BUNCH LENGTH MEASUREMENTS AT LEBRA
BUNCH LENGTH MEASUREMENTS AT LEBRA
复制标题
LeBra 的束长度测量
DOI：
--
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
K. NakaoB
中科院分区：
文献类型：
--
作者：
K. Yokoyama;I. Sato;K. Hayakawa;T. Tanaka;Y. Hayakawa;K. NakaoB
在LEBRA（电子束研究与应用实验室）观测到了近红外和SASE的高增益自由电子激光放大。消色差弯曲系统作为束团压缩系统，在最后加速段的加速阶段得到了很短的束团。根据光束扩展对加速相位的依赖关系推导出相位椭圆参数，并利用该参数估算出聚束长度。根据实验结果估算出半高宽的束团长度约为0.33 mm。此外，还利用自相关法测量了1.5 μ m波长附近自由电子激光的脉冲宽度。根据干涉波的数目，脉冲长度小于0.06mm。FEL光的脉冲长度对应于电子聚束长度的约20%。
The high-gain FEL amplification in near IR and SASE have been observed at LEBRA (Laboratory for Electron Beam Research and Application). A very short bunch of the electron beams have been achieved by the achromatic bending system, as the bunch compression system due to apt on the accelerating phase in the last accelerating section. The bunch length was estimated from the phase ellipse parameters which is deduced from the dependence of the beam spread on the accelerating phase. The bunch length of FWHM was estimated approximately 0.33 mm from the results of the experiments. Besides, the pulse length of the FEL lights around the wavelength of 1.5 micrometer was measured by means of the autocorrelation. The pulse length was less than 0.06 mm according to the number of interference waves. The pulse length of the FEL lights corresponds to around 20% of the electron bunch length.