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Demonstration via simulation of stable confinement of sheet electron beams using periodic magnetic focusing

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2 Author(s)
J. H. Booske ; Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA ; M. A. Basten

Using a two and one-half dimensional (two-dimensional for fields, three-dimensional for particle velocities) particle-in-cell (PIC) code we simulate the dynamics of a highly-elliptic sheet electron beam focused by a periodically-cusped-magnetic (PCM) field array. For edge-focusing, a periodic-quadrupole-magnetic (PQM) array is placed along the sides. Very high-space-charge, low-voltage beams may be focused in this way, without disruptive diocotron instability. The PCM-PQM hybrid array appears convenient for two-plane matching of the beam to minimize beam ripple in both transverse dimensions

Published in:

IEEE Transactions on Plasma Science  (Volume:27 ,  Issue: 1 )