Measurement of <20 fs bunch length using coherent transition radiation
Measurement of <20 fs bunch length using coherent transition radiation
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使用相干跃迁辐射测量 <20 fs 束长度
DOI：
10.1103/physrevstab.17.072803
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
and Y. Yoshida
中科院分区：
文献类型：
--
作者：
I. Nozawa;K. Kan;J. Yang;A. Ogata;T. Kondoh;M. Gohdo;K. Norizawa;H. Kobayashi;H. Shibata;S. Gonda;and Y. Yoshida
通过用迈克尔逊干涉仪监测相干跃迁辐射(CTR)，研究了束团长度测量。利用基于光阴极的直线加速器(直线加速器)和磁束压缩器产生了小于20飞秒的电子束。用迈克尔逊干涉仪测量了2.1兆pC和32兆电子伏飞秒电子束的CTR，该干涉仪有两个不同光谱范围的探测器，扩大了CTR的探测光谱范围(范围从3到50太赫兹)，使我们能够确定电子束的束长。提出了一种基于干涉仪频率灵敏度的干涉仪模型，并将其引入到干涉仪的干涉图分析中。利用该模型对测量的干涉图和频谱进行了解释。
By monitoring coherent transition radiation (CTR) with a Michelson interferometer, bunch length measurement was investigated. Less-than-20-fs electron bunches were generated by a photocathode-based linear accelerator (linac) and a magnetic bunch compressor. From the femtosecond electron bunch of 2.1 pC and 32 MeV, CTR was measured using a Michelson interferometer that had two detectors with different spectral ranges, which enhanced the detection spectral range of CTR (ranging from 3 to 50 THz) and enabled us to determine the bunch length of the electron bunch. A model based on the interferometer’s frequency sensitivity was proposed and introduced to analyze the measured interferograms. The measured interferograms and the frequency spectra were explained using the model.