The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
J B Rosenzweig - One of the best experts on this subject based on the ideXlab platform.
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single shot coherent diffraction imaging of microbunched relativistic electron beams for free electron Laser Applications
Physical Review Letters, 2013Co-Authors: Agostino Marinelli, M Dunning, Stephen Weathersby, E Hemsing, Dao Xiang, G Andonian, F Oshea, Jianwei Miao, C Hast, J B RosenzweigAbstract:With the advent of coherent x rays provided by the x-ray free-electron Laser (FEL), strong interest has been kindled in sophisticated diffraction imaging techniques. In this Letter, we exploit such techniques for the diagnosis of the density distribution of the intense electron beams typically utilized in an x-ray FEL itself. We have implemented this method by analyzing the far-field coherent transition radiation emitted by an inverse-FEL microbunched electron beam. This analysis utilizes an oversampling phase retrieval method on the transition radiation angular spectrum to reconstruct the transverse spatial distribution of the electron beam. This application of diffraction imaging represents a significant advance in electron beam physics, having critical Applications to the diagnosis of high-brightness beams, as well as the collective microbunching instabilities afflicting these systems.
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single shot coherent diffraction imaging of microbunched relativistic electron beams for free electron Laser Applications
Physical Review Letters, 2013Co-Authors: Agostino Marinelli, M Dunning, Stephen Weathersby, E Hemsing, Dao Xiang, G Andonian, Jianwei Miao, C Hast, F H Oshea, J B RosenzweigAbstract:With the advent of coherent x rays provided by the x-ray free-electron Laser (FEL), strong interest has been kindled in sophisticated diffraction imaging techniques. In this Letter, we exploit such techniques for the diagnosis of the density distribution of the intense electron beams typically utilized in an x-ray FEL itself. We have implemented this method by analyzing the far-field coherent transition radiation emitted by an inverse-FEL microbunched electron beam. This analysis utilizes an oversampling phase retrieval method on the transition radiation angular spectrum to reconstruct the transverse spatial distribution of the electron beam. This application of diffraction imaging represents a significant advance in electron beam physics, having critical Applications to the diagnosis of high-brightness beams, as well as the collective microbunching instabilities afflicting these systems.
Agostino Marinelli - One of the best experts on this subject based on the ideXlab platform.
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single shot coherent diffraction imaging of microbunched relativistic electron beams for free electron Laser Applications
Physical Review Letters, 2013Co-Authors: Agostino Marinelli, M Dunning, Stephen Weathersby, E Hemsing, Dao Xiang, G Andonian, F Oshea, Jianwei Miao, C Hast, J B RosenzweigAbstract:With the advent of coherent x rays provided by the x-ray free-electron Laser (FEL), strong interest has been kindled in sophisticated diffraction imaging techniques. In this Letter, we exploit such techniques for the diagnosis of the density distribution of the intense electron beams typically utilized in an x-ray FEL itself. We have implemented this method by analyzing the far-field coherent transition radiation emitted by an inverse-FEL microbunched electron beam. This analysis utilizes an oversampling phase retrieval method on the transition radiation angular spectrum to reconstruct the transverse spatial distribution of the electron beam. This application of diffraction imaging represents a significant advance in electron beam physics, having critical Applications to the diagnosis of high-brightness beams, as well as the collective microbunching instabilities afflicting these systems.
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single shot coherent diffraction imaging of microbunched relativistic electron beams for free electron Laser Applications
Physical Review Letters, 2013Co-Authors: Agostino Marinelli, M Dunning, Stephen Weathersby, E Hemsing, Dao Xiang, G Andonian, Jianwei Miao, C Hast, F H Oshea, J B RosenzweigAbstract:With the advent of coherent x rays provided by the x-ray free-electron Laser (FEL), strong interest has been kindled in sophisticated diffraction imaging techniques. In this Letter, we exploit such techniques for the diagnosis of the density distribution of the intense electron beams typically utilized in an x-ray FEL itself. We have implemented this method by analyzing the far-field coherent transition radiation emitted by an inverse-FEL microbunched electron beam. This analysis utilizes an oversampling phase retrieval method on the transition radiation angular spectrum to reconstruct the transverse spatial distribution of the electron beam. This application of diffraction imaging represents a significant advance in electron beam physics, having critical Applications to the diagnosis of high-brightness beams, as well as the collective microbunching instabilities afflicting these systems.
