Space-charged-induced emittance growth in the transport of high-brightness electron beams
The emittance induced by space charge in a drifting beam of finite length has been investigated, and a scaling law has been obtained from simple considerations of the different rates of expansion of different portions of the beam. The scaling law predicts the initial rate of emittance growth, before the beam shape has distorted significantly, and thus represents an upper bound on the rate of emittance increase. This scaling law has been substantiated by particle-in-cell simulation and the dependence on geometric factors evaluated for specific choices of the beam profile. For long, axially nonuniform beams, the geometric factors have been evaluated explicitly for Gaussian profiles, and other shapes.
- Publication Date:
- OSTI Identifier:
- Report Number(s):
- LA-UR-87-415; CONF-870302-62
- DOE Contract Number:
- Resource Type:
- Resource Relation:
- Conference: Particle accelerator conference, Washington, DC, USA, 16 Mar 1987; Other Information: Paper copy only, copy does not permit microfiche production
- Research Org:
- Los Alamos National Lab., NM (USA)
- Country of Publication:
- United States
- 43 PARTICLE ACCELERATORS; BEAM EMITTANCE; SCALING LAWS; ELECTRON BEAMS; SPACE CHARGE; ANALYTICAL SOLUTION; BRIGHTNESS; COMPUTERIZED SIMULATION; BEAMS; LEPTON BEAMS; OPTICAL PROPERTIES; PARTICLE BEAMS; PHYSICAL PROPERTIES; SIMULATION 430200* -- Particle Accelerators-- Beam Dynamics, Field Calculations, & Ion Optics
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