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Magnetically guided fast electrons in cylindrically compressed matter |
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| Authors: | Pérez F Debayle A Honrubia J Koenig M Batani D Baton S D Beg F N Benedetti C Brambrink E Chawla S Dorchies F Fourment C Galimberti M Gizzi L A Gremillet L Heathcote R Higginson D P Hulin S Jafer R Koester P Labate L Lancaster K L MacKinnon A J MacPhee A G Nazarov W Nicolai P Pasley J Ramis R Richetta M Santos J J Sgattoni A Spindloe C Vauzour B Vinci T Volpe L |
| Institution: | LULI, école Polytechnique, CNRS, CEA, UPMC, Palaiseau, France. frederic.perez@polytechnique.edu |
| Abstract: | Fast electrons produced by a 10 ps, 160 J laser pulse through laser-compressed plastic cylinders are studied experimentally and numerically in the context of fast ignition. K(α)-emission images reveal a collimated or scattered electron beam depending on the initial density and the compression timing. A numerical transport model shows that implosion-driven electrical resistivity gradients induce strong magnetic fields able to guide the electrons. The good agreement with measured beam sizes provides the first experimental evidence for fast-electron magnetic collimation in laser-compressed matter. |
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