Results 51 to 60 of about 377,794 (331)

SUPERLUMINAL SYNCHROTRON RADIATION

Resource-Efficient Technologies, 2018
To avoid complex computations based on wide Fourier expansions, the electromagnetic field of synchrotron radiation (SR) was analyzed using Lienard–Wiechert potentials in this work. The retardation equation was solved for ultrarelativistic movement of rotating charge at distances up to the trajectory radius.
Aginian, M. A., Arutunian, S. G., Lazareva, E. G., Margaryan, A. V.   +3 more
openaire   +3 more sources

Gamma Ray Burst Prompt Emission Variability in Synchrotron and Synchrotron Self-Compton Lightcurves

, 2012
Gamma Ray Burst prompt emission is believed to originate from electrons accelerated in a highly relativistic outflow. "Internal shocks" due to collisions between shells ejected by the central engine is a leading candidate for electron acceleration. While
Resmi, L., Zhang, B.
core   +1 more source

Simulations of particle acceleration beyond the classical synchrotron burnoff limit in magnetic reconnection: An explanation of the Crab flares [PDF]

, 2013
It is generally accepted that astrophysical sources cannot emit synchrotron radiation above 160 MeV in their rest frame. This limit is given by the balance between the accelerating electric force and the radiation reaction force acting on the electrons ...
Begelman, Mitchell C., Cerutti, Benoit, Uzdensky, Dmitri A., Werner, Gregory R.   +3 more
core   +1 more source

Optical clearing: an alternative sample preparation method for propagation based phase contrast μCT

Frontiers in Physics
Synchrotron radiation propagation-based phase-contrast micro-computed tomography (SRμCT) has been used increasingly for detailed characterization of tissue specimens, alternative to classical histology.
Md Motiur Rahman Sagar, Angelika Svetlove, Lorenzo D’Amico, Lorenzo D’Amico, Diana Pinkert-Leetsch, Jeannine Missbach-Guentner, Elena Longo, Giuliana Tromba, Hanibal Bohnenberger, Frauke Alves, Frauke Alves, Frauke Alves, Christian Dullin, Christian Dullin, Christian Dullin, Christian Dullin   +15 more
doaj   +1 more source

Klein-Nishina effects on the high-energy afterglow emission of gamma-ray bursts

, 2009
Extended high-energy(>100MeV) gamma-ray emission that lasts much longer than the prompt sub-MeV emission has been detected from quite a few gamma-ray bursts (GRBs) by Fermi Large Area Telescope (LAT) recently.
Abdo, Abdo, Abdo, De Pasquale, Gao, Ghisellini, Gou, Granot, Hao-Ning He, He, Kumar, Kumar, Li, Nakar, Pe'er, Sari, Sari, Wang, Wang, Wang, Xiang-Yu Wang, Xue-Feng Wu, Zhang, Zhuo Li, Zi-Gao Dai   +24 more
core   +1 more source

Gamma-Ray Burst Afterglow: Polarization and Analytic Light Curves [PDF]

, 1998
GRB afterglow polarization is discussed. We find an observable, up to 10%, polarization, if the magnetic field coherence length grows at about the speed of light after the field is generated at the shock front.
Andrei Gruzinov, Eli Waxman, Krall N. A., Sagdeev R. Z., Wijers A. M. J.   +4 more
core   +2 more sources

Influence of a Standard Heat Treatment on the Microstructure and Properties of Inconel X‐750 Produced by Laser Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Ni‐base superalloys produced using additive manufacturing (AM) have a different response to heat treatments when compared to their conventional counterparts. Due to such unpredictability, various alloys with industrial interest are currently overlooked in most prior AM research.
Guilherme Maziero Volpato, Adriano de Souza Pinto Pereira, Steffen Neumeier, Dachamir Hotza, Mathias Göken, Ulrich Tetzlaff, Márcio Celso Fredel   +6 more
wiley   +1 more source

Interpretation of the unprecedentedly long-lived high-energy emission of GRB 130427A

, 2013
High energy photons (>100 MeV) are detected by the Fermi/LAT from GRB 130427A up to almost one day after the burst, with an extra hard spectral component being discovered in the high-energy afterglow. We show that this hard spectral component arises from
Liu, Ruo-Yu, Wang, Xiang-Yu, Wu, Xue-Feng   +2 more
core   +1 more source

Sub-nanosecond, time-resolved, broadband infrared spectroscopy using synchrotron radiation [PDF]

, 2001
A facility for sub-nanosecond time-resolved (pump-probe) infrared spectroscopy has been developed at the National Synchrotron Light Source of Brookhaven National Laboratory.
D. B. Tanner, D. H. Reitze, Doyle O. L., Feenstra B. J., Finkman E., G. L. Carr, Han P. Y., J. D. LaVeigne, Johnson M., Lim J. H., Lobo R. P. S. M., Mihailovic D., Mroczkowski J. A., R. P. S. M. Lobo, Shen W. Z.   +14 more
core   +2 more sources

A Simulative Approach for the Prediction of Mesoscale Residual Stress Fields in Solution‐Strengthened Ferritic Ductile Iron

Advanced Engineering Materials, EarlyView.
This study presents a 3D representative volume element‐based simulation approach to predict mesoscopic residual stress and strain fields in silicon solid solution‐strengthened ductile cast iron. By modeling phase transformation kinetics with an enhanced Johnson–Mehl–Avrami–Kolmogorov model, the effects of varying cooling rates on residual stresses are ...
Lutz Horbach, Oliver Schenk, Valérian Iss, Ali Rajaei, Jiali Zhang, Felix Weber, Christoph Broeckmann   +6 more
wiley   +1 more source