远红外射频自由电子激光的振荡器起振与腔长失谐
A STUDY OF START UP AND DETUNING IN THE CAVITY LENGTH FOR THE FAR INFRAREDRF-FEL OSCILLATOR
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摘要: 用数值计算方法研究了电子束脉冲宽度与滑移长度相差不多时远红外RFFEL(射频型自由电子激光)振荡器的起振问题。结果表明,在适当的失谐长度下能够抑制激光呆滞效应的发生,振荡器可以起振。采用不同腔长失谐方式,可以进一步提高功率和抽取效率。Abstract: A numerical study has been made of the start up for the far infrared RF-FEL oscillator in which the electron pulse length is comparable to the slippage between the electrons and the light occurring inside the Wiggler in this paper. We show that the laser lethargy can be overcome and the oscillator can start up if there is a adequate detuning in the optical cavity length. The laser power and efficiency can grow more if we use the optimum methode to detune the optical resonator.
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Key words:
- pulse length /
- slippage length /
- laser lethargy /
- detuning length /
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