Attosecond Coherence Time Characterization in Hard X-Ray Free-Electron Laser

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

doi:10.1038/s41598-020-60328-4

Title: Attosecond Coherence Time Characterization in Hard X-Ray Free-Electron Laser

Journal Article · 06 April 2020 · Scientific Reports

DOI: https://doi.org/10.1038/s41598-020-60328-4 · OSTI ID:1619824

Zhou, Guanqun ^[1]; Decker, Franz-Josef ^[2]; Ding, Yuantao ^[2]; Jiao, Yi ^[3];

^[2];

^[2]; Wang, Jiuqing ^[4]; Holman, Aaron J. ^[5]; Tsai, Cheng-Ying ^[6]; Wu, Jerome Y. ^[7]; Wu, Weiwei ^[8]; Yang, Chuan ^[9]; Yoon, Moohyun ^[10];

^[2]

Chinese Academy of Sciences (CAS), Beijing (China); SLAC National Accelerator Lab., Menlo Park, CA (United States); Univ. of Chinese Academy of Sciences, Beijing (China)
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Chinese Academy of Sciences (CAS), Beijing (China)
Chinese Academy of Sciences (CAS), Beijing (China); Univ. of Chinese Academy of Sciences, Beijing (China)
Univ. of Chicago, IL (United States)
SLAC National Accelerator Lab., Menlo Park, CA (United States); Huazhong Univ. of Science and Technology, Wuhan (China)
Jane Lathrop Stanford Middle School, Palo Alto, CA (United States)
Serra Catholic High School, San Juan Capistrano, CA (United States)
SLAC National Accelerator Lab., Menlo Park, CA (United States); Univ. of Science and Technology of China, Hefei (China)
Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of)

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.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-76SF00515; FWP-2013-SLAC-100164

OSTI ID:: 1619824

Alternate ID(s):: OSTI ID: 1623285

Journal Information:: Scientific Reports, Vol. 10, Issue 1; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Single-shot spectro-temporal characterization of XUV pulses from a seeded free-electron laser De Ninno, Giovanni; Gauthier, David; Mahieu, Benoît Nature Communications, Vol. 6, Issue 1 https://doi.org/10.1038/ncomms9075	journal	August 2015
Interferometry for full temporal reconstruction of laser-plasma accelerator-based seeded free electron lasers Labat, M.; Bielawski, S.; Loulergue, A. New Journal of Physics, Vol. 22, Issue 1 https://doi.org/10.1088/1367-2630/ab6878	journal	January 2020
Spectrotemporal Shaping of Seeded Free-Electron Laser Pulses Gauthier, David; Ribič, Primož Rebernik; De Ninno, Giovanni Physical Review Letters, Vol. 115, Issue 11 https://doi.org/10.1103/PhysRevLett.115.114801	journal	September 2015