The Rotation of Ions and Neutrals in a Cylindrical Magnetized Hollow Cathode Argon Arc

Timmermans, CJ; Lunk, A.; Schram, D.C.

doi:10.1002/ctpp.19810210206

Cited by 20 publications

(10 citation statements)

References 4 publications

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“…This has been verified experimentally [15], A second approach is, to assume that the azimuthal velocity is mainly of ELB origin. If also for the electrostatic potential a Gaussian profile is assumed:…”

Section: The Comparison With Measured Diffusion and The Contribution mentioning

confidence: 75%

On the Pressure Balance and Plasma Transport in Cylindrical Magnetized Arcs

Schram

Mullen

Pots

et al. 1983

Zeitschrift Für Naturforschung A

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Magnetized current-carrying plasmas exhibit usually significant Ex B rotation velocities which often approach the ion thermal velocity. It is shown both experimentally and theoretically that this rotation in combination with inertia, viscosity and friction leads to an important reduction of the radial transport. If the radial electric field component is directed inward an inwardly directed force on the ions is set up. On the other hand, turbulence leads to enhanced transport especially at higher values of the electron Hall parameter. Also this effect is observed in this experiment and is shown to be in accordance with measured turbulence levels.

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Section: The Comparison With Measured Diffusion and The Contribution mentioning

confidence: 75%

On the Pressure Balance and Plasma Transport in Cylindrical Magnetized Arcs

Schram

Mullen

Pots

et al. 1983

Zeitschrift Für Naturforschung A

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“…A FP interferometer is a very narrow bandwidth optical filter. It is often used to examine the detailed structure of spectral lines [6,7]. Figure 1 presents a schematic view of the complete FP system.…”

Section: Methodsmentioning

confidence: 99%

A Fabry–Pérot spectroscopy study on ion flow features in a Hall effect thruster

Gawron¹,

Mazouffre²,

Boniface

2006

Plasma Sources Sci. Technol.

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The exit velocity of singly-charged xenon ions is determined by means of Fabry-Pérot interferometry at the exhaust of a high-power PPSX000 Hall effect thruster by analysing the Doppler shifted spectral profile of the 541.91 nm Xe + ion line. A technique combining numerical simulations and CCD imaging is used to re-adjust the obtained velocity profiles in space, as this information is lost due to the accumulation of light along the line of sight. The applied voltage is varied from 200 to 900 V, and the xenon mass flow rate is varied from 5 mg s −1 to 15 mg s −1 to investigate the evolution of both the ion speed and the distribution of the accelerating potential over a broad power range. The goal of these measurements is twofold, namely, collecting reliable and extensive data and looking for a simple correlation between thruster parameters and corresponding accelerating potential distributions. Furthermore, this study reveals the presence of low velocity ions in the vicinity of the thruster channel exhaust.

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“…The existence of such ''cold'' and ''hot'' neutrals has previously been observed in many discharges, including magnetized hollow cathode. 22 A hot neutrals population can be expected physically as a consequence of charge-exchange ͑CX͒ processes between hot ions and cold neutrals, and will be discussed in more detail in Sec. IV D 4.…”

Section: B Fabry-perot Interferometermentioning

confidence: 99%

Comparisons of experimental measurements and two-dimensional plasma-fluid numerical simulations of a magnetized plasma column

Chiu

Cohen

1996

Physics of Plasmas

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The density, the electron, ion, and neutral temperatures in dense ͑n e Ͼ10 13 cm Ϫ3 ͒ and cool ͑T e Ͻ8 eV͒ magnetized helium plasma columns submerged in a cool neutral gas ͑n 0 ϳ3ϫ10 15 cm Ϫ3 ͒ environment have been measured. These plasmas, of similar collisionality to those expected in the scrape-off layer of ITER ͑International Thermonuclear Experimental Reactor͒ ͓R. Parker, Contrib. Plasma Phys. 34, 422 ͑1994͔͒, are found to obey the low-recycling behavior of approximate plasma pressure balance along the column axis. Density decreases by a factor of about 2 and T e remains isothermal. Computer simulations using the B2 ͓R. Schneider et al., 810 ͑1992͔͒ plasma-fluid code have been performed and are in good agreement with experimental results. Measured ion temperatures are consistent with classical energy transfer from the electrons. Neutrals within the plasma are heated by elastic and charge-exchange collisions. This set of measurements represents the most detailed comparisons between experimental results and B2 predictions.

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The Rotation of Ions and Neutrals in a Cylindrical Magnetized Hollow Cathode Argon Arc

Abstract: In a magnetized hollow cathode arc rotational velocities of ions and neutrals and their temperatures were measured in axial and radial dependence. In comparison with theory experimental results give a detailed analysis of radial transport phenomena.

Cited by 20 publications

References 4 publications

On the Pressure Balance and Plasma Transport in Cylindrical Magnetized Arcs

On the Pressure Balance and Plasma Transport in Cylindrical Magnetized Arcs

A Fabry–Pérot spectroscopy study on ion flow features in a Hall effect thruster

Comparisons of experimental measurements and two-dimensional plasma-fluid numerical simulations of a magnetized plasma column

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