Status of Infrared Free Electron Laser at Nihon University
Status of Infrared Free Electron Laser at Nihon University
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日本大学红外自由电子激光器的现状
DOI：
10.7567/jjaps.41s1.34
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发表时间：
2002
影响因子：
1.5
通讯作者：
K. Sato
中科院分区：
文献类型：
--
作者：
T. Tanaka;I. Sato;K. Hayakawa;Y. Hayakawa;K. Sato
日本大学电子束研究与应用实验室（LEBRA）为材料、生命、资源科学等实验开发了自由电子激光（FEL）系统。1998年，125MeV电子直线加速器的束流首次被引入自由电子激光系统。我们遇到了一些困难，特别是在电子束稳定性的长脉冲运行的直线加速器，这是一个相对较短的波长自由电子激光系统所要求的。2001年，利用为近红外自由电子激光设计的波荡器，在86MeV电子能量下实现了1.5μm自由电子激光的首次激光输出。通过提高速调管输出射频相位的稳定性，可以有效地抑制束流的波动，并在激光器中获得成功。为了使LEBRA自由电子激光器能够应用于各种研究，提高自由电子激光器的激光稳定性是当前的重要课题。
A free electron laser (FEL) system has been developed for the experiments of material, life, resource sciences and others at the Laboratory for Electron Beam Research and Application (LEBRA) in Nihon University. The beam from a 125MeV electron linac was first introduced to the FEL system in 1998. We had encountered several difficulties especially in the electron beam stability for the long pulse operation of the linac which was required for a relatively short wavelength FEL system. In 2001 the first lasing of 1.5µm FEL was achieved at the electron energy of 86MeV using an undulator designed for the near infrared FEL. We could suppress the beam current fluctuations quite effectively by improving the stability of the phase of the klystron output RF and have succeeded in lasing. The current important subject is to improve the stability of the FEL lasing for the applications of the LEBRA FEL to various studies.