Anita Zeidler - One of the best experts on this subject based on the ideXlab platform.
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molecular origins of optoelectronic properties in coumarin dyes toward designer solar cell and Laser Applications
Journal of Physical Chemistry A, 2012Co-Authors: Jacqueline M Cole, Paul G Waddell, Jignesh Radia, Anita ZeidlerAbstract:Coumarin derivatives are used in a wide range of Applications, such as dye-sensitized solar cells (DSCs) and dye Lasers, and have therefore attracted considerable research interest. In order to understand the molecular origins of their optoelectronic properties, molecular structures for 29 coumarin Laser dyes are statistically analyzed. To this end, data for 25 compounds were taken from the Cambridge Structural Database and compared with data for four new crystal structures of coumarin Laser dyes [Coumarin 487 (C19H23NO2), Coumarin 498 (C16H17NO4S), Coumarin 510 (C20H18N2O2), and Coumarin 525 (C22H18N2O3)], which are reported herein. The competing contributions of different resonance states to the bond lengths of the 4- and 7-substituted coumarin Laser dyes are computed based on the harmonic oscillator stabilization energy model. Consequently, a positive correlation between the contribution of the para-quinoidal resonance state and the UV–vis peak absorption wavelength of these coumarins is revealed. Furt...
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molecular origins of optoelectronic properties in coumarin dyes toward designer solar cell and Laser Applications
Journal of Physical Chemistry A, 2012Co-Authors: Xiaogang Liu, Jacqueline M Cole, Paul G Waddell, Jignesh Radia, Tzechia Lin, Anita ZeidlerAbstract:Coumarin derivatives are used in a wide range of Applications, such as dye-sensitized solar cells (DSCs) and dye Lasers, and have therefore attracted considerable research interest. In order to understand the molecular origins of their optoelectronic properties, molecular structures for 29 coumarin Laser dyes are statistically analyzed. To this end, data for 25 compounds were taken from the Cambridge Structural Database and compared with data for four new crystal structures of coumarin Laser dyes [Coumarin 487 (C(19)H(23)NO(2)), Coumarin 498 (C(16)H(17)NO(4)S), Coumarin 510 (C(20)H(18)N(2)O(2)), and Coumarin 525 (C(22)H(18)N(2)O(3))], which are reported herein. The competing contributions of different resonance states to the bond lengths of the 4- and 7-substituted coumarin Laser dyes are computed based on the harmonic oscillator stabilization energy model. Consequently, a positive correlation between the contribution of the para-quinoidal resonance state and the UV-vis peak absorption wavelength of these coumarins is revealed. Furthermore, the perturbations of optoelectronic properties, owing to chemical substituents in these coumarin Laser dyes, are analyzed: it is found that their UV-vis peak absorption and lasing wavelengths experience a red shift, as the electron-donating strength of the 7-position substituent increases and/or the electron-withdrawing strength of the 3- or 4-position substituent rises; this conclusion is corroborated by quantum-chemical calculations. It is also revealed that the closer the relevant substituents align with the direction of the intramolecular charge transfer (ICT), the larger the spectral shifts and the higher the molar extinction coefficients of coumarin Laser dyes. These findings are important for understanding the ICT mechanism in coumarins. Meanwhile, all structure-property correlations revealed herein will enable knowledge-based molecular design of coumarins for dye Lasers and DSC Applications.
Stephen Weathersby - One of the best experts on this subject based on the ideXlab platform.
