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Debye-scale Solitary Structures Measured in a Beam-plasma Laboratory Experiment : Volume 18, Issue 1 (25/01/2011)

By Lefebvre, B.

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Book Id: WPLBN0003983685
Format Type: PDF Article :
File Size: Pages 7
Reproduction Date: 2015

Title: Debye-scale Solitary Structures Measured in a Beam-plasma Laboratory Experiment : Volume 18, Issue 1 (25/01/2011)  
Author: Lefebvre, B.
Volume: Vol. 18, Issue 1
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2011
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Kintner, P., Pribyl, P., Gekelman, W., Pickett, J., Chen, L., Lefebvre, B., & Vincena, S. (2011). Debye-scale Solitary Structures Measured in a Beam-plasma Laboratory Experiment : Volume 18, Issue 1 (25/01/2011). Retrieved from http://hawaiilibrary.net/


Description
Description: Space Science Center, University of New Hampshire, Durham, NH 03824, USA. Solitary electrostatic pulses have been observed in numerous places of the magnetosphere such as the vicinity of reconnection current sheets, shocks or auroral current systems, and are often thought to be generated by energetic electron beams. We present results of a series of experiments conducted at the UCLA large plasma device (LAPD) where a suprathermal electron beam was injected parallel to a static magnetic field. Micro-probes with tips smaller than a Debye length enabled the detection of solitary pulses with positive electric potential and half-widths 4–25 Debye lengths (ΛDe), over a set of experiments with various beam energies, plasma densities and magnetic field strengths. The shape, scales and amplitudes of the structures are similar to those observed in space, and consistent with electron holes. The dependance of these properties on the experimental parameters is shown. The velocities of the solitary structures (1–3 background electron thermal velocities) are found to be much lower than the beam velocities, suggesting an excitation mechanism driven by parallel currents associated to the electron beam.

Summary
Debye-scale solitary structures measured in a beam-plasma laboratory experiment

Excerpt
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