000001468 001__ 1468
000001468 005__ 20190205135718.0
000001468 02470 $$2DOI$$a10.1117/12.2265750
000001468 037__ $$aPROCEEDING-2017-021
000001468 041__ $$aeng
000001468 245__ $$aA hard x-ray split-and-delay unit for the HED instrument at the European XFEL
000001468 260__ $$c2017
000001468 269__ $$a2017
000001468 336__ $$aProceedings
000001468 520__ $$aFor the High Energy Density Instrument (HED) at the European XFEL a hard x-ray split-and-delay unit (SDU) is built covering photon energies in the range between 5 keV and 24 keV. This SDU enables time-resolved x-ray pump / x-ray probe experiments as well as sequential diffractive imaging on a femtosecond to picosecond time scale. The set-up is based on wavefront splitting that has successfully been implemented at an autocorrelator at FLASH. The x-ray FEL pulses will be split by a sharp edge of a silicon mirror coated with Mo/B4C and W/B4C multilayers. Both partial beams then pass variable delay lines. For different photon energies the angle of incidence onto the multilayer mirrors is adjusted in order to match the Bragg condition. Hence, maximum delays between +/- 1 ps at 24 keV and up to +/- 23 ps at 5 keV will be possible. Time-dependent wave-optics simulations are performed with Synchrotron Radiation Workshop (SRW) software. The XFEL radiation is simulated using the output of the time-dependent SASE code FAST. For the simulations diffraction on the edge of the beam-splitter as well as height and slope errors of all eight mirror surfaces are taken into account. The impact of these effects on the ability to focus the beam by means of compound refractive lenses (CRL) is analyzed.
000001468 546__ $$aEnglish
000001468 6531_ $$amirrors
000001468 6531_ $$amultilayers
000001468 6531_ $$aX-rays
000001468 6531_ $$ahard x-rays
000001468 6531_ $$abeam splitters
000001468 6531_ $$apicosecond phenomena
000001468 6531_ $$awavefronts
000001468 655__ $$aMatter under extreme conditions, warm dense matter, and plasmas
000001468 655__ $$aHard condensed matter, structure, and dynamics
000001468 655__ $$aHard condensed matter and electronic properties
000001468 655__ $$aX-ray scattering, X-ray optics, and instrumentation techniques
000001468 690__ $$aEuXFEL facility
000001468 7001_ $$aRoling, Sebastian
000001468 7001_ $$aKärcher, Victor
000001468 7001_ $$01120$$aSamoylova, Liubov
000001468 7001_ $$01212$$aAppel, Karen
000001468 7001_ $$aBraun, Stefan
000001468 7001_ $$aGawlitza, Peter
000001468 7001_ $$aSiewert, Frank
000001468 7001_ $$01273$$aZastrau, Ulf
000001468 7001_ $$aRollnik, Matthias
000001468 7001_ $$aWahlert, Frank
000001468 7001_ $$aZacharias, Helmut
000001468 7112_ $$aSPIE Optics + Optoelectronics 2017$$cPrague$$d2017-06-20$$m2017-06-20
000001468 773__ $$j10237$$q1023713$$tProc. SPIE
000001468 790__ $$aEuXFEL staff
000001468 790__ $$aOther
000001468 85641 $$uhttps://www.spiedigitallibrary.org/conference-proceedings-of-spie/10237/1/A-hard-x-ray-split-and-delay-unit-for-the/10.1117/12.2265750.full
000001468 8560_ $$fkurt.ament@xfel.eu
000001468 8564_ $$s876189$$uhttps://xfel.tind.io/record/1468/files/1023713.pdf
000001468 8564_ $$s2251235$$uhttps://xfel.tind.io/record/1468/files/1023713.pdf?subformat=pdfa$$xpdfa
000001468 900__ $$aInstrument HED
000001468 980__ $$aPROCEEDING