Optical wakefield from a photonic bandgap fiber accelerator

Chris M.S. Sears, Eric R. Colby, Ben Cowan, Rasmus Ischebeck, Chris M. McGuinness, Robert Noble, Robert H. Siemann, James E. Spencer, Dieter Walz, Robert L. Byer, Tomas Plettner
2007 2007 IEEE Particle Accelerator Conference (PAC)  
Photonic Bandgap (PBG) structures have recently been proposed as optical accelerators for their high coupling impedance and high damage threshold. As a first step in preparing a PBG accelerator, we propose to observe the optical wakefield induced by an electron beam traversing the structure in the absence of a coupled laser pulse. The electrons are focused into the fiber via a permanent magnet quadrupole triplet. The electrons excite fiber modes with speed-of-light (SOL) phase velocities. By
more » ... erving the wakefield using a spectrometer, the SOL mode frequencies are determined.
doi:10.1109/pac.2007.4440683 fatcat:udvz6x5jdzhv5md226iitv4m7m