The Experts below are selected from a list of 118479 Experts worldwide ranked by ideXlab platform
Jun Fujii - One of the best experts on this subject based on the ideXlab platform.
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very efficient spin Polarization Analysis vespa new exchange scattering based setup for spin resolved arpes at ape nffa beamline at elettra
Journal of Synchrotron Radiation, 2017Co-Authors: Chiara Bigi, P Das, D Benedetti, Federico Salvador, Damjan Krizmancic, R Sergo, Andrea Martin, Giancarlo Panaccione, G Rossi, Jun FujiiAbstract:Complete photoemission experiments, enabling measurement of the full quantum set of the photoelectron final state, are in high demand for studying materials and nanostructures whose properties are determined by strong electron and spin correlations. Here the implementation of the new spin polarimeter VESPA (Very Efficient Spin Polarization Analysis) at the APE-NFFA beamline at Elettra is reported, which is based on the exchange coupling between the photoelectron spin and a ferromagnetic surface in a reflectometry setup. The system was designed to be integrated with a dedicated Scienta-Omicron DA30 electron energy analyzer allowing for two simultaneous reflectometry measurements, along perpendicular axes, that, after magnetization switching of the two targets, allow the three-dimensional vectorial reconstruction of the spin Polarization to be performed while operating the DA30 in high-resolution mode. VESPA represents the very first installation for spin-resolved ARPES (SPARPES) at the Elettra synchrotron in Trieste, and is being heavily exploited by SPARPES users since autumn 2015.
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very efficient spin Polarization Analysis vespa new exchange scattering based setup for spin resolved arpes at ape nffa beamline at elettra
arXiv: Instrumentation and Detectors, 2016Co-Authors: Chiara Bigi, P Das, D Benedetti, Federico Salvador, Damjan Krizmancic, R Sergo, Andrea Martin, Giancarlo Panaccione, G Rossi, Jun FujiiAbstract:Complete Photoemission Experiments, enabling to measure the full quantum set of the photoelectron final state, are in high demand for the study of materials and nanostructures whose properties are determined by strong electron and spin correlations. We report here on the implementation of the new spin polarimeter VESPA (Very Efficient Spin Polarization Analysis) at the APE-NFFA Beamline at Elettra that is based on the exchange coupling between the photoelectron spin and a ferromagnetic surface in a reflectometry setup. The system was designed to be integrated with a dedicated Scienta-Omicron DA30 electron energy analyzer allowing for two simultaneous reflectometry measurements, along perpendicular axes, that, after magnetization switching of the two targets allow to perform the 3D vectorial reconstruction of the spin Polarization while operating the DA30 in high resolution mode. VESPA represents the very first installation for spin resolved ARPES (SPARPES) at the Elettra synchrotron in Trieste, and is being heavily exploited by SPARPES users since fall 2015.
Mariesousai Appavou - One of the best experts on this subject based on the ideXlab platform.
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3he neutron spin filters at the jcns towards wide angle Polarization Analysis and the separation of coherent incoherent scattering from non deuterated biological objects
Chinese Journal of Physics, 2012Co-Authors: Alexander Ioffe, E Babcock, S Mattauch, V Pipich, Aurel Radulescu, Mariesousai AppavouAbstract:Polarization Analysis is an important technique for polarized neutron scattering as it is allowing to obtain the full information about the vector magnetization in the sample that is critically important for detailed understanding of physical properties of new magnetic materials. Here we compare some of the major considerations between two different methods for Polarization Analysis-supermirror based analyzers and polarized 3He neutron spin filters (3He NSF) to be used for wide-angle, high-divergence applications like high Q-range smallangle neutron scattering (SANS). We will present the state-of-the-art in-situ (or on-beam) 3He NSF avoiding the well-known problem of the time decay of 3He (and neutron beam) Polarization. In the simplified 1-dimensional version Polarization Analysis allows for the separation of coherent and incoherent scattering, making it a potentially important technique for studies of non-deuterated biological objects that themselves produce unavoidable incoherent background because of a high hydrogen content. The power of the method will be demonstrated by experiments at biological samples, where the signal to noise ratio was increased by about a factor of 100 for high Q values above 0.1 A^(−1).
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using Polarization Analysis to separate the coherent and incoherent scattering from protein samples
Biochimica et Biophysica Acta, 2010Co-Authors: A M Gaspar, Sebastian Busch, Mariesousai Appavou, Wolfgang Haeussler, R Georgii, W DosterAbstract:Polarization Analysis was used to separate experimentally the coherent and spin-incoherent nuclear static scattering functions, from a representative set of samples of interest for protein studies. This method had so far limited application in the study of amorphous materials, despite the relevance of the information that it provides. It allows, for instance, the experimental determination of the structure factor of materials containing a significant amount of hydrogen atoms, avoiding the contamination of measurements by a non-negligible incoherent background. Knowledge of the relative importance of the coherent and incoherent terms at different Q-values is also a pre-requisite for the interpretation of quasielastic neutron scattering experiments, performed at instruments in which the total dynamic scattering function is measured, such as conventional time-of-flight and backscattering spectrometers. Combining data from different instruments, it was possible to cover a wide Q-range, from the small-angle region (0.006
W Doster - One of the best experts on this subject based on the ideXlab platform.
