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首页> 外文期刊>Physical review letters >Single Shot Spatial and Temporal Coherence Properties of the SLAC Linac Coherent Light Source in the Hard X-Ray Regime
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Single Shot Spatial and Temporal Coherence Properties of the SLAC Linac Coherent Light Source in the Hard X-Ray Regime

机译：硬X射线条件下SLAC直线加速器相干光源的单次时空相干特性

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摘要

We measured the transverse and longitudinal coherence properties of the Linac Coherent Light Source (LCLS) at SLAC in the hard x-ray regime at 9 keV photon energy on a single shot basis. Speckle patterns recorded in the forward direction from colloidal nanoparticles yielded the transverse coherence properties of the focused LCLS beam. Speckle patterns from a gold nanopowder recorded with atomic resolution allowed us to measure the shot-to-shot variations of the spectral properties of the x-ray beam. The focused beam is in the transverse direction fully coherent with a mode number close to 1. The average number of longitudinal modes behind the Si(lll) monochromator is about 14.5 and the average coherence time t_c = (2.0 ± 1.0) fs. The data suggest a mean x-ray pulse duration of (29 ± 14) fs behind the monochromator for (100 ± 14) fs long electron pulses.
机译：我们以单次激发在9 keV光子能量下，在硬X射线条件下测量了SLAC上直线加速器相干光源（LCLS）的横向和纵向相干特性。从胶体纳米颗粒向前记录的斑点图案产生了聚焦LCLS光束的横向相干特性。用原子分辨率记录的金纳米粉的斑点图案使我们能够测量X射线束光谱特性的逐次变化。聚焦光束在横向方向上完全相干，具有接近1的模数。Si（III）单色仪后面的平均纵向模数约为14.5，平均相干时间t_c =（2.0±1.0）fs。数据表明，对于（100±14）fs长的电子脉冲，单色仪后面的平均X射线脉冲持续时间为（29±14）fs。

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  • 来源
    《Physical review letters》 |2012年第2期|p.024801.1-024801.5|共5页
  • 作者

    C. Gutt; P. Wochner; B. Fischer; H. Conrad; M. Castro-Colin; S. Lee; F. Lehmkuhler; I. Steinke; M. Sprung; W. Roseker; D. Zhu; H. Lemke; S. Bogle; P.H. Fuoss; G.B. Stephenson; M. Cammarata; D.M. Fritz; A. Robert; G. Griibel;

  • 作者单位

    Deutsches Elektronen-Synchrotron (DESY), NotkeStrasse 85, D-22607 Hamburg, Germany;

    Max-Planck-Institut fuer Intelligente Systeme, Heisenberg Strasse 3, D-70569 Stuttgart, Germany;

    Deutsches Elektronen-Synchrotron (DESY), NotkeStrasse 85, D-22607 Hamburg, Germany;

    Deutsches Elektronen-Synchrotron (DESY), NotkeStrasse 85, D-22607 Hamburg, Germany;

    Max-Planck-Institut fuer Intelligente Systeme, Heisenberg Strasse 3, D-70569 Stuttgart, Germany;

    Deutsches Elektronen-Synchrotron (DESY), NotkeStrasse 85, D-22607 Hamburg, Germany,LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA;

    Deutsches Elektronen-Synchrotron (DESY), NotkeStrasse 85, D-22607 Hamburg, Germany;

    Deutsches Elektronen-Synchrotron (DESY), NotkeStrasse 85, D-22607 Hamburg, Germany;

    Deutsches Elektronen-Synchrotron (DESY), NotkeStrasse 85, D-22607 Hamburg, Germany;

    Deutsches Elektronen-Synchrotron (DESY), NotkeStrasse 85, D-22607 Hamburg, Germany;

    LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA;

    LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA;

    Max-Planck-Institut fuer Intelligente Systeme, Heisenberg Strasse 3, D-70569 Stuttgart, Germany;

    Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439 USA;

    Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439 USA;

    LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA;

    LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA;

    LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA;

    Deutsches Elektronen-Synchrotron (DESY), NotkeStrasse 85, D-22607 Hamburg, Germany;

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  • 正文语种 eng
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  • 关键词

    free-electron lasers; X-ray beams and x-ray optics;

    机译：自由电子激光器;X射线束和X射线光学器件;

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