Direct Observation of the Pulse Width of an Ultrashort Electron Beam
Direct Observation of the Pulse Width of an Ultrashort Electron Beam
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DOI：
10.7566/jpsj.84.074501
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发表时间：
2015-06
影响因子：
1.7
通讯作者：
H. Kotaki;K. Kawase;Y. Hayashi;M. Mori;M. Kando;J. Koga;Sergei V. Bulanovt
中科院分区：
文献类型：
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作者：
H. Kotaki;K. Kawase;Y. Hayashi;M. Mori;M. Kando;J. Koga;Sergei V. Bulanovt
激光韦克菲尔德加速可以产生飞秒量级或更短的超短脉冲电子束，超短脉冲的产生是探索物质在更短时间尺度上动力学行为的关键。我们发现电子束的轮廓是通过旋转激光偏振来操纵的。电子束处于激光场中，激光场使电子束振荡。根据电子能量分布图像中的电子振荡，电子束脉冲宽度估计为1.7 fs（rms）。峰值电流为10 kA。
Laser wakefield acceleration has the possibility to generate an ultrashort electron beam of the order of femtoseconds or less. Generation of ultrashort pulses is a key to exploring the dynamical behavior of matter on ever-shorter timescales. We found that the profile of the electron beam was manipulated by rotating the laser polarization. The electron beam is in the laser field, which oscillates the electron beam. From electron oscillations in the image of the electron energy distribution, the electron beam pulse width is estimated to be 1.7 fs (rms). The peak current is 10 kA.