Title :
Demonstration via simulation of stable confinement of sheet electron beams using periodic magnetic focusing
Author :
Booske, John H. ; Basten, Mark A.
Author_Institution :
Dept. of Electr. & Comput. Eng., Wisconsin Univ., Madison, WI, USA
fDate :
2/1/1999 12:00:00 AM
Abstract :
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
Keywords :
electron beam focusing; electron beams; electron optics; microwave tubes; plasma devices; beam ripple; high power microwave devices; highly-elliptic sheet electron beam; low-voltage beams; particle-in-cell; periodic magnetic focusing; periodic-quadrupole-magnetic array; periodically-cusped-magnetic field array; sheet electron beams; stable confinement; two-plane matching; Circuits; Electron beams; Focusing; Magnetic confinement; Magnetic fields; Magnetic separation; Magnets; Numerical simulation; Phase change materials; Radio frequency;
Journal_Title :
Plasma Science, IEEE Transactions on
