paper

Frequency response of an atomic resonance driven by weak free-electron-laser fluctuating pulses

arXiv:1401.4963 · doi:10.1088/0953-4075/46/16/164010

Abstract

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.

arXiv admin note: substantial text overlap with arXiv:1209.2231

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