Coherence Properties of Individual Femtosecond Pulses of an X-Ray Free-Electron Laser

被引：134

作者：

Vartanyants, I. A. ^{[1
,2
]}

Singer, A. ^{[1
]}

Mancuso, A. P. ^{[1
]}

Yefanov, O. M. ^{[1
]}

Sakdinawat, A. ^{[3
]}

Liu, Y. ^{[3
]}

Bang, E. ^{[3
]}

Williams, G. J. ^{[4
]}

Cadenazzi, G. ^{[5
]}

Abbey, B. ^{[5
]}

Sinn, H. ^{[6
]}

Attwood, D. ^{[3
]}

Nugent, K. A. ^{[5
]}

Weckert, E. ^{[1
]}

Wang, T. ^{[4
]}

Zhu, D. ^{[4
]}

Wu, B. ^{[4
]}

Graves, C. ^{[4
]}

Scherz, A. ^{[4
]}

Turner, J. J. ^{[4
]}

Schlotter, W. F. ^{[4
]}

Messerschmidt, M. ^{[4
]}

Luening, J. ^{[7
]}

Acremann, Y. ^{[8
]}

Heimann, P. ^{[9
]}

Mancini, D. C. ^{[10
]}

Joshi, V. ^{[10
]}

Krzywinski, J. ^{[4
]}

Soufli, R. ^{[11
]}

Fernandez-Perea, M. ^{[11
]}

Hau-Riege, S. ^{[11
]}

Peele, A. G. ^{[12
]}

Feng, Y.

Krupin, O. ^{[4
]}

Moeller, S. ^{[4
]}

Wurth, W. ^{[13
,14
]}

机构：

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

[2] Natl Res Nucl Univ MEPhI, Moscow 115409, Russia

[3] Univ Calif Berkeley, Berkeley, CA 94720 USA

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

[5] Univ Melbourne, ARC Ctr Excellence Coherent Xray Sci, Sch Phys, Melbourne, Vic 3010, Australia

[6] European XFEL GmbH, D-22761 Hamburg, Germany

[7] Univ Paris 06, Lab Chim Phys Mat & Rayonnement, UMR 7614, CNRS, Paris, France

[8] ETH, Festkorperphys Lab, CH-8093 Zurich, Switzerland

[9] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA

[10] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

[11] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[12] La Trobe Univ, ARC Ctr Excellence Coherent Xray Sci, Dept Phys, Bundoora, Vic 3086, Australia

[13] Univ Hamburg, Inst Expt Phys, D-22761 Hamburg, Germany

[14] Univ Hamburg, CFEL, D-22761 Hamburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 14期

关键词：

EXTREME-ULTRAVIOLET; LIGHT; INTERFERENCE; WAVELENGTH; GENERATION; OPERATION; SPECTRUM;

D O I：

10.1103/PhysRevLett.107.144801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Measurements of the spatial and temporal coherence of single, femtosecond x-ray pulses generated by the first hard x-ray free-electron laser, the Linac Coherent Light Source, are presented. Single-shot measurements were performed at 780 eV x-ray photon energy using apertures containing double pinholes in "diffract-and-destroy" mode. We determined a coherence length of 17 mu m in the vertical direction, which is approximately the size of the focused Linac Coherent Light Source beam in the same direction. The analysis of the diffraction patterns produced by the pinholes with the largest separation yields an estimate of the temporal coherence time of 0.55 fs. We find that the total degree of transverse coherence is 56% and that the x-ray pulses are adequately described by two transverse coherent modes in each direction. This leads us to the conclusion that 78% of the total power is contained in the dominant mode.

引用

页数：5

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