Author: Leemans, W.
Paper Title Page
TUP053
 Short-period Undulators based on Laser-driven Wakefields in Plasma Channels  
 
  • C.B. Schroeder, E. Esarey, C.G.R. Geddes, W. Leemans, S.G. Rykovanov
    LBNL, Berkeley, California, USA
  
  Funding: Work supported by the U.S. DOE under Contract No.DE-AC02-05CH11231.
We pre­sent a novel type of short-pe­riod un­du­la­tor based on con­trol­ling the fo­cus­ing forces on a beam in a plasma wave ex­cited by an in­tense laser pulse un­der­go­ing cen­troid os­cil­la­tions in a plasma chan­nel. The pe­riod of such a plasma un­du­la­tor is pro­por­tional to the Rayleigh length of the laser pulse and can be sub-mm with an ef­fec­tive un­du­la­tor strength pa­ra­me­ter of order unity. The un­du­la­tor pe­riod can fur­ther be con­trolled and re­duced by beat­ing laser modes, or using mul­ti­ple col­ors, in the plasma chan­nel. We pre­sent an­a­lytic ex­pres­sions for the elec­tron tra­jec­to­ries in the plasma un­du­la­tor. An­a­lytic work is com­pared to nu­mer­i­cal mod­el­ing. Ex­am­ples are pre­sented of short-pe­riod laser-dri­ven plasma un­du­la­tors based on avail­able laser and plasma chan­nel pa­ra­me­ters.