晶体摆动场辐射的能量很高,是获得短波长激光的重要途径之一。关键问题是如何提高摆动场辐射强度,如何将摆动场辐射与沟道辐射分离,将摆动场辐射中的相干辐射与自发辐射分离。首先,在经典力学框架内和线性近似下,讨论了摆动场辐射的瞬时辐射强度和平均辐射强度;引入无量纲偏转角讨论了这两种辐射的强度比、频率比和相干性。结果表明,在无量纲偏转角大于大于1时,只需在束流方向上放置一个张角为Δθ≈γ-1的接受器就可以将相干的摆动场辐射成功收集,而这时两种辐射的频率比和强度比都很大。 Crystal swing field radiation energy is high, is one of the important ways to obtain short-wavelength laser. The key issue is how to improve the radiation intensity of the swing field, how to separate the swing field radiation from the channel radiation, and separate the coherent radiation and spontaneous radiation in the swing field radiation. Firstly, under the framework of classical mechanics and linear approximation, the instantaneous radiation intensity and average radiation intensity of the oscillating field radiation are discussed. The non-dimensional deflection angle is introduced to discuss the intensity ratio, frequency ratio and coherence of these two kinds of radiation. The results show that when the dimensionless deflection angle is greater than 1, the radiation of the coherent swing field can be successfully collected by simply placing a receiver with an aperture angle of Δθ≈γ-1 in the beam direction, The frequency ratio and intensity ratio are great.