• X.L. Xu, C.-X. Tang, Q.Z. Xing
  TUB, Beijing

Tsinghua University Thomson X-ray source ( TTX ) has been proposed at Tsinghua University. With the nominal electron beam parameters ( beam energy of 50MeV, slice energy spread of 5keV, peak current of 600A, rms normalized emittance of 2 mm mrad ) of the TTX linac , the design of Free Electron Laser ( FEL ) by the Echo-Enabled Harmonic Generation ( EEHG ) scheme is presented in this paper. High harmonics of the seeding laser is generated by the EEHG scheme. Parameters of the undulators and seeding lasers are optimized. Simulation results using the GENESIS code are also presented in this paper.