be considered by designers of space-vehicle-borne electron accelerator experiments. Because of concerns over vehicle neutralization during these experiments and an interest in further understanding of the BPD process [Cambou et al, 1975[Cambou et al, , 1978 a series of space simulation investigations of the BPD phenomenon was undertaken in the large vacuum chamber facility at the Johnson Space Center [Bernstein eta/., 1978[Bernstein eta/., , 1979Szuszczewicz et el., 1979Szuszczewicz et el., , 1982Papadopoulos, 1982;Anderson et al, 1982].…”

Section: Introductionmentioning

confidence: 99%

Electrostatic wave observation during a space simulation beam‐plasma discharge

Walker¹,

Szuszczewicz²

1985

J. Geophys. Res.

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We have studied ELF waves which were observed during beam‐plasma discharge in the large vacuum chamber at Johnson Space Center. Phase delays as a function of radius (obtained from cross‐correlation measurements of density fluctuations) along with measurements of frequency and plasma potential, density, and temperature have been compared to a zero‐order slab model of nonlocal azimuthal drift wave propagation. The inferred wave phase velocity in the plasma frame after Doppler correction is found to be near one half the electron diamagnetic drift velocity. Although our measurements do not uniquely define a propagation mode, a model of azimuthal drift wave propagation is found to be consistent with our observations.

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A Review of the Beam Plasma Discharge

Cited by 11 publications

References 23 publications

Non-Resonant Microwave Discharge Start-Up in Heliotron J

Non-Resonant Microwave Discharge Start-Up in Heliotron J

First Experiments on Electron Beam Injection Into the Gas-Dynamic Trap

Electrostatic wave observation during a space simulation beam‐plasma discharge

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