Record high extraction efficiency of free electron laser oscillator
Record high extraction efficiency of free electron laser oscillator
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自由电子激光振荡器创下高提取效率纪录
DOI：
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发表时间：
2020
影响因子：
2.3
通讯作者：
R. Hajima
中科院分区：
文献类型：
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作者：
H. Zen;H. Ohgaki;R. Hajima
在京都大学中红外自由电子激光（FEL）装置上，实现了自由电子激光振荡器的最高提取效率（9.4%）。由于电子束与自由电子激光电磁场的相互作用，电子能量最大降低了16%。测量的能量下降与测量的自由电子激光光谱是一致的。在11 μm波长下，获得了能量为100 μJ，脉宽为几个周期的FEL微脉冲。这一结果是高提取效率自由电子激光振荡器的一个重要里程碑，将对原子和分子的强场物理做出贡献。
The highest extraction efficiency (9.4%) of a free electron laser (FEL) oscillator has been achieved at the midinfrared FEL facility of Kyoto University. Because of the interaction between the electron beam and FEL electromagnetic field, a maximum electron energy decrease of 16% was observed. The measured energy decrease was consistent with the measured FEL spectrum. An FEL micropulse energy of ∼100 μJ with the expected few-cycle pulse duration at a wavelength of 11 μm was observed. This result is an important milestone for the high-extraction-efficiency FEL oscillator and will contribute to the strong-field physics of atoms and molecules.