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Magnetically assisted self-injection and radiation generation for plasma-based ...
Vieira, J.; Martins, J. L.; Pathak, V. B.; Fonseca, R. A.; Mori, W. B.; Silva, L. O.WOS:000312579500047 (Nº de Acesso Web of Science) ; “Prémio Científico ISCTE-IUL 2013” ; It is shown through analytical modeling and numerical simulations that external magnetic fields can relax the self-trapping thresholds in plasma-based accelerators. In addition, the transverse location where self-trapping occurs can be selected by adequate choice of the spatial profile of the external magnetic field. We a...
Effect of the frequency chirp on laser wakefield acceleration
Pathak, V. B.; Vieira, J.; Fonseca, R. A.; Silva, L. O.WOS:000302310200002 (Nº de Acesso Web of Science) ; “Prémio Científico ISCTE-IUL 2013” ; The role of laser frequency chirps in the laser wakefield accelerator is examined. We show that in the linear regime, the evolution of the laser pulse length is affected by the frequency chirp, and that positive (negative) chirp compresses (stretches) the laser pulse, thereby increasing (decreasing) the peak vector potent...
Magnetic Control of Particle Injection in Plasma Based Accelerators
Vieira, J.; Martins, S. F.; Pathak, V. B.; Fonseca, R. A.; Mori, W. B.; Silva, L.O.WOS:000291093600006 (Nº de Acesso Web of Science) ; “Prémio Científico ISCTE-IUL 2012” ; The use of an external transverse magnetic field to trigger and to control electron self-injection in laser- and particle-beam driven wakefield accelerators is examined analytically and through full-scale particle-in-cell simulations. A magnetic field can relax the injection threshold and can be used to control main outpu...
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