Design of an x-ray split- and delay-unit for the European XFEL

Roling, Sebastian; Samoylova, Liubov; Siemer, B.; Sinn, H.; Siewert, Frank; Wahlert, Frank; Wöstmann, Michael; Zacharias, H.

doi:10.1117/12.965547

Cited by 22 publications

(7 citation statements)

References 7 publications

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“…The wavefront distortion caused by the offset mirror accounts to Δw ¼ 0.056λ and the relevant spatial wavelengths of the surface profile range from 0.5 to 200 mm. The novel hard x-ray SDU will be integrated in the SASE2 undulator beam line and thus will enable temporally resolved investigations at the high energy density (HED) experiment [23,24]. Foremost, it will enable timeresolved x-ray pump/x-ray probe experiments [18,19] as well as sequential diffractive imaging [5] on a femtosecond to picosecond time scale.…”

Section: Introductionmentioning

confidence: 99%

Time-dependent wave front propagation simulation of a hard x-ray split-and-delay unit: Towards a measurement of the temporal coherence properties of x-ray free electron lasers

Roling

Zacharias

Samoylova

et al. 2014

Phys. Rev. ST Accel. Beams

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For the European x-ray free electron laser (XFEL) a split-and-delay unit based on geometrical wavefront beam splitting and multilayer mirrors is built which covers the range of photon energies from 5 keV up to 20 keV. Maximum delays between Δτ=±2.5ps at hν=20keV and up to Δτ=±23ps at hν=5keV will be possible. Time-dependent wave-optics simulations have been performed by means of Synchrotron Radiation Workshop software for XFEL pulses at hν=5keV. The XFEL radiation was simulated using results of time-dependent simulations applying the self-amplified spontaneous emission code FAST. Main features of the optical layout, including diffraction on the beam splitter edge and optics imperfections measured with a nanometer optic component measuring machine slope measuring profiler, were taken into account. The impact of these effects on the characterization of the temporal properties of XFEL pulses is analyzed. An approach based on fast Fourier transformation allows for the evaluation of the temporal coherence despite large wavefront distortions caused by the optics imperfections. In this way, the fringes resulting from time-dependent two-beam interference can be filtered and evaluated yielding a coherence time of τc=0.187fs (HWHM) for real, nonperfect mirrors, while for ideal mirrors a coherence time of τc=0.191fs (HWHM) is expected

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Section: Introductionmentioning

confidence: 99%

Time-dependent wave front propagation simulation of a hard x-ray split-and-delay unit: Towards a measurement of the temporal coherence properties of x-ray free electron lasers

Roling

Zacharias

Samoylova

et al. 2014

Phys. Rev. ST Accel. Beams

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“…Linear encoders will be installed on all translations of the upper branch to monitor the positions. The splitter cages (3), (4), channel cut cages (5), (6) and merger cages (7), (8) in the lower branch are mounted on the other vertical side of the bench. Two different concepts will be employed to split the beam, ideally in 1:1 splitting.…”

Section: Current Mechanical Designmentioning

confidence: 99%

“…It diffracts a portion of the beam intensity and transmits the remainder. The other concept is geometrical splitting where a thick crystal intersects half of the beam and diffracts that portion while the other half passes over the crystal [8] . The beam merger will be realized using the same concepts.…”

Section: Current Mechanical Designmentioning

confidence: 99%

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Design and throughput simulations of a hard x-ray split and delay line for the MID station at the European XFEL

Lu¹,

Noll²,

Roth³

et al. 2016

AIP Conference Proceedings

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“…38% in the case of initially π-polarized light. Practically, such a time delay line [53,54] can be realized with modern x-ray optics like channel-cut silicon crystals as polarizers [26,27,55] and almost 100% reflecting x-ray mirrors [56]. In Ref.…”

mentioning

confidence: 99%

Logical operations with single x-ray photons via dynamically-controlled nuclear resonances

Gunst

Keitel

Pálffy

2016

Sci Rep

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Photonic qubits lie at the heart of quantum information technology, often encoding information in their polarization state. So far, only low-frequency optical and infrared photons have been employed as flying qubits, as the resources that are at present easiest to control. With their essentially different way of interacting with matter, x-ray qubits would bear however relevant advantages: they are extremely robust, penetrate deep through materials, and can be focused down to few-nm waveguides, allowing unprecedented miniaturization. Also, x-rays are resonant to nuclear transitions, which are very well isolated from the environment and present long coherence times. Here, we show theoretically that x-ray polarization qubits can be dynamically controlled by nuclear Mössbauer resonances. The control knob is played by nuclear hyperfine magnetic fields, that allow via fast rotations precise processing of single x-ray quanta polarization. With such rotations, single-qubit and binary logical operations such as a destructive C-NOT gate can be implemented.

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Design of an x-ray split- and delay-unit for the European XFEL

Cited by 22 publications

References 7 publications

Time-dependent wave front propagation simulation of a hard x-ray split-and-delay unit: Towards a measurement of the temporal coherence properties of x-ray free electron lasers

Time-dependent wave front propagation simulation of a hard x-ray split-and-delay unit: Towards a measurement of the temporal coherence properties of x-ray free electron lasers

Design and throughput simulations of a hard x-ray split and delay line for the MID station at the European XFEL

Logical operations with single x-ray photons via dynamically-controlled nuclear resonances

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