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Article Dans Une Revue Physics of Plasmas Année : 2012

Physics of a magnetic filter for negative ion sources. II. E × B drift through the filter in a real geometry

J. Claustre
  • Fonction : Auteur
B. Chaudhury

Résumé

The physics of a magnetic filter under conditions similar to those of the negative ion source for the ITER neutral beam injector is analyzed with the help of a two-dimensional particle-in-cell Monte Carlo Collisions model. A detailed analysis of the different terms of the electron momentum equations shows how diamagnetic and drift currents can be dominant in different regions of the filter. Electron transport through the filter is due to an E × B drift current on one side of the chamber induced by the presence of the chamber walls perpendicular to the electron diamagnetic current. The filter design of the ITER negative ion source, which does not allow a closed electron diamagnetic current, induces an asymmetry of the plasma that is analyzed with the particle model. It is shown that electron transport through the filter in this geometry is very different from the transport in an ideal, one-dimensional magnetic filter often considered in the literature and described in detail in the companion paper.
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Dates et versions

hal-03808257 , version 1 (10-10-2022)

Identifiants

Citer

Jean Pierre Boeuf, J. Claustre, B. Chaudhury, G. Fubiani. Physics of a magnetic filter for negative ion sources. II. E × B drift through the filter in a real geometry. Physics of Plasmas, 2012, 19 (11), pp.113510. ⟨10.1063/1.4768804⟩. ⟨hal-03808257⟩
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