Search

Your search keyword '"A K S, Schulze"' showing total 8 results
Start Over Author "A K S, Schulze" Language english
8 results on '"A K S, Schulze"'

1. Scanning high-sensitive x-ray polarization microscopy

Author

B Marx-Glowna, B Grabiger, R Lötzsch, I Uschmann, A T Schmitt, K S Schulze, A Last, T Roth, S Antipov, H-P Schlenvoigt, I Sergueev, O Leupold, R Röhlsberger, and G G Paulus

Subjects
x-ray polarimetry, x-ray lenses, x-ray polarization microscopy, x-ray optics, channel-cut crystals, Science, Physics, QC1-999
Abstract

We report on the realization of an extremely sensitive x-ray polarization microscope, allowing to detect tiniest polarization changes of 1 in 100 billion (10 ^−11 ) with a μ m-size focused beam. The extreme degree of polarization purity places the most stringent requirements on the orientation of the polarizer and analyzer crystals as well as the composition and the form fidelity of the lenses, which must not exhibit any birefringence. The results show that these requirements are currently only met by polymer lenses. Highly sensitive scanning x-ray polarization microscopy thus is established as a new method. It can provide new insights in a wide range of applications ranging from quantum electrodynamics and quantum optics to x-ray spectroscopy, materials research, and laser physics.

Published
2022
Full Text
View/download PDF

2. Fundamental limitations of the polarization purity of x rays

Author

K. S. Schulze

Subjects
Applied optics. Photonics, TA1501-1820
Abstract

For a few years, x-ray polarimeters have been discussed and even used as a key method for the investigation of fundamental physical questions, from quantum electrodynamics to solid state physics. However, the sensitivity of optical instruments is limited. In the case of x-ray polarimeters, this limitation is connected with the polarization purity. This article quantifies two fundamental effects which lead to a limited polarization purity and, thus, to a limited sensitivity: the divergence of the source and multiple-wave diffraction inside the polarizer crystals. A comparison shows that the current best polarization purities realized in the x-ray range are limited by these effects. The quantitative knowledge of their influence, however, can improve the purity by two orders of magnitude in future polarimetric experiments.

Published
2018
Full Text
View/download PDF

3. Wavelength-dispersive spectroscopy in the hard x-ray regime of a heavy highly-charged ion: the 1s Lamb shift in hydrogen-like gold

Author

T Gassner, M Trassinelli, R Heß, U Spillmann, D Banaś, K-H Blumenhagen, F Bosch, C Brandau, W Chen, Chr Dimopoulou, E Förster, R E Grisenti, A Gumberidze, S Hagmann, P-M Hillenbrand, P Indelicato, P Jagodzinski, T Kämpfer, Chr Kozhuharov, M Lestinsky, D Liesen, Yu A Litvinov, R Loetzsch, B Manil, R Märtin, F Nolden, N Petridis, M S Sanjari, K S Schulze, M Schwemlein, A Simionovici, M Steck, Th Stöhlker, C I Szabo, S Trotsenko, I Uschmann, G Weber, O Wehrhan, N Winckler, D F A Winters, N Winters, E Ziegler, and H F Beyer

Subjects
quantum electrodynamics test, strong Coulomb field, energy-dispersive x-ray spectroscopy, storage rings, Science, Physics, QC1-999
Abstract

Accurate spectroscopy of highly-charged high- Z ions in a storage ring is demonstrated to be feasible by the use of specially adapted crystal optics. The method has been applied for the measurement of the 1 s Lamb shift in hydrogen-like gold (Au ^+78 ) in a storage ring through spectroscopy of the Lyman x-rays. This measurement represents the first result obtained for a high- Z element using high-resolution wavelength-dispersive spectroscopy in the hard x-ray regime, paving the way for sensitivity to higher-order QED effects.

Published
2018
Full Text
View/download PDF

4. Ultra-high precision x-ray polarimetry with artificial diamond channel cuts at the beam divergence limit

Author

Hendrik Bernhardt, Dimitrios Bessas, R. Loetzsch, Ralf Röhlsberger, Thomas Stöhlker, Berit Marx-Glowna, Rudolf Rüffer, Benjamin Grabiger, Annika T. Schmitt, Gerhard G. Paulus, Ingo Uschmann, K. S. Schulze, Hans-Christian Wille, Aleksandr I. Chumakov, and European Synchrotron Radiation Facility (ESRF)

