Title :
Electrostatic time-domain PIC simulations of RF density-modulated electron sources with MICHELLE
Author :
Petillo, John J. ; Kostas, Chris ; Panagos, Dimitrios ; Ovtchinnikov, Serguei ; Burke, Alex ; Antonsen, Thomas M., Jr. ; Wright, Edward L. ; Nguyen, Khanh T. ; Nelson, Eric ; Held, Ben L. ; DeFord, John F. ; Jensen, Kevin L. ; Pasour, John A. ; Levush, Ba
Author_Institution :
SAIC, Billerica, MA, USA
Abstract :
There is a significant level of effort by SAIC and BWR, funded by ONR & JTO, to enhance the three dimensional (3D) finite-element (FE) electrostatic time-domain (ESTD) particle-in-cell (PIC) code MICHELLE to provide modeling and simulation of the interaction of electron emission sources in the presence of electromagnetic cavity fields. These enhancements have direct importance to the free-electron laser (FEL) based high-energy laser community, providing the capability of modeling advanced photo-emission RF electron guns and the input cavity of high-power UHF inductive output tubes (IOT), both of which are needed for the FEL injector. We will discuss these code modifications, enhancements to our emission models, recent results of benchmarking against electromagnetic codes, as well as the limitations to the model.
Keywords :
electron emission; electron guns; electron sources; electrostatics; finite element analysis; free electron lasers; time-domain analysis; 3D finite-element analysis; BWR; ESTD simulation; FEL injector; JTO; MICHELLE code; ONR; RF density-modulated electron emission source; SAIC; electromagnetic cavity field; electromagnetic code; electrostatic time-domain PIC simulation; free-electron laser injector; high-energy laser community; high-power UHF IOT cavity; high-power UHF inductive output tube cavity; particle-in-cell simulation; photoemission RF electron gun; three dimensional finite-element analysis; Cathodes; Electrostatics; Laser beams; Photoelectricity; Radio frequency; Solid modeling; Surface emitting lasers; IOT; MICHELLE; MICHELLE Code; Photoinjector; RF gun; density modulated sources; electrostatic time-domain particle-in-cell; gated emitter; inductive output tube; photoemission; photoemitter;
Conference_Titel :
Vacuum Electronics Conference (IVEC), 2012 IEEE Thirteenth International
Conference_Location :
Monterey, CA
Print_ISBN :
978-1-4673-0188-6
Electronic_ISBN :
978-1-4673-0187-9
DOI :
10.1109/IVEC.2012.6262188
