Open AccessDesign of a high current density cylindrical electron optics system
Author(s) -
Sun Fu-Yu,
Zhenhua Wang,
Kaichun Zhang
Publication year - 2010
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.59.1721
Subject(s) - physics , electron gun , beam (structure) , optics , magnetic field , space charge , current (fluid) , current density , cathode ray , electron , electron optics , magnetic mirror , computational physics , quantum mechanics , thermodynamics
A high current density cylindrical electron optics system is designed for extended interaction oscillator, including the design of electron gun and focusing magnetic field. To obtain good beam properties, a theory of ideal circular beam focusing is used in design. The focusing magnetic field is calculated by balancing the radial forces. CST PARTICLE STUDIO simulation under space-charge-limited emission model shows good beam qualities with a parallel beam flow throughout the gun and interaction sections. The simulation result is in good agreement with design theory, the beam mean current density attains 244 A/cm2, fill factor 767%, beam transmission 100%.