Mixed Pierce-two-stream instability development in an extraction system of a negative ion source

Barminova, H. Y.; Chikhachev, A. S.

doi:10.1063/1.4935642

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…magnetized dusty plasmas (Rosenberg & Shukla 2004; Shukla et al. 2008), auroral-acceleration-zone plasmas (Muschietti & Roth 2008), complex plasmas with non-Maxwellian ions (Kählert 2015; Quest, Rosenberg & Kercher 2017), negative ion source plasmas (Barminova & Chikhachev 2016; Kumar & Mathew 2017), electron–positron–ion plasmas (Saleem & Khan 2005) and ion beam propagation in inertial fusion plasmas (Tokluoglu et al. 2018).…”

Section: Introductionmentioning

confidence: 99%

Stability of different plasma sheaths near a dielectric wall with secondary electron emission

et al. 2019

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The linear theory stability of different collisionless plasma sheath structures, including the classic sheath, inverse sheath and space-charge limited (SCL) sheath, is investigated as a typical eigenvalue problem. The three background plasma sheaths formed between a Maxwellian plasma source and a dielectric wall with a fully self-consistent secondary electron emission condition are solved by recent developed 1D3V (one-dimensional space and three-dimensional velocities), steady-state, collisionless kinetic sheath model, within a wide range of Maxwellian plasma electron temperature $T_{e}$ . Then, the eigenvalue equations of sheath plasma fluctuations through the three sheaths are numerically solved, and the corresponding damping and growth rates $\unicode[STIX]{x1D6FE}$ are found: (i) under the classic sheath structure (i.e. $T_{e}<T_{ec}$ (the first threshold)), there are three damping solutions (i.e. $\unicode[STIX]{x1D6FE}_{1}$ , $\unicode[STIX]{x1D6FE}_{2}$ and $\unicode[STIX]{x1D6FE}_{3}$ , $0>\unicode[STIX]{x1D6FE}_{1}>\unicode[STIX]{x1D6FE}_{2}>\unicode[STIX]{x1D6FE}_{3}$ ) for most cases, but there is only one growth-rate solution $\unicode[STIX]{x1D6FE}$ when $T_{e}\rightarrow T_{ec}$ due to the inhomogeneity of sheath being very weak; (ii) under the inverse sheath structure, which arises when $T_{e}>T_{ec}$ , there are no background ions in the sheath so that the fluctuations are stable; (iii) under the SCL sheath conditions (i.e. $T_{e}\geqslant T_{e\text{SCL}}$ , the second threshold), the obvious ion streaming through the sheath region again emerges and the three damping solutions are again found.

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Section: Introductionmentioning

confidence: 99%

Stability of different plasma sheaths near a dielectric wall with secondary electron emission

et al. 2019

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Oscillatory instability development in extraction system of a negative ion source

Barminova

Chikhachev

2015

Review of Scientific Instruments

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Conditions of oscillatory instability development in the extraction system of a negative hydrogen ion source based on a volume-produced plasma are studied. Such an ion source is characterized by the presence of the parent gas in the extraction system due to the leakage from the gas-discharge chamber. The secondary electrons in the area of the ion-optical system become the reason of oscillation appearance and possible beam current modulation. Analytically the range of the stable beam propagation is found. The instability increment is shown to be rather small. Maximum increment of the oscillations corresponds to the beam velocity equal to the thermal velocity of plasma electrons. The group velocity of the oscillations is close to the beam velocity so the oscillations are convective. Simulation of the low energy beam propagation is performed in COMSOL Multiphysics, the beam current modulation being observed.

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Erratum: “Mixed Pierce-two-stream instability development in an extraction system of a negative ion source” [Rev. Sci. Instrum. 87, 02A509 (2016)]

Barminova

Chikhachev

2016

Review of Scientific Instruments

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Mixed Pierce-two-stream instability development in an extraction system of a negative ion source

Cited by 3 publications

References 3 publications

Stability of different plasma sheaths near a dielectric wall with secondary electron emission

Stability of different plasma sheaths near a dielectric wall with secondary electron emission

Oscillatory instability development in extraction system of a negative ion source

Erratum: “Mixed Pierce-two-stream instability development in an extraction system of a negative ion source” [Rev. Sci. Instrum. 87, 02A509 (2016)]

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