First lasing of LEBRA FEL at Nihon University at a wavelength of 1.5 μm
First lasing of LEBRA FEL at Nihon University at a wavelength of 1.5 μm
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DOI：
10.1016/s0168-9002(02)00281-4
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发表时间：
2002-05-01
影响因子：
1.4
通讯作者：
Kato, M
中科院分区：
文献类型：
--
作者：
Hayakawa, Y;Sato, I;Kato, M
日本大学电子束研究与应用实验室（LEBRA）研制了波长范围从800 nm到5 pm的自由电子激光系统。该系统由125 MeV S波段直线加速器和50周期交变场平面波荡器组成，利用介质镜实现了1.5 μ m波长的首次激光输出。虽然还没有观察到FEL功率的饱和，但是通过使用InSb检测器的测量，已经获得了约10（8）倍的自发辐射功率的放大。绝对功率估计为几毫焦耳/宏脉冲，并经常观察到强可见光，这取决于基频自由电子激光的强度。测量的时间结构的现象表明，这是与电子束中的微聚束的形成有关的辐射。(C)2002 Elsevier Science B. V.保留所有权利。
The FEL system covering wavelengths from 800 nm to 5 pm has been developed at Laboratory for Electron Beam Research and Application (LEBRA) in Nihon University. The system consists of a conventional 125 MeV S-band linac and a planar undulator with the alternative field of 50 periods.The first lasing of the system was achieved at the wavelength of 1.5 mum using dielectric mirrors. Although the saturation of the FEL power has not been observed yet, amplification of the spontaneous radiation power by about 10(8) times has been obtained with the measurement using the InSb detector. The absolute power has been estimated to be a few mJ/macropulse.An intense visible light has been observed frequently depending on the intensity of the fundamental FEL. The measured time structure of the phenomenon suggests that this is the radiation related with the formation of the microbunches in the electron beam. (C) 2002 Elsevier Science B.V. All rights reserved.