Observation of coherent effect in undulator radiation.
Observation of coherent effect in undulator radiation.
复制标题
波荡器辐射相干效应的观察。
DOI：
10.1103/physrevlett.68.1140
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发表时间：
1992
影响因子：
8.6
通讯作者：
Lee
中科院分区：
文献类型：
--
作者：
Jeong;Kawamura;Toyoda;Nam;Lee
在低能量、低增益、波导模式自由电子激光器中观察到自发发射的相干效应。辐射强度比非相干辐射强${10}^{3}$倍以上。这种增强是由于电子束发出的相干辐射，它被微脉冲随机调制，其典型脉冲宽度（35 ps）与辐射波长相当。所测功率与电子束电流呈二次依赖关系。
The coherent effect in spontaneous emission has been observed in a low-energy, low-gain, waveguide-mode free-electron laser. The intensity of the radiation was more than ${10}^{3}$ times stronger than that of the incoherent radiation. This enhancement is due to coherent radiation emitted by the electron beam, which is randomly modulated by micropulses whose typical pulse width (\ensuremath{\sim}35 ps) is comparable to the radiation wavelength. The measured power tends towards a quadratic dependence on the electron-beam current.