弱自由电子激光脉动驱动下原子共振的频率响应
Frequency response of an atomic resonance driven by weak free-electron-laser fluctuating pulses
摘要：
最近的实验有关的弱SASE-FEL脉冲与原子和分子的相互作用的动机，我们调查的条件下，这种相互作用可以描述在一个简单的相位扩散模型的框架与去相关的原子场动力学。波动的性质，不可避免地存在于SASE-FEL脉冲中的去相关的成功发挥了关键作用。我们的分析是在软X射线制度与特定的最近的实验结果从FLASH。
英文摘要：
Motivated by recent experiments pertaining to the interaction of weak SASE-FEL pulses with atoms and molecules, we investigate the conditions under which such interactions can be described in the framework of a simple phase-diffusion model with decorrelated atom-field dynamics. The nature of the fluctuations that are inevitably present in SASE-FEL pulses is shown to play a pivotal role in the success of the decorrelation. Our analysis is performed in connection with specific recent experimental results from FLASH in the soft X-ray regime.
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