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Performance of a Floating Hairpin Probe in Strongly Magnetized Plasma
Author(s) -
Karkari S. K.,
Gogna G. S.,
Boilson D.,
Turner M. M.,
Simonin A.
Publication year - 2010
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.201010153
Subject(s) - langmuir probe , plasma , electron density , atomic physics , ion , electron cyclotron resonance , resonance (particle physics) , electron , highly charged ion , planar , plasma parameters , electron temperature , magnetic field , range (aeronautics) , physics , plasma diagnostics , materials science , plasma oscillation , ion source , nuclear physics , quantum mechanics , computer graphics (images) , computer science , composite material
This paper investigates the application of a floating hairpin probe for measuring the electron density in magnetized plasma. The magnetic field is systematically varied over a wide range (0.01 – 0.15 T) and its influence on the probes resonance frequency is studied. The resonance frequency in plasma displays a negative shift when the electron cyclotron frequency becomes comparable with the resonance frequency in vacuum. A general formula for calculating the electron number density in magnetized plasma is hence obtained and the formula is experimentally validated. Comparison of the electron density using the improved formula shows very good agreement with the positive ion density measured by a planar Langmuir probe in the Kamaboko‐III negative ion source (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)