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Measurement of the Electron Distribution Function in the Loss Cone of an ECR‐discharge by Using a Double Retarding Field Analyzer
Author(s) -
Meyer D.,
Petriconi F.,
Wiesemann K.,
Bolshukhin D.,
Vinogradov I.
Publication year - 1996
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.19960360115
Subject(s) - spectrum analyzer , electron cyclotron resonance , plasma , atomic physics , electron , distribution function , kinetic energy , magnetic mirror , cone (formal languages) , materials science , exponential function , electron temperature , plasma diagnostics , physics , optics , nuclear physics , classical mechanics , mathematical analysis , mathematics , quantum mechanics , algorithm , computer science
A double retarding field analyzer (DRA) was used for measuring electron distribution functions (EDFs) in the loss cone of an electron‐cyclotron‐resonance (ECR) discharge run in mixtures of He and N 2 . By integrating along ϵ = const lines, where ϵ = E ‖ + E ⟂ is the kinetic energy, the true electron energy distribution function F (ϵ) in the loss cone of the ECR discharge was determined. The shape of F (ϵ) transforms from an exponential functions to a power law when changing plasma parameters like mixture ratio, total pressure and mirror ratio.