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single shot coherent diffraction imaging of microbunched relativistic electron beams for free electron Laser Applications
Physical Review Letters, 2013Co-Authors: Agostino Marinelli, M Dunning, Stephen Weathersby, E Hemsing, Dao Xiang, G Andonian, F Oshea, Jianwei Miao, C Hast, J B RosenzweigAbstract:With the advent of coherent x rays provided by the x-ray free-electron Laser (FEL), strong interest has been kindled in sophisticated diffraction imaging techniques. In this Letter, we exploit such techniques for the diagnosis of the density distribution of the intense electron beams typically utilized in an x-ray FEL itself. We have implemented this method by analyzing the far-field coherent transition radiation emitted by an inverse-FEL microbunched electron beam. This analysis utilizes an oversampling phase retrieval method on the transition radiation angular spectrum to reconstruct the transverse spatial distribution of the electron beam. This application of diffraction imaging represents a significant advance in electron beam physics, having critical Applications to the diagnosis of high-brightness beams, as well as the collective microbunching instabilities afflicting these systems.
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single shot coherent diffraction imaging of microbunched relativistic electron beams for free electron Laser Applications
Physical Review Letters, 2013Co-Authors: Agostino Marinelli, M Dunning, Stephen Weathersby, E Hemsing, Dao Xiang, G Andonian, Jianwei Miao, C Hast, F H Oshea, J B RosenzweigAbstract:With the advent of coherent x rays provided by the x-ray free-electron Laser (FEL), strong interest has been kindled in sophisticated diffraction imaging techniques. In this Letter, we exploit such techniques for the diagnosis of the density distribution of the intense electron beams typically utilized in an x-ray FEL itself. We have implemented this method by analyzing the far-field coherent transition radiation emitted by an inverse-FEL microbunched electron beam. This analysis utilizes an oversampling phase retrieval method on the transition radiation angular spectrum to reconstruct the transverse spatial distribution of the electron beam. This application of diffraction imaging represents a significant advance in electron beam physics, having critical Applications to the diagnosis of high-brightness beams, as well as the collective microbunching instabilities afflicting these systems.
Jianwei Miao - One of the best experts on this subject based on the ideXlab platform.
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single shot coherent diffraction imaging of microbunched relativistic electron beams for free electron Laser Applications
Physical Review Letters, 2013Co-Authors: Agostino Marinelli, M Dunning, Stephen Weathersby, E Hemsing, Dao Xiang, G Andonian, F Oshea, Jianwei Miao, C Hast, J B RosenzweigAbstract:With the advent of coherent x rays provided by the x-ray free-electron Laser (FEL), strong interest has been kindled in sophisticated diffraction imaging techniques. In this Letter, we exploit such techniques for the diagnosis of the density distribution of the intense electron beams typically utilized in an x-ray FEL itself. We have implemented this method by analyzing the far-field coherent transition radiation emitted by an inverse-FEL microbunched electron beam. This analysis utilizes an oversampling phase retrieval method on the transition radiation angular spectrum to reconstruct the transverse spatial distribution of the electron beam. This application of diffraction imaging represents a significant advance in electron beam physics, having critical Applications to the diagnosis of high-brightness beams, as well as the collective microbunching instabilities afflicting these systems.
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single shot coherent diffraction imaging of microbunched relativistic electron beams for free electron Laser Applications
Physical Review Letters, 2013Co-Authors: Agostino Marinelli, M Dunning, Stephen Weathersby, E Hemsing, Dao Xiang, G Andonian, Jianwei Miao, C Hast, F H Oshea, J B RosenzweigAbstract:With the advent of coherent x rays provided by the x-ray free-electron Laser (FEL), strong interest has been kindled in sophisticated diffraction imaging techniques. In this Letter, we exploit such techniques for the diagnosis of the density distribution of the intense electron beams typically utilized in an x-ray FEL itself. We have implemented this method by analyzing the far-field coherent transition radiation emitted by an inverse-FEL microbunched electron beam. This analysis utilizes an oversampling phase retrieval method on the transition radiation angular spectrum to reconstruct the transverse spatial distribution of the electron beam. This application of diffraction imaging represents a significant advance in electron beam physics, having critical Applications to the diagnosis of high-brightness beams, as well as the collective microbunching instabilities afflicting these systems.
