S. Gold, R. Jackson, R. Parker, V. Granatstein, H. Freund, P. Efthimion, M. Herndon, A. Kinkead
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引用次数: 0
摘要
建立了一个新的实验来研究毫米波波长的拉曼自由电子激光相互作用。在超辐射放大器配置中进行的初步测量表明，在大约3.5 mm (85 GHz)的波长下产生了数十兆瓦的功率，该波长与存在摆动场的慢空间电荷波与基本波导模式的耦合一致。辐射转换效率为几个百分点，比以前的实验提高了一个数量级。功率阈值和波长对泵浦和波导磁场的参数依赖性与单粒子轨迹的小信号增益分析相关。
A new experiment has been constructed to study the Raman free-electron laser interaction at millimeter wavelengths. Preliminary measurements, conducted in a superradiant amplifier configuration, indicate the production of tens of MW's of power at approximately 3.5 mm (85 GHz), a wavelength consistent with a coupling of the slow-space-charge wave with the fundamental waveguide mode in the presence of the wiggler field. The radiation conversion efficiency is several percent, an order of magnitude improvement over previous experiments. The parametric dependence of power thresholds and wavelength on pump and guide magnetic fields are found to correlate with a small signal gain analysis of single particle trajectories.
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