Cascaded hard X-ray self-seeded free-electron laser at megahertz repetition rate

被引：21

作者：

Liu, Shan ^{[1
]}

Grech, Christian ^{[1
]}

Guetg, Marc ^{[1
]}

Karabekyan, Suren ^{[2
]}

Kocharyan, Vitali ^{[1
]}

Kujala, Naresh ^{[2
]}

Lechner, Christoph ^{[2
]}

Long, Tianyun ^{[1
,3
]}

Mirian, Najmeh ^{[1
]}

Qin, Weilun ^{[1
]}

Serkez, Svitozar ^{[2
]}

Tomin, Sergey ^{[1
]}

Yan, Jiawei ^{[2
]}

Abeghyan, Suren ^{[2
]}

Anton, Jayson ^{[4
]}

Blank, Vladimir ^{[5
]}

Boesenberg, Ulrike ^{[2
]}

Brinker, Frank ^{[1
]}

Chen, Ye ^{[1
]}

Decking, Winfried ^{[1
]}

Dong, Xiaohao ^{[2
,6
]}

Kearney, Steve ^{[4
]}

La Civita, Daniele ^{[2
]}

Madsen, Anders ^{[2
]}

Maltezopoulos, Theophilos ^{[2
]}

Rodriguez-Fernandez, Angel ^{[2
]}

Saldin, Evgeni ^{[1
]}

Samoylova, Liubov ^{[2
]}

Scholz, Matthias ^{[1
]}

Sinn, Harald ^{[2
]}

Sleziona, Vivien ^{[2
,7
]}

Shu, Deming ^{[4
]}

Tanikawa, Takanori ^{[2
,8
]}

Terentiev, Sergey ^{[5
]}

Trebushinin, Andrei ^{[2
]}

Tschentscher, Thomas ^{[2
]}

Vannoni, Maurizio ^{[2
]}

Wohlenberg, Torsten ^{[1
]}

Yakopov, Mikhail ^{[2
]}

Geloni, Gianluca ^{[2
]}

机构：

[1] Deutsch Elektronen Synchrotron DESY, Hamburg, Germany

[2] European XFEL, Schenefeld, Germany

[3] Peking Univ, Beijing, Peoples R China

[4] Argonne Natl Lab, Argonne, IL USA

[5] Technol Inst Superhard & Novel Carbon Mat, Troitsk, Russia

[6] Shanghai Synchrotron Radiat Facil, Shanghai, Peoples R China

[7] Fritz Haber Inst, Max Planck Soc, Berlin, Germany

[8] High Energy Accelerator Res Org KEK, Tsukuba, Japan

来源：

NATURE PHOTONICS | 2023年 / 17卷 / 11期

关键词：

GENERATION; SCATTERING; RADIATION; BEAM;

D O I：

10.1038/s41566-023-01305-x

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

High-resolution X-ray spectroscopy in the sub-nanosecond to femtosecond time range requires ultrashort X-ray pulses and a spectral X-ray flux considerably larger than that presently available. X-ray free-electron laser (XFEL) radiation from hard X-ray self-seeding (HXRSS) setups has been demonstrated in the past and offers the necessary peak flux properties. So far, these systems could not provide high repetition rates enabling a high average flux. We report the results for a cascaded HXRSS system installed at the European XFEL, currently the only operating high-repetition-rate hard X-ray XFEL facility worldwide. A high repetition rate, combined with HXRSS, allows the generation of millijoule-level pulses in the photon energy range of 6-14 keV with a bandwidth of around 1 eV (corresponding to about 1 mJ eV-1 peak spectral density) at the rate of ten trains per second, each train including hundreds of pulses arriving at a megahertz repetition rate. At 2.25 MHz repetition rate and photon energies in the 6-7 keV range, we observed and characterized the heat-load effects on the HXRSS crystals, substantially altering the spectra of subsequent X-ray pulses. We demonstrated that our cascaded self-seeding scheme reduces this detrimental effect to below the detection level. This opens up exciting new possibilities in a wide range of scientific fields employing ultrafast X-ray spectroscopy, scattering and imaging techniques. A cascaded hard X-ray self-seeding system is demonstrated at the European X-ray free-electron laser. The setup enables millijoule-level pulses in the photon energy range of 6-14 keV at the rate of ten trains per second, with each train including hundreds of pulses arriving at a megahertz repetition rate.

引用

页码：984 / +

页数：9

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