Zobrazeno 1 - 10
of 793
pro vyhledávání: '"Allain M"'
Autor:
Zhou, T., Cherukara, M. J., Kandel, S., Allain, M., Hua, N., Shpyrko, O., Takamura, Y., Cai, Z., Hruszkewycz, S. O., Holt, M. V.
We present a new approach for simulating x-ray nanobeam Bragg coherent diffraction patterns based on the Takagi-Taupin equations. Compared to conventional methods, the current approach can be universally applied to any weakly strained system includin
Externí odkaz:
http://arxiv.org/abs/2407.08146
Autor:
Frewein, M. P. K., Mason, J. K., Maier, B., Cölfen, H., Burghammer, M., Medjahed, A. A., Allain, M., Grünewald, T. A.
The crystallographic texture is a key organization feature of many technical and biological materials. In these materials, especially hierarchically structured ones, the preferential alignment of the nano constituents is heavily influencing the macro
Externí odkaz:
http://arxiv.org/abs/2404.11195
This work proposes an innovative approach to improve Bragg coherent diffraction imaging (BCDI) microscopy applied to time evolving crystals and/or non-homogeneous crystalline strain fields, identified as two major limitations of BCDI microscopy. Spec
Externí odkaz:
http://arxiv.org/abs/2403.06598
Autor:
Maddali, S., Frazer, T. D., Delegan, N., Harmon, K. J., Sullivan, S. E., Allain, M., Cha, W., Dibos, A., Poudyal, I., Kandel, S., Nashed, Y. S. G., Heremans, F. J., You, H., Cao, Y., Hruszkewycz, S. O.
We present a general analytic approach to spatially resolve the nano-scale lattice distortion field of strained and defected compact crystals with Bragg coherent x-ray diffraction imaging (BCDI). Our approach relies on fitting a differentiable forwar
Externí odkaz:
http://arxiv.org/abs/2208.00970
Akademický článek
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In this communication, a fast reconstruction algorithm is proposed for fluorescence \textit{blind} structured illumination microscopy (SIM) under the sample positivity constraint. This new algorithm is by far simpler and faster than existing solution
Externí odkaz:
http://arxiv.org/abs/1601.07851
Autor:
Hruszkewycz, S. O., Allain, M., Holt, M. V., Murray, C. E., Holt, J. R., Fuoss, P. H., Chamard, V.
We present an efficient method of imaging 3D nanoscale lattice behavior and strain fields in crystalline materials with a new methodology -- three dimensional Bragg projection ptychography (3DBPP). In this method, the 2D sample structure information
Externí odkaz:
http://arxiv.org/abs/1506.01262
Autor:
Lonjou, V., Weidenspointner, G., Knodlseder, J., Jean, P., Allain, M., von Ballmoos, P., Harris, M. J., Roques, J. P., Skinner, G. K., Teegarden, B. J., Gehrels, N., Guessoum, N., Chapuis, C., Durouchoux, Ph., Cisana, E., Valsesia, M.
The status of the analysis of the electron/positron annihilation radiation performed by INTEGRAL/SPI in the 4th GALACTIC QUADRANT is reported. We use data from the first two Galactic Center Deep Exposures (GCDE) and from the Galactic Plane Scans (GPS
Externí odkaz:
http://arxiv.org/abs/astro-ph/0411414
SPI observations of positron annihilation radiation from the 4th galactic quadrant: sky distribution
Autor:
Weidenspointner, G., Lonjou, V., Knoedlseder, J., Jean, P., Allain, M., von Ballmoos, P., Harris, M. J., Skinner, G. K., Vedrenne, G., Teegarden, B. J., Gehrels, N., Guessoum, N., Schoenfelder, V., Chapuis, C., Durouchoux, Ph., Cisana, E., Valsesia, M.
During its first year in orbit the INTEGRAL observatory performed deep exposures of the Galactic Center region and scanning observations of the Galactic plane. We report on the status of our analysis of the positron annihilation radiation from the 4t
Externí odkaz:
http://arxiv.org/abs/astro-ph/0406178
Autor:
Knödlseder, J., Valsesia, M., Allain, M., Boggs, S., Diehl, R., Jean, P., Kretschmer, K., Roques, J. -P., Schönfelder, V., Vedrenne, G., von Ballmoos, P., Weidenspointner, G., Winkler, C.
We present first results on the observation of 1809 keV gamma-ray line emission from the Cygnus X region with the SPI imaging spectrometer. Our analysis is based on data from the performance verification phase of the INTEGRAL instruments and comprise
Externí odkaz:
http://arxiv.org/abs/astro-ph/0405501