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利用自洽非线性理论研究了8 mm 3次回旋谐波开槽潘尼管注波互作用。首先,明确地揭示了在高次回旋谐波开槽潘尼管中,电子回旋谐波次数,高频场分布,决定了不同初始相位电子的电子能量分布以及引导中心漂移规律,指出当回旋半径减小,引导中心偏移达到一定程度时,谐振条件被破坏限制了高次谐波潘尼管效率的提高,并提出了通过优化磁场分布提高效率。最后,进一步研究了电子纵向速度离散、偏心和电流大小等因素对互作用效率的影响,表明在实验可达到的电子注质量下,研制实用的高效高次谐波潘尼管是可行的。
The principle of self - consistent nonlinearity is used to study the wave interaction of grooving PANI tube with 8 mm 3 times harmonic wave. First of all, it clearly reveals that the electron cyclotron frequency and the high-frequency field distribution in the high-order cyclotron wave-cut Penny tube determine the electron energy distribution and the guide center drift law of different initial phase electrons. It is pointed out that when the gyration radius When the deflection of the guide center is reduced to a certain degree, the resonance condition is damaged and the efficiency of the high-order harmonic Pennon tube is limited. The optimization of the magnetic field distribution is proposed to improve the efficiency. Finally, the influence of the factors such as longitudinal velocity dispersion, eccentricity and current on the interaction efficiency is further studied. It is shown that it is feasible to develop a practical high efficiency harmonic subnanometer with the experimentally achievable electron mass.