Subjects
Materials science, business.industry, Linear polarization, X-ray, Polarimetry, Diamond, 02 engineering and technology, Polarizer, engineering.material, 021001 nanoscience & nanotechnology, Polarization (waves), 01 natural sciences, [PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph], law.invention, Optics, law, 0103 physical sciences, engineering, ddc:530, 010306 general physics, 0210 nano-technology, business, Diamond crystal, Beam divergence
Abstract

Physical review research 2(2), 023365 (2020). doi:10.1103/PhysRevResearch.2.023365, We report on the use of synthetic single-crystal diamonds for high definition x-ray polarimetry. The diamonds are precision mounted to form artificial channel-cut crystals (ACCs). Each ACC supports four consecutive reflections with a scattering angle 2ΘB of 90∘. We achieved a polarization purity of 3.0×10−10 at beamline ID18 of the European Synchrotron Radiation Facility (ESRF). When the x-ray beam's horizontal divergence was reduced through additional collimation from 17 to 8.4μrad, the polarization purity improved to 1.4×10−10. Precision x-ray polarimetry thus has reached the limit, where the purity is determined by the divergence of the beam. In particular, this result is important for polarimetry at fourth generation x-ray sources, which provide diffraction-limited x-ray beams. The sensitivity expected as a consequence of the present work will pave the way for exploring new physics such as the investigation of vacuum birefringence., Published by APS, College Park, MD

Published
2020
Full Text
View/download PDF

5. High‐resolution wavelength‐dispersive spectroscopy of K‐shell transitions in hydrogen‐like gold

Author

Csilla I. Szabo, Wanqiu Chen, N. Petridis, S. Hagmann, R. Heß, K. S. Schulze, G. Weber, C. Dimopoulou, U. Spillmann, F. Nolden, Michael Lestinsky, S. Trotsenko, O. Wehrhan, D. Liesen, Ingo Uschmann, N. Winters, Renate Märtin, M. Schwemlein, T. Kämpfer, Alexandre Simionovici, K.-H. Blumenhagen, P. M. Hillenbrand, E. Ziegler, T. Gassner, Martino Trassinelli, C. Brandau, Dariusz Banaś, M. Steck, A. Gumberidze, Paul Indelicato, R. Loetzsch, M. S. Sanjari, Yu. A. Litvinov, Nicolas Winckler, F. Bosch, H. F. Beyer, Th. Stöhlker, Eckhart Förster, Danyal Winters, Robert E. Grisenti, B. Manil, Paweł P. Jagodziński, Helmholtz zentrum für Schwerionenforschung GmbH (GSI), Institut des Nanosciences de Paris (INSP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Agrégats et surfaces sous excitations intenses (INSP-E10), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Ottawa Research & Development Centre, Science & Technology Branch, Agriculture and Agri-Food [Ottawa] (AAFC), Laboratoire Kastler Brossel (LKB (Jussieu)), Université Pierre et Marie Curie - Paris 6 (UPMC)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Institute of Physics [Kielce], Jan Kochanowski University, Laboratoire de Physique des Lasers (LPL), Université Paris 13 (UP13)-Centre National de la Recherche Scientifique (CNRS), Institut für Kernphysik, Goethe-Universität Frankfurt am Main, Laboratoire de Sciences de la Terre (LST), École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Université Paris 06, X-ray Optics Croup Institute of Optics and Quantum Electronics, Friedrich-Schiller-Universität = Friedrich Schiller University Jena [Jena, Germany], Agriculture and Agri-Food (AAFC), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), and École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL)

Subjects
Materials science, Hydrogen, [PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], Analytical chemistry, Electron shell, chemistry.chemical_element, High resolution, 01 natural sciences, 010305 fluids & plasmas, Wavelength-dispersive X-ray spectroscopy, chemistry, 0103 physical sciences, 010306 general physics, Spectroscopy, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2019
Full Text
View/download PDF

6. Realizing total reciprocity violation in the phase for photon scattering

Author

L. Deák, Hartmut Spiering, Ingo Uschmann, Hans-Christian Wille, Tamás Fülöp, Dániel G. Merkel, D. L. Nagy, K. S. Schulze, Szilárd Sajti, László Bottyán, Wigner Research Centre for Physics [Budapest], Hungarian Academy of Sciences (MTA), Budapest University of Technology and Economics [Budapest] (BME), European Synchrotron Radiation Facility (ESRF), Helmholtz-Institut Jena, Johannes Gutenberg - Universität Mainz (JGU), and Deutsches Elektronen-Synchrotron [Hamburg] (DESY)

