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  4. Diagnostic Techniques for Measuring Suprathermal Electron Dynamics in Plasmas
 
conference paper

Diagnostic Techniques for Measuring Suprathermal Electron Dynamics in Plasmas

Coda, S.  
2008
Review of scientific instruments
HTPD-17, 17th High-Temperature Plasma Diagnostics Conference

Plasmas, both in the laboratory and in space, are often not in thermodynamic equilibrium, and the plasma electron distribution function is accordingly non-Maxwellian. Suprathermal electron tails can be generated by external drives, such as rf waves and electric fields, or internal ones, such as instabilities and magnetic reconnection. The variety and importance of the phenomena in which suprathermal electrons play a significant role explains an enduring interest in diagnostic techniques to investigate their properties and dynamics. X-ray bremsstrahlung emission has been studied in hot magnetized plasmas for well over two decades, flanked progressively by electron-cyclotron emission in geometries favoring the high-energy end of the distribution function (high-field-side, vertical, oblique emission), by electron-cyclotron absorption, by spectroscopic techniques, and at lower temperatures, by Langmuir probes and electrostatic analyzers. Continuous progress in detector technology and in measurement and analysis techniques, increasingly sophisticated layouts (multichannel and tomographic systems, imaging geometries), and highly controlled suprathermal generation methods (e.g., perturbative rf modulation) have all been brought to bear in recent years on an increasingly detailed, although far from complete, understanding of suprathermal electron dynamics.

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Type
conference paper
DOI
10.1063/1.2966599
Web of Science ID

WOS:000260573500258

Author(s)
Coda, S.  
Date Issued

2008

Publisher

American Institute of Physics

Published in
Review of scientific instruments
Volume

79

Start page

10F501

Note

Invited paper

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
CRPP  
SPC  
Event nameEvent placeEvent date
HTPD-17, 17th High-Temperature Plasma Diagnostics Conference

Albuquerque, NM, USA

May 11-15, 2008

Available on Infoscience
March 24, 2009
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/36308
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