Femtosecond Electron Beam Bunch Compression by Using an Alpha Magnet and a Chicane Magnet at the PAL Test Linac
Femtosecond Electron Beam Bunch Compression by Using an Alpha Magnet and a Chicane Magnet at the PAL Test Linac
复制标题
DOI：
--
复制
发表时间：
2004
影响因子：
0.6
通讯作者：
Heung-Sik Kang;Guinyun Kim
中科院分区：
文献类型：
--
作者：
Heung-Sik Kang;Guinyun Kim
浦项加速器实验室（PAL）试验直线加速器由半室电子枪、α磁体和两个S波段加速柱组成，可提供束流能量高达85 MeV、脉冲长度为3 μs、脉冲电流为100 mA、重复频率为10 Hz的聚束电子束。用条纹相机测量的聚束长度为4ps，这是通过优化沿着α磁体的聚束压缩而获得的。为了进一步将聚束压缩到几百飞秒，正在准备另一个使用回旋磁铁的磁聚束压缩系统。PARMELA码的模拟结果表明，聚束长度可以缩短到亚皮秒。对α磁体和减速磁体的束团压缩机理进行了描述，并给出了仿真结果。作为飞秒电子束的应用，简要介绍了飞秒参量X射线和飞秒远红外辐射。
The Pohang Accelerator Laboratory (PAL) Test Linac which consists of a half-cell thermionic RF-gun, an alpha magnet, and two S-band accelerating columns can provide a bunched electron beam with a beam energy of up to 85 MeV, a pulse length of 3 μs, a pulse current of 100 mA, and a repetition rate of 10 Hz. The bunch length measured with a streak camera is 4 ps, which was obtained by optimizing the bunch compression along the alpha magnet. For further bunch compression to a few hundred femtoseconds, another magnetic bunch compression system using a chicane magnet is being prepared. The PARMELA code simulation result shows that the bunch length can be shortened to sub-picoseconds. The mechanism of bunch compression for the alpha magnet and the chicane magnet is described and the simulation result is presented. As applications of a femtosecond electron beam, femtosecond parametric X-ray and far-infrared radiation are reviewed briefly.