Author: Balal, N.
Paper Title Page
TUP015 Radiation and Interaction of Layers in Quasi-plane Electron Bunches Moving in Undulators 388
 
  • N. Balal
    Ariel University, Ariel, Israel
  • V.L. Bratman
    IAP/RAS, Nizhny Novgorod, Russia
  
  The model of ra­di­at­ing planes (1D ra­di­at­ing gas) con­sist­ing of elec­trons that os­cil­late and travel with a rel­a­tivis­tic trans­la­tional ve­loc­ity al­lows one to de­velop a sim­ple gen­eral the­ory de­scrib­ing a num­ber of im­por­tant ef­fects of ra­di­a­tion in a un­du­la­tor for dense elec­tron bunches formed in pho­toin­jec­tor ac­cel­er­a­tors. Hav­ing based on this method and tak­ing into ac­count both Coulomb and ra­di­a­tion in­ter­ac­tions of the planes with an ar­bi­trary den­sity, par­ti­cle ve­loc­ity dis­tri­b­u­tion and en­ergy chirp we have found an­a­lyt­i­cally and nu­mer­i­cally ef­fi­ciency and fre­quency spec­trum for co­her­ent spon­ta­neous ra­di­a­tion, in­clud­ing con­di­tions for gen­er­a­tion of min­i­mum nar­row and very broad­band spec­tra. The de­vel­oped the­ory has been ap­plied for es­ti­ma­tion of a pow­er­ful ter­a­hertz ra­di­a­tion source with a mod­er­ate en­ergy of elec­trons.  
 
TUP081 Configuration and Status of the Israeli THz Free Electron Laser 553
 
  • A. Friedman, N. Balal, V.L. Bratman, E. Dyunin, Yu. Lurie, E. Magori
    Ariel University, Ariel, Israel
  • A. Gover
    University of Tel-Aviv, Faculty of Engineering, Tel-Aviv, Israel
  
  Funding: This project is funded in part by Israel Ministry of Defense.
A THz FEL is being built in Ariel Uni­ver­sity. This pro­ject is a col­lab­o­ra­tion be­tween Ariel Uni­ver­sity, and Tel Aviv Uni­ver­sity. Upon com­ple­tion it is in­tended to be­come a user fa­cil­ity. The FEL is based on a com­pact photo cath­ode gun (60 cm) that will gen­er­ate an elec­tron beam at en­er­gies of 4.5 - 6.5 MeV. The pulses are planned to be of 300 pico Coulomb for a sin­gle pulse, and of up to 1.5 nano Coulomb for a train of pulses. The FEL is de­signed to emit ra­di­a­tion be­tween 1 and 5 THz. It is planned to op­er­ate in the super ra­di­ance regime. The con­fig­u­ra­tion of the en­tire sys­tem will be pre­sented, as well as the­o­ret­i­cal and nu­mer­i­cal re­sults for the an­tic­i­pated out­put of the FEL, which is in ex­cess of 150 KW in­stan­ta­neous power. The bunch­ing of the elec­tron bean will be achieved by mix­ing two laser beams on the photo-cath­ode. The com­pres­sion of the beam will be achieved be in­tro­duc­ing an en­ergy chierp to the beam and pass­ing it through a he­li­cal chi­cane. We plan on com­press­ing the sin­gle pulse to less than 150 femto sec­onds. The sta­tus of the pro­ject at the time of the con­fer­ence will be pre­sented. 		 
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