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电子束和种子激光一同通过光学速调管时 ,产生相干谐波辐射 ,这是获得短波长相干光的一种很有希望的途径。为产生相干辐射 ,光学速调管波荡器磁极间隙、种子激光波长和电子能量三者必须满足共振条件 ,电子束团和种子激光脉冲在时间上必须严格同步。为使某次相干谐波辐射达到极大值 ,光学速调管色散段磁极间隙必须调节。介绍了相干谐波辐射的测量、种子激光与电子束的同步和光学速调管磁极间隙调节系统。
When the electron beam and the seed laser pass through an optical klystron, they generate coherent harmonic radiation, which is a very promising way to obtain short-wavelength coherent light. In order to generate coherent radiation, the optical klystron pole gap, the seed laser wavelength and the electron energy must satisfy the resonance conditions, and the electron bunches and the seed laser pulse must be strictly synchronized in time. In order to achieve a maximum harmonic radiation, the kurtosis of the klystron must be adjusted. The measurement of coherent harmonic radiation, the synchronization of seed laser and electron beam, and the pole gap adjustment system of optical klystron are introduced.