Space-charged-induced emittance growth in the transport of high-brightness electron beams

Conference · Sun Mar 01 00:00:00 EST 1987

OSTI ID:6643237

Jones, M E; Carlsten, B E

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.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6643237
• Report Number(s): LA-UR-87-415; CONF-870302-62; ON: DE87007460
• Resource Relation: Conference: Particle accelerator conference, Washington, DC, USA, 16 Mar 1987; Other Information: Paper copy only, copy does not permit microfiche production
• Country of Publication: United States
• Language: English

Related Subjects

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