High-efficiency extraction of microwave radiation from a tapered-wiggler free-electron laser.
High-efficiency extraction of microwave radiation from a tapered-wiggler free-electron laser.
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DOI：
10.1103/physrevlett.57.2172
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发表时间：
1986-10
影响因子：
8.6
通讯作者：
T. Orzechowski;B. R. Anderson;J. C. Clark;W. Fawley;A. Paul;D. Prosnitz;E. Scharlemann;S. Yarema;D. Hopkins;A. Sessler;J. Wurtele
中科院分区：
文献类型：
--
作者：
T. Orzechowski;B. R. Anderson;J. C. Clark;W. Fawley;A. Paul;D. Prosnitz;E. Scharlemann;S. Yarema;D. Hopkins;A. Sessler;J. Wurtele
我们已经大大提高了输出功率和提取效率的自由电子激光器工作在34.6 GHz的锥形摇摆器磁场。在指数增益状态下，激光器表现出34 dB/m的测量增益。当输入信号为50 kW时，放大器在1.3 m处饱和，输出信号为180 MW。通过使用锥形，使摇摆器末端的磁场下降到其初始（峰值）值的45%，我们将输出信号增加到1.0 GW。这相当于34%的提取效率。
We have substantially increased the output power and extraction efficiency of a free-electron laser operating at 34.6 GHz by tapering the wiggler magnetic field. In the exponential-gain regime, the laser exhibited a measured gain of 34 dB/m. With a 50-kW input signal, the amplifier saturated in 1.3 m with a 180-MW output signal. By using a taper that brought the magnetic field at the end of the wiggler down to 45% of its initial (peak) value, we increased the output signal to 1.0 GW. This corresponds to an extraction efficiency of 34%.