金属中的正离子形成的电场是均匀的，价电子不被原子所束缚，可以在整个金属中自由地运动。
在高效率和低电流小信号范围内，理论地分析了用反向渐变波导提高远红外波导自由电子激光器(FIR - FEL)效率的机理。
In the high efficiency and small signal region, we investigate theoretically the efficiency enhancement mechanism of far infrared free electron laser (FIR-FEL) with a reverse tapering waveguide.
用单粒子理论分析了未被有质动力势阱捕获的电子对电磁波泵自由电子激光边带不稳定性的影响。
Influence of untrapped electrons on the sideband instability of electromagnetic Wig-gler free electron laser(EM-FEL)is analyzed in detail with single-particle theory.
我们对喇曼自由电子激光器输出的辐射信号进行了系统的测试，获得的数据曲线与理论计算结果完全符合。
Systematic measurements of a go out radiation signal from our Raman free-electron laser indicated a good agreement between experimental data and theoretical calculations.
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