Frequency-, Time-, and Wavevector-Resolved Ultrafast Incoherent Diffraction of Noisy X-ray Pulses
| Autor: | Shaul Mukamel, Daeheum Cho, Shahaf Asban |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Diffraction
Physics business.industry Stochastic resonance Phase (waves) 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Noise (electronics) Optics Temporal resolution 0103 physical sciences General Materials Science Physical and Theoretical Chemistry Spectral resolution 010306 general physics 0210 nano-technology business Ultrashort pulse Effective frequency |
| Zdroj: | The Journal of Physical Chemistry Letters. 10:5805-5814 |
| ISSN: | 1948-7185 |
| DOI: | 10.1021/acs.jpclett.9b00924 |
| Popis: | We study theoretically incoherent time-resolved X-ray diffraction of fluctuating sources such as free electron lasers, as well as coherent sources with controllably added randomness. We find that the temporal resolution is strongly eroded by the noise. By considering frequency resolution of the signal, we find that the statistical properties of the noise carry important information allowing us to restore the temporal resolution. We propose a multidimensional stochastic resonance treatment to shape the optical window and extract this information from signals. Using the frequency-dependent stochastic phase as a frequency marker allows to improve the spectral resolution as well via intensity correlations. Frequency-tuned field correlation functions are used to modify the effective frequency gating and extract specific charge density contributions to the diffraction pattern while maintaining temporal resolution. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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