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Prokop, C.R.

Paper Title Page
TUPD075 Start-to-end Simulation of a Compact THz Smith-Purcell FEL 2093
 
  • C.R. Prokop, P. Piot
    Northern Illinois University, DeKalb, Illinois
  • M.C. Lin, P. Stoltz
    Tech-X, Boulder, Colorado
  
 

Ter­a­hertz (THz) ra­di­a­tion has gen­er­at­ed much re­cent in­ter­est due to its abil­i­ty to pen­e­trate deep into many or­gan­ic ma­te­ri­als with­out the dam­age as­so­ci­at­ed with ion­iz­ing ra­di­a­tions. The gen­er­a­tion of co­pi­ous amounts of nar­row-band THz ra­di­a­tion using a Smith-Pur­cell FEL op­er­at­ing as a back­ward wave os­cil­la­tor is being pur­sued by sev­er­al groups. In this paper we pre­sent start-to-end sim­u­la­tions of a Smith-Pur­cell FEL op­er­at­ing in the su­per­ra­di­ant regime. Our con­cept in­cor­po­rates a dou­ble grat­ing con­fig­u­ra­tion to ef­fi­cient­ly bunch the elec­tron beam, fol­lowed by a sin­gle grat­ing to pro­duce Smith-Pur­cell ra­di­a­tion. We demon­strate the ca­pa­bil­i­ties and per­for­mances of the de­vice, in­clud­ing ini­tial beam prop­er­ties (emit­tance and en­er­gy spread), with the help of nu­mer­i­cal sim­u­la­tions using the con­for­mal fi­nite-dif­fer­ence time-do­main elec­tro­mag­net­ic solver VOR­PAL.