Title :
Confinement criterion for a finite sized bunched beam
Author :
Chen, C. ; Hess, M.
Author_Institution :
Plasma Sci. & Fusion Center, MIT, Cambridge, MA, USA
Abstract :
Summary form only given. A confinement criterion for a finite sized azimuthally symmetric relativistic bunched electron beam propagating through a perfectly conducting cylindrical pipe with a slight off-axis displacement while in the presence of either a uniform or periodic solenoidal field is studied. We compute the center-of-mass force on each off-axis beam bunch due to the induced surface charges on the pipe using a Green´s function technique. By analyzing the center-of-mass dynamics of each bunch due to magnetic focusing and its interaction with the pipe, a space-charge limit for beam confinement is derived. A comparison of the theory to high-current periodic permanent magnet (PPM) klystron experiments is established.
Keywords :
Green´s function methods; particle beam bunching; particle beam dynamics; plasma simulation; plasma-beam interactions; relativistic electron beams; space charge; Green function technique; azimuthally symmetric relativistic bunched electron beam propagation; center of mass dynamics; conducting cylindrical pipe; electron beam confinement; magnetic focusing; off-axis beam bunch; periodic permanent magnet klystron experiments; solenoidal field; space charge limit; surface charges; Critical current; Electron beams; Klystrons; Magnetic analysis; Magnetic confinement; Magnetic liquids; Nuclear and plasma sciences; Particle beams; Permanent magnets; Plasma confinement;
Conference_Titel :
Plasma Science, 2004. ICOPS 2004. IEEE Conference Record - Abstracts. The 31st IEEE International Conference on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-8334-6
DOI :
10.1109/PLASMA.2004.1339931
