Single Shot Coherence Properties of the Free-Electron Laser SACLA in the Hard X-ray Regime

被引：58

作者：

Lehmkuehler, Felix ^{[1
,2
]}

Gutt, Christian ^{[1
,2
]}

Fischer, Birgit ^{[1
,2
]}

Schroer, Martin A. ^{[1
,2
]}

Sikorski, Marcin ^{[3
]}

Song, Sanghoon ^{[3
]}

Roseker, Wojciech ^{[1
]}

Glownia, James ^{[3
]}

Chollet, Mathieu ^{[3
]}

Nelson, Silke ^{[3
]}

Tono, Kensuke ^{[4
]}

Katayama, Tetsuo ^{[4
]}

Yabashi, Makina ^{[5
]}

Ishikawa, Tetsuya ^{[5
]}

Robert, Aymeric ^{[4
]}

Gruebel, Gerhard ^{[1
,2
]}

机构：

[1] Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany

[2] Hamburg Ctr Ultrafast Imaging, D-22761 Hamburg, Germany

[3] SLAC Natl Accelerator Lab, LCLS, Menlo Pk, CA 94025 USA

[4] Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795148, Japan

[5] RIKEN SPring 8 Ctr, Sayo, Hyogo 6795148, Japan

来源：

SCIENTIFIC REPORTS | 2014年 / 4卷

关键词：

RADIATION; SPECKLE;

D O I：

10.1038/srep05234

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We measured the coherence properties of the free-electron laser SACLA on a single shot basis at an X-ray energy of 8 keV. By analysing small-angle X-ray scattering speckle patterns from colloidal dispersions we found a degree of transverse coherence of beta(t) = 0.79 +/- 0.09. Taking detector properties into account, we developed a simulation model in oder to determine the degree of coherence from intensity histograms. Finally we calculated a coherence time of tau(c) = 0.1 fs and a pulse duration of 5.2 fs which corresponds with previous predictions.

引用

页数：5

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