Development of a hard x-ray split-delay system at the Linac Coherent Light Source

The ability to split femtosecond free electron laser pulses and recombine them with a precisely adjustable delay has numerous scientific applications such as X-ray Photon Correlation Spectroscopy and X-ray pump X-ray probe measurements. A wavefront-splitting based hard X-ray split-delay system is currently under development at the Linac Coherent Light Source. The design configuration uses a series of Si(220) crystal reflections in the horizontal scattering geometry. It covers an energy range between 6.5 and 13 keV, a delay range from -30 ps up to 500 ps at 8 keV. The design features two planar air bearing based linear stage delay lines for improved stability and accuracy during the delay adjustments in order to maintain spatial overlap of the two branches during a delay scan. We present the basic design concept, tolerance analysis, and estimated performance of the system.

[1]  Marc Messerschmidt,et al.  A demonstration of multi-bunch operation in the LCLS , 2010 .

[2]  Kazuto Yamauchi,et al.  Development of split-delay x-ray optics using Si(220) crystals at SACLA , 2014, Optics & Photonics - Optical Engineering + Applications.

[3]  F Siewert,et al.  Spatio-temporal coherence of free electron laser pulses in the soft x-ray regime. , 2008, Optics express.

[4]  Horst Schulte-Schrepping,et al.  Performance of a picosecond x-ray delay line unit at 8.39 keV. , 2009, Optics letters.

[5]  Frank Siewert,et al.  Design of an x-ray split- and delay-unit for the European XFEL , 2012, Other Conferences.

[6]  Nora Berrah,et al.  Fresh-slice multicolour X-ray free-electron lasers , 2016, Nature Photonics.

[7]  C. Behrens,et al.  High-intensity double-pulse X-ray free-electron laser , 2015, Nature Communications.

[8]  Kazuto Yamauchi,et al.  Wavelength-tunable split-and-delay optical system for hard X-ray free-electron lasers. , 2016, Optics express.

[9]  Paul H. Fuoss,et al.  Hard x-ray delay line for x-ray photon correlation spectroscopy and jitter-free pump-probe experiments at LCLS , 2012, Other Conferences.

[10]  Marcin Sikorski,et al.  Recent development of thin diamond crystals for X-ray FEL beam-sharing , 2013, Europe Optics + Optoelectronics.

[11]  Kazuto Yamauchi,et al.  A Bragg beam splitter for hard x-ray free-electron lasers. , 2013, Optics express.

[12]  Nora Berrah,et al.  Mirror-based soft x-ray split-and-delay system for femtosecond pump-probe experiments at LCLS , 2012, Other Conferences.

[13]  T. Ishikawa,et al.  A compact X-ray free-electron laser emitting in the sub-ångström region , 2012, Nature Photonics.

[14]  D. M. Fritz,et al.  Following the dynamics of matter with femtosecond precision using the X-ray streaking method , 2015, Scientific Reports.

[15]  Garth J. Williams,et al.  Transient lattice contraction in the solid-to-plasma transition , 2016, Science Advances.

[16]  Christian Gutt,et al.  XPCS at the European X-ray free electron laser facility , 2007 .

[17]  Sébastien Boutet,et al.  Linac Coherent Light Source: The first five years , 2016 .

[18]  W. Schlotter,et al.  Longitudinal coherence measurements of an extreme-ultraviolet free-electron laser. , 2010, Optics letters.

[19]  T Autenrieth,et al.  Measuring temporal speckle correlations at ultrafast x-ray sources. , 2009, Optics express.

[20]  D. Ratner,et al.  First lasing and operation of an ångstrom-wavelength free-electron laser , 2010 .

[21]  Takashi Kameshima,et al.  Observation of femtosecond X-ray interactions with matter using an X-ray–X-ray pump–probe scheme , 2016, Proceedings of the National Academy of Sciences.

[22]  Yiping Feng,et al.  A hard x-ray transmissive single-shot spectrometer for FEL sources , 2012, Other Conferences.

[23]  Marcin Sikorski,et al.  The X-ray Correlation Spectroscopy instrument at the Linac Coherent Light Source , 2013, Journal of synchrotron radiation.