Subjects
Physics, Multidisciplinary, Scattering, Detector, Synchrotron radiation, ANALYZER, NUCLEAR-RESONANCE, 01 natural sciences, Article, POLARIZER, 010305 fluids & plasmas, Scattering amplitude, SYNCHROTRON-RADIATION, Quantum mechanics, 0103 physical sciences, ddc:000, Rotational invariance, [CHIM]Chemical Sciences, Scattering theory, OPTICS, 010306 general physics, Quantum, QUANTUM, Reciprocity (cultural anthropology)
Abstract

Scientific reports 7, 43114 (2017). doi:10.1038/srep43114, Reciprocity is when wave or quantum scattering satisfies a symmetry property, connecting a scattering process with the reversed one. While reciprocity involves the interchange of source and detector, it is fundamentally different from rotational invariance, and is a generalization of time reversal invariance, occurring in absorptive media as well. Due to its presence at diverse areas of physics, it admits a wide variety of applications. For polarization dependent scatterings, reciprocity is often violated, but violation in the phase of the scattering amplitude is much harder to experimentally observe than violation in magnitude. Enabled by the advantageous properties of nuclear resonance scattering of synchrotron radiation, we have measured maximal, i.e., 180-degree, reciprocity violation in the phase. For accessing phase information, we introduced a new version of stroboscopic detection. The scattering setting was devised based on a generalized reciprocity theorem that opens the way to construct new types of reciprocity related devices., Published by Macmillan, London

Published
2017
Full Text
View/download PDF

7. High purity x-ray polarimetry with single-crystal diamond

Author

Hendrik Bernhardt, T. Kämpfer, Eckhart Förster, Benjamin Grabiger, Gerhard G. Paulus, Ingo Uschmann, Thomas Stöhlker, Johann Haber, Berit Marx-Glowna, R. Loetzsch, Carsten Detlefs, K. S. Schulze, and Ralf Röhlsberger

Subjects
Materials science, Physics and Astronomy (miscellaneous), business.industry, Polarimetry, Bragg's law, Diamond, Synchrotron radiation, Polarimeter, 02 engineering and technology, Undulator, Polarizer, engineering.material, 021001 nanoscience & nanotechnology, 01 natural sciences, Synchrotron, law.invention, Optics, law, 0103 physical sciences, engineering, ddc:530, 010306 general physics, 0210 nano-technology, business
Abstract

Applied physics letters 109(12), 121106(2016). doi:10.1063/1.4962806, We report on the use of synthetic single-crystal diamonds for high purity x-ray polarimetry to improve the polarization purity of present-day x-ray polarimeters. The polarimeter setup consists of a polarizer and an analyzer, each based on two parallel diamond crystals used at a Bragg angle close to 45°. The experiment was performed using one (400) Bragg reflection on each diamond crystal and synchrotron undulator radiation at an x-ray energy of 9838.75 eV. A polarization purity of 8.9 × 10$^{−10}$ was measured at the European Synchrotron Radiation Facility, which is the best value reported for two-reflection polarizer/analyzer setups. This result is encouraging and is a first step to improve the resolution of x-ray polarimeters further by using diamond crystal polarizers and analyzers with four or six consecutive reflections., Published by American Inst. of Physics, Melville, NY

Published
2016
Full Text
View/download PDF

8. Tunable sub-luminal propagation of narrowband x-ray pulses

Author

Gerhard G. Paulus, Jörg Evers, Johann Haber, Rudolf Rüffer, Kilian Peter Heeg, Daniel Schumacher, R. Loetzsch, Hans-Christian Wille, Ralf Röhlsberger, Lars Bocklage, Ingo Uschmann, and K. S. Schulze

Subjects
Physics, Quantum Physics, Photon, Atomic Physics (physics.atom-ph), business.industry, Astrophysics::High Energy Astrophysical Phenomena, Cavity quantum electrodynamics, X-ray, FOS: Physical sciences, General Physics and Astronomy, Synchrotron radiation, Nonlinear optics, Physics - Atomic Physics, Optics, Planar, ddc:550, Group velocity, Thin film, Quantum Physics (quant-ph), business
Abstract

Group velocity control is demonstrated for x-ray photons of 14.4 keV energy via a direct measurement of the temporal delay imposed on spectrally narrow x-ray pulses. Sub-luminal light propagation is achieved by inducing a steep positive linear dispersion in the optical response of ${}^{57}$Fe M\"ossbauer nuclei embedded in a thin film planar x-ray cavity. The direct detection of the temporal pulse delay is enabled by generating frequency-tunable spectrally narrow x-ray pulses from broadband pulsed synchrotron radiation. Our theoretical model is in good agreement with the experimental data., Comment: 8 pages, 4 figures

Published
2014
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results