Design of a high current density cylindrical electron optics system | Zendy

Sun Fu-Yu | Zendy; Zhenhua Wu | Zendy; Kaichun Zhang | Zendy

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Design of a high current density cylindrical electron optics system

Author(s) -

Sun Fu-Yu,

Zhenhua Wu,

Kaichun Zhang

Publication year - 2010

Publication title -

acta physica sinica

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%.

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