Zobrazeno 1 - 10
of 105
pro vyhledávání: '"Kurta, R."'
Autor:
Gorobtsov, O. Yu., Mukharamova, N., Lazarev, S., Chollet, M., Zhu, D., Feng, Y., Kurta, R. P., Meijer, J. -M., Williams, G., Sikorski, M., Song, S., Dzhigaev, D., Serkez, S., Singer, A., Petukhov, A. V., Vartanyants, I. A.
We demonstrate experimentally Hanbury Brown and Twiss (HBT) interferometry at a hard X-ray Free Electron Laser (XFEL) on a sample diffraction patterns. This is different from the traditional approach when HBT interferometry requires direct beam measu
Externí odkaz:
http://arxiv.org/abs/1707.08828
Autor:
Zaluzhnyy, I. A., Kurta, R. P., Sulyanova, E. A., Gorobtsov, O. Yu., Shabalin, A. G., Zozulya, A. V., Menushenkov, A. P., Sprung, M., Krowczynski, A., Gorecka, E., Ostrovskii, B. I., Vartanyants, I. A.
We report on X-ray studies of freely suspended hexatic films of three different liquid crystal compounds. By applying angular X-ray cross-correlation analysis (XCCA) to the measured diffraction patterns the parameters of the bond-orientational (BO) o
Externí odkaz:
http://arxiv.org/abs/1703.01198
Autor:
Gorobtsov, O. Yu., Mercurio, G., Brenner, G., Lorenz, U., Gerasimova, N., Kurta, R. P., Hieke, F., Skopintsev, P., Zaluzhnyy, I., Lazarev, S., Dzhigaev, D., Rose, M., Singer, A., Wurth, W., Vartanyants, I. A.
Publikováno v:
Phys. Rev. A 95, 023843 (2017)
We present a comprehensive experimental analysis of statistical properties of the self-amplified spontaneous emission (SASE) free-electron laser (FEL) FLASH at DESY in Hamburg by means of Hanbury Brown and Twiss (HBT) interferometry. The experiments
Externí odkaz:
http://arxiv.org/abs/1611.03996
X-ray diffraction studies of the bond-orientational order in the hexatic-B phase of 75OBC and 3(10)OBC compounds are presented. The temperature evolution of an angular profile of a single diffraction peak is analyzed. Close to the hexatic-B-smectic-A
Externí odkaz:
http://arxiv.org/abs/1610.01919
Autor:
Shabalin, A. G., Meijer, J. -M., Dronyak, R., Yefanov, O. M., Singer, A., Kurta, R. P., Lorenz, U., Gorobtsov, O. Y., Dzhigaev, D., Kalbfleisch, S., Gulden, J., Zozulya, A. V., Sprung, M., Petukhov, A. V., Vartanyants, I. A.
Publikováno v:
Phys. Rev. Lett. 117, 138002 (2016)
We present results of a coherent x-ray diffractive imaging experiment performed on a single colloidal crystal grain. The full three-dimensional (3D) reciprocal space map measured by an azimuthal rotational scan contained several orders of Bragg refle
Externí odkaz:
http://arxiv.org/abs/1605.09031
Publikováno v:
Phys. Rev. E 94, 030701 (2016)
An x-ray scattering approach to determine the two-dimensional (2D) pair distribution function (PDF) in partially ordered 2D systems is proposed. We derive relations between the structure factor and PDF that enable quantitative studies of positional a
Externí odkaz:
http://arxiv.org/abs/1605.06542
Spatially resolved x-ray studies of liquid crystals with strongly developed bond-orientational order
Autor:
Zaluzhnyy, I. A., Kurta, R. P., Sulyanova, E. A., Gorobtsov, O. Y., Shabalin, A. G., Zozulya, A. V., Menushenkov, A. P., Sprung, M., Ostrovskii, B. I., Vartanyants, I. A.
Publikováno v:
Phys. Rev. E 91, 042506 (2015)
We present an x-ray study of freely suspended hexatic films of the liquid crystal 3(10)OBC. Our results reveal spatial inhomogeneities of the bond-orientational (BO) order in the vicinity of the hexatic-smectic phase transition and the formation of l
Externí odkaz:
http://arxiv.org/abs/1411.6991
Autor:
Skopintsev, P., Singer, A., Bach, J., Muller, L., Beyersdorf, B., Schleitzer, S., Gorobtsov, O., Shabalin, A., Kurta, R., Dzhigaev, D., Yefanov, O. M., Glaser, L., Sakdinawat, A., Liu, Y., Grubel, G., Fromter, R., Oepen, H. P., Viefhaus, J., Vartanyants, I. A.
Publikováno v:
J. Synchrotron Rad. 21 Part 4, pages 722-728. (2014)
We present a method to characterize the spatial coherence of soft X-ray radiation from a single diffraction pattern. The technique is based on scattering from non-redundant arrays (NRA) of slits and records the degree of spatial coherence at several
Externí odkaz:
http://arxiv.org/abs/1402.6135
Autor:
Kurta, R. P., Grodd, L., Mikayelyan, E., Gorobtsov, O. Y., Fratoddi, I., Venditti, I., Sprung, M., Grigorian, S., Vartanyants, I. A.
Publikováno v:
J. Phys.: Conf. Series 499 012021 (2014)
We present results of x-ray study of spatial properties of $\pi-\pi$ conjugated networks in polymer thin films. We applied the x-ray cross-correlation analysis to x-ray scattering data from blends of poly(3-hexylthiophene) (P3HT) and gold nanoparticl
Externí odkaz:
http://arxiv.org/abs/1311.1486
Autor:
Dzhigaev, D., Lorenz, U., Kurta, R., Seiboth, F., Stankevic, T., Mickevicius, S., Singer, A., Shabalin, A., Yefanov, O., Strikhanov, M. N., Falkenberg, G., Schroer, C. G., Feidenhans`l, R., Vartanyants, I. A.
Publikováno v:
J. Phys.: Conf. Series 499 012020 (2014)
We present the ptychography reconstruction of the x-ray beam formed by nanofocusing lenses (NFLs) containing a number of phase singularities (vortices) in the vicinity of the focal plane. As a test object Siemens star pattern was used with the finest
Externí odkaz:
http://arxiv.org/abs/1311.1374