Attosecond Coherence Time Characterization in Hard X-Ray Free-Electron Laser
Abstract
One of the key challenges in scientific researches based on free-electron lasers (FELs) is the characterization of the coherence time of the ultra-fast hard x-ray pulse, which fundamentally influences the interaction process between x-rays and materials. Conventional optical methods, based on autocorrelation, are very difficult to realize due to the lack of mirrors. Here, we experimentally demonstrate a novel method which yields a coherence time of 174.7 attoseconds for the 6.92 keV FEL pulses at the Linac Coherent Light Source. In our experiment, a phase shifter is adopted to control the cross-correlation between x-ray and microbunched electrons. This approach provides critical diagnostics for the temporal coherence of x-ray FELs and is universal for general machine parameters; applicable for wide range of photon energy, radiation brightness, repetition rate and FEL pulse duration.
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1619824
- Alternate Identifier(s):
- OSTI ID: 1623285
- Grant/Contract Number:
- AC02-76SF00515; FWP-2013-SLAC-100164
- Resource Type:
- Published Article
- Journal Name:
- Scientific Reports
- Additional Journal Information:
- Journal Name: Scientific Reports Journal Volume: 10 Journal Issue: 1; Journal ID: ISSN 2045-2322
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United Kingdom
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Citation Formats
Zhou, Guanqun, Decker, Franz-Josef, Ding, Yuantao, Jiao, Yi, Lutman, Alberto A., Maxwell, Timothy J., Raubenheimer, Tor O., Wang, Jiuqing, Holman, Aaron J., Tsai, Cheng-Ying, Wu, Jerome Y., Wu, Weiwei, Yang, Chuan, Yoon, Moohyun, and Wu, Juhao. Attosecond Coherence Time Characterization in Hard X-Ray Free-Electron Laser. United Kingdom: N. p., 2020.
Web. doi:10.1038/s41598-020-60328-4.
Zhou, Guanqun, Decker, Franz-Josef, Ding, Yuantao, Jiao, Yi, Lutman, Alberto A., Maxwell, Timothy J., Raubenheimer, Tor O., Wang, Jiuqing, Holman, Aaron J., Tsai, Cheng-Ying, Wu, Jerome Y., Wu, Weiwei, Yang, Chuan, Yoon, Moohyun, & Wu, Juhao. Attosecond Coherence Time Characterization in Hard X-Ray Free-Electron Laser. United Kingdom. https://doi.org/10.1038/s41598-020-60328-4
Zhou, Guanqun, Decker, Franz-Josef, Ding, Yuantao, Jiao, Yi, Lutman, Alberto A., Maxwell, Timothy J., Raubenheimer, Tor O., Wang, Jiuqing, Holman, Aaron J., Tsai, Cheng-Ying, Wu, Jerome Y., Wu, Weiwei, Yang, Chuan, Yoon, Moohyun, and Wu, Juhao. Mon .
"Attosecond Coherence Time Characterization in Hard X-Ray Free-Electron Laser". United Kingdom. https://doi.org/10.1038/s41598-020-60328-4.
@article{osti_1619824,
title = {Attosecond Coherence Time Characterization in Hard X-Ray Free-Electron Laser},
author = {Zhou, Guanqun and Decker, Franz-Josef and Ding, Yuantao and Jiao, Yi and Lutman, Alberto A. and Maxwell, Timothy J. and Raubenheimer, Tor O. and Wang, Jiuqing and Holman, Aaron J. and Tsai, Cheng-Ying and Wu, Jerome Y. and Wu, Weiwei and Yang, Chuan and Yoon, Moohyun and Wu, Juhao},
abstractNote = {One of the key challenges in scientific researches based on free-electron lasers (FELs) is the characterization of the coherence time of the ultra-fast hard x-ray pulse, which fundamentally influences the interaction process between x-rays and materials. Conventional optical methods, based on autocorrelation, are very difficult to realize due to the lack of mirrors. Here, we experimentally demonstrate a novel method which yields a coherence time of 174.7 attoseconds for the 6.92 keV FEL pulses at the Linac Coherent Light Source. In our experiment, a phase shifter is adopted to control the cross-correlation between x-ray and microbunched electrons. This approach provides critical diagnostics for the temporal coherence of x-ray FELs and is universal for general machine parameters; applicable for wide range of photon energy, radiation brightness, repetition rate and FEL pulse duration.},
doi = {10.1038/s41598-020-60328-4},
journal = {Scientific Reports},
number = 1,
volume = 10,
place = {United Kingdom},
year = {Mon Apr 06 00:00:00 EDT 2020},
month = {Mon Apr 06 00:00:00 EDT 2020}
}
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https://doi.org/10.1038/s41598-020-60328-4
https://doi.org/10.1038/s41598-020-60328-4
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Figure 1: Schematic description of hard x-ray SASE FEL coherence time measurement based on crosscorrelation between microbunched electrons and x-ray pulse. Hard x-ray SASE FEL is generated in the beforedelay undulators, then a phase shifter is employed to generate a relative delay between the electrons and the x-ray and themore »
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Figures / Tables found in this record:
Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.