Title :
Dynamics of space-charge dominated electron beams in crossed E×B-fields
Author_Institution :
Lebedev (P.N.) Phys. Inst., Moscow, Russia
Abstract :
Problems of nonlinear dynamics of space-charge dominated electron beams in crossed E×B-fields are discussed. The review of the results of computer simulations of an electron clouds formation due to nonlinear azimuthal instability inside magnetically isolated coaxial diodes (magnetron guns) under the condition of strong nonuniform secondary self-sustaining emission and pure thermionic emission is given. Emphasised is the dominant influence of a feedback on dynamics of electron beam modulation and on arising of a leakage current to an anode across an external magnetic field. A scheme of storage and capture of electron beams in crossed E×B-fields due to transient processes is proposed
Keywords :
electron accelerators; electron beams; electron guns; electron sources; high energy physics instrumentation computing; magnetrons; nonlinear dynamical systems; particle beam dynamics; particle beam stability; space charge; storage rings; thermionic electron emission; computer simulations; crossed E×B-fields; electron beam capture; electron beam modulation; electron beam storage; electron clouds formation; leakage current; magnetically isolated coaxial diodes; magnetron guns; nonlinear azimuthal instability; nonlinear dynamics; nonuniform secondary selfsustaining emission; space-charge dominated electron beams dynamics; thermionic emission; transient processes; Clouds; Coaxial components; Computer simulation; Diodes; Electron beams; Electron emission; Electron guns; Feedback; Magnetic modulators; Thermionic emission;
Conference_Titel :
Particle Accelerator Conference, 1999. Proceedings of the 1999
Conference_Location :
New York, NY
Print_ISBN :
0-7803-5573-3
DOI :
10.1109/PAC.1999.794238
