• V. Kumar, K.-J. Kim
  ANL, Argonne, Illinois

Funding: Work supported by U.S. Department of Energy, Office of Basic Energy Sciences, under contract No. W-31-109-ENG-38

We present a one-dimensional time-dependent analysis and simulation of Smith-Purcell (SP) free-electron lasers (FELs). The coupled Maxwell-Lorentz equations for SP-FELs are set up, and the details of numerical simulation are presented. For an SP-FEL based on low energy (~35 keV) DC (~1 mA) electron beam from a scanning electron microscope, we show that around 100 mW of power can be generated at THz. frequency in the form of a surface electromagnetic wave due to FEL interaction. We propose a two-grating configuration where the electron beam gets bunched in the first grating and radiates copiously in the second grating due to coherent spontaneous emission, if the parameters of the second grating are optimized suitably.