Working condition of reconstructed optical klystron of CHG-SRFEL
The symmetry optical klystron (OK) of NSRL for coherent harmonic generation storagering freeelectron laser (CHGSRFEL) has been reconstructed to asymmetry structure in order to increase the resonant energy of electron beam and generate more powerful coherent harmonic radiation. Each period of the independently adjusted modulator has been extended from 72mm to 92mm, and the number of the periods has changed from 12 to 10. This paper analyzes the relations of the parameters of reconstructed optical klystron, including the resonant energy of electron beam versus the gap of modulator, special parameter of dispersive section versus the gap of dispersive section, and the gap of radiator versus the gap of modulator. It also discusses the factors that influence coherent harmonic radiation and provides the parameters of two working models in the end.