GIANT LASER-PULSES IN THE DUKE STORAGE-RING UV FEL

We have studied the dynamics of giant pulse generation in the Duke UV FEL with peak power of several gigawatts. The giant pulses will be provided by a FEL gain modulation technique developed for the OK-4 UV FEL at Novosibirsk, Russia. A new mechanism for ''super-pulse'' generation was discovered during these studies. It allows the generation of peak power up to 10 GW using the ''phase space'' refreshment of the electron beam caused by synchrotron motion [V. Litvinenko et al., to be published]. We have developed a new macro-particle code for giant pulse simulation including all known mechanisms of storage ring FEL interaction. Results of these giant pulse simulations are presented in the paper.