It is proposed that the energy of electrons can be enhanced using a sharply chirped intense laser pulse in vacuum laser acceleration instead of using a linear frequency chirp as proposed in previous studies. There exists an optimum value of frequency chirp parameter, which changes with laser intensity, laser spot size, pulse duration and duration of interaction. These parameters have an important effect on the energy gained by electrons which can then be accelerated to MeV/GeV energies for suitable parameters.

中文翻译：

---

在真空中使用尖锐轮廓的激光脉冲增强加速电子的能量

提出可以在真空激光加速中使用尖锐的intense强烈激光脉冲来增强电子能量，而不是使用先前研究中提出的线性频率chi来增强电子能量。存在一个频率线性调频参数的最佳值，该值随激光强度，激光光斑大小，脉冲持续时间和相互作用持续时间而变化。这些参数对电子获得的能量有重要影响，然后可以将电子加速为适合参数的MeV / GeV能量。