反向导引场自由电子激光器的三维非线性模拟
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摘要: 对Conde–Bekefi反向导引场自由电子激光(FEL)放大器实验进行了三维非线性分析。当引入一类似于回旋自谐振脉塞收缩角(pinch angle)参数的电子束入射角参数后,其模拟计算结果与实验相符。这预示了反向导引场FEL中束波互作用的一种新机理。Abstract: In this paper the Conde –Bekefi experiment is analyzed by the three –dimensional nonlinear simulations. When a small injection angle of electron beam is introduced, which is similar to the pinch angle in a cyclotron autoresonance maser, the simulation results are in good agreement with the experiment values. This indicates a novel interaction mechanism of FEL with a reversed guide magnetic field.
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