Transition in electron transport in a cylindrical Hall thruster

Parker, J. B.; Raitses, Y.; Fisch, N. J.

doi:doi:10.1063/1.3486164

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Phenomenological theory of bistability in polariton diodes

Polariton diodes have been recently shown to exhibit pronounced bistability induced by the control of the light-matter coupling via an external bias and optical pumping [ D. Bajoni, E. Semenova, A. Lemaître, S. Bouchoule, E. Wertz, P. Senellart, S. Barbay, R. Kuszelewicz, and J. Bloch, Phys. Rev. Lett. 101, 266402 (2008)] . In the present paper, we detail the phenomenological theory developed to describe the observed hysteresis cycles and present additional experimental data confirming the vali...

Electron-beam generation in a wide-aperture open gas discharge: A comparative study for different inert gases

In the present study, electron-beam generation by open discharges was examined. The study was performed at gas pressures up to 20 Torr, and covered all inert gases. At voltages up to 8 kV, electron-beam currents up to 1600 A with current density ∼ 130 A/cm2 and a beam generation efficiency in excess of 93% were obtained. The production of electrons from cold cathode was concluded to be of photoemissive nature, enabling the production of high-intensity electron beams in any noble gas or in a mi...

Through the use of high-speed camera and Langmuir probe measurements in a cylindrical Hall thruster, we report the discovery of a rotating spoke of increased plasma density and light emission which correlates with increased electron transport across the magnetic field. As cathode electron emission is increased, a sharp transition occurs where the spoke disappears and electron transport decreases. This suggests that a significant fraction of the electron current might be directed through the spoke.

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KEYWORDS and PACS

Keywords

Langmuir probes, plasma density, plasma light propagation, plasma magnetohydrodynamics, plasma transport processes

PACS

52.30.Cv

Magnetohydrodynamics (including electron magnetohydrodynamics)
52.25.Fi

Transport properties
52.25.Tx

Emission, absorption, and scattering of particles
52.70.Ds

Electric and magnetic measurements
52.38.Dx

Laser light absorption in plasmas (collisional, parametric, etc.)

ARTICLE DATA

Digital Object Identifier

http://dx.doi.org/10.1063/1.3486164

PUBLICATION DATA

ISSN

0003-6951 (print)

1077-3118 (online)

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American Institute of Physics

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