Space-charge limiting currents in magnetically focused intense relativistic beams with an ion channel

Journal Article · Fri Dec 15 04:00:00 EST 2006 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2402915· OSTI ID:20860467

Jianqing, Li; Yuanlong, Mo ^[1]

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1. School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu, 610054 (China)

The intense relativistic beam propagation through the drift tube filled with background plasma is investigated. The self-consistent differential equations, which describe the laminar-flow equilibria state in magnetically focused relativistic beams with an ion channel, are presented. By solving these equations using the Runge-Kutta method, the azimuthal velocity, the axial velocity, and the electron beam density, which are functions of radial position, can be calculated. Then the space-charge limiting current and the externally applied magnetic field can be obtained for solid beams and hollow beams. In the case of plasma fill, the axial velocity of the laminar flow is a nonuniform radial profile. The simulated results show that the background plasma can increase the space-charge limiting current, reduce the externally applied magnetic field, and improve the electron beam propagation through the drift tube.

• OSTI ID: 20860467
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 12 Vol. 13; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BEAM-PLASMA SYSTEMS
DIFFERENTIAL EQUATIONS
DRIFT TUBES
ELECTRIC CURRENTS
ELECTRON BEAMS
IONS
LAMINAR FLOW
MAGNETIC FIELDS
MAGNETOHYDRODYNAMICS
PLASMA DENSITY
RADIATION TRANSPORT
RELATIVISTIC PLASMA
RELATIVISTIC RANGE
RUNGE-KUTTA METHOD
SPACE CHARGE