Analytical and numerical studies of foilless diodes

Journal Article · Sat Aug 01 04:00:00 EDT 1981 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.329455· OSTI ID:6301994

Jones, M E; Mostrom, M A; Thode, L E

The generation of intense annular beams by foilless diodes is studied through analytic equilibrium models and particle-in-cell simulation. In the high-voltage regime, the foilless diode operates below the space-charge limit and the impedance is nearly independent of the voltage. The current density is proportional to the current and to the square of the external magnetic field. From a kinetic theory equilibrium model, the beam scattering angle is found to be inversely proportional to the diode voltage, external magnetic field strength, and cathode radius. The predicted scaling is in good agreement with the simulation results. Criteria for adiabatic expansion and cooling of the beam, supported by simulation results, have also been considered.

• Research Organization: Intense Particle Beam Theory Group, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6301994
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 52:8; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420800* -- Engineering-- Electronic Circuits & Devices-- (-1989)
ADIABATIC PROCESSES
ANNULAR SPACE
BEAMS
CATHODES
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
CONFIGURATION
CURRENT DENSITY
CURRENTS
DATA
DIODE TUBES
ELECTRIC CURRENTS
ELECTRODES
ELECTRON BEAMS
ELECTRON TUBES
EQUATIONS
EQUILIBRIUM
FOILS
IMPEDANCE
INFORMATION
KINETIC EQUATIONS
LEPTON BEAMS
MAGNETIC FIELDS
MATHEMATICAL MODELS
NUMERICAL DATA
PARTICLE BEAMS
SCALING LAWS
SCATTERING
SIMULATION
SPACE
SPACE CHARGE
THEORETICAL DATA