American Nuclear Society

Home / Publications / Journals / Fusion Science and Technology / Volume 46 / Number 2

Removal of Impurity Ions from Helical Devices by a Trapping/Detrapping Process

Oleksandr Yu. Antufyev, Alexander A. Shishkin

Fusion Science and Technology / Volume 46 / Number 2 / September 2004 / Pages 312-317

Technical Papers / Stellarators /

Heavy impurity ions can be removed from the toroidal magnetic trap in the helical magnetic field of a conventional torsatron or heliotron with the use of an alternating current (ac) electric field. The passing particles can be transformed into helically trapped ones and escape from the magnetic confinement volume by the drift of the particles in the inhomogeneous magnetic field. The frequency of the ac electric field is taken close to the bounce frequency in the helical magnetic field. The analysis is carried out on the basis of guiding center equations.

Questions or comments about the site? Contact the ANS Webmaster.