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using Polarization Analysis to separate the coherent and incoherent scattering from protein samples
Biochimica et Biophysica Acta, 2010Co-Authors: A M Gaspar, Sebastian Busch, Mariesousai Appavou, Wolfgang Haeussler, R Georgii, W DosterAbstract:Polarization Analysis was used to separate experimentally the coherent and spin-incoherent nuclear static scattering functions, from a representative set of samples of interest for protein studies. This method had so far limited application in the study of amorphous materials, despite the relevance of the information that it provides. It allows, for instance, the experimental determination of the structure factor of materials containing a significant amount of hydrogen atoms, avoiding the contamination of measurements by a non-negligible incoherent background. Knowledge of the relative importance of the coherent and incoherent terms at different Q-values is also a pre-requisite for the interpretation of quasielastic neutron scattering experiments, performed at instruments in which the total dynamic scattering function is measured, such as conventional time-of-flight and backscattering spectrometers. Combining data from different instruments, it was possible to cover a wide Q-range, from the small-angle region (0.006
Takeshi Tsuji - One of the best experts on this subject based on the ideXlab platform.
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temporal variation and frequency dependence of seismic ambient noise on mars from Polarization Analysis
Geophysical Research Letters, 2020Co-Authors: Yudai Suemoto, Tatsunori Ikeda, Takeshi TsujiAbstract:We applied a Polarization Analysis of InSight seismic data to estimate temporal variation and frequency dependence of the Martian ambient noise field. An autocorrelation Analysis suggests that a li...
Chiara Bigi - One of the best experts on this subject based on the ideXlab platform.
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very efficient spin Polarization Analysis vespa new exchange scattering based setup for spin resolved arpes at ape nffa beamline at elettra
Journal of Synchrotron Radiation, 2017Co-Authors: Chiara Bigi, P Das, D Benedetti, Federico Salvador, Damjan Krizmancic, R Sergo, Andrea Martin, Giancarlo Panaccione, G Rossi, Jun FujiiAbstract:Complete photoemission experiments, enabling measurement of the full quantum set of the photoelectron final state, are in high demand for studying materials and nanostructures whose properties are determined by strong electron and spin correlations. Here the implementation of the new spin polarimeter VESPA (Very Efficient Spin Polarization Analysis) at the APE-NFFA beamline at Elettra is reported, which is based on the exchange coupling between the photoelectron spin and a ferromagnetic surface in a reflectometry setup. The system was designed to be integrated with a dedicated Scienta-Omicron DA30 electron energy analyzer allowing for two simultaneous reflectometry measurements, along perpendicular axes, that, after magnetization switching of the two targets, allow the three-dimensional vectorial reconstruction of the spin Polarization to be performed while operating the DA30 in high-resolution mode. VESPA represents the very first installation for spin-resolved ARPES (SPARPES) at the Elettra synchrotron in Trieste, and is being heavily exploited by SPARPES users since autumn 2015.
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very efficient spin Polarization Analysis vespa new exchange scattering based setup for spin resolved arpes at ape nffa beamline at elettra
arXiv: Instrumentation and Detectors, 2016Co-Authors: Chiara Bigi, P Das, D Benedetti, Federico Salvador, Damjan Krizmancic, R Sergo, Andrea Martin, Giancarlo Panaccione, G Rossi, Jun FujiiAbstract:Complete Photoemission Experiments, enabling to measure the full quantum set of the photoelectron final state, are in high demand for the study of materials and nanostructures whose properties are determined by strong electron and spin correlations. We report here on the implementation of the new spin polarimeter VESPA (Very Efficient Spin Polarization Analysis) at the APE-NFFA Beamline at Elettra that is based on the exchange coupling between the photoelectron spin and a ferromagnetic surface in a reflectometry setup. The system was designed to be integrated with a dedicated Scienta-Omicron DA30 electron energy analyzer allowing for two simultaneous reflectometry measurements, along perpendicular axes, that, after magnetization switching of the two targets allow to perform the 3D vectorial reconstruction of the spin Polarization while operating the DA30 in high resolution mode. VESPA represents the very first installation for spin resolved ARPES (SPARPES) at the Elettra synchrotron in Trieste, and is being heavily exploited by SPARPES users since fall 2015.
