Scientific Results

Dynamics of charge-displacement channeling in intense laser-plasma interactions

Year: 2007

Authors: Kar S., Borghesi M., Cecchetti C. A., Romagnani L., Ceccherini F., Liseykina T. V., Macchi A., Jung R., Osterholz J., Willi O., Gizzi LA., Schiavi A., Galimberti M., Heathcote R.

Autors Affiliation: School of Mathematics and Physics, the Queen’s University of Belfast, Belfast BT7 1NN, UK;
Dipartimento di Fisica ‘E. Fermi’, Università di Pisa, Pisa, Italy;
Institut für Laser-und Plasmaphysik, Heinrich-Heine-Universität, Düsseldorf, Germany;
Intense Laser Irradiation Laboratory, IPCF-CNR, Pisa, Italy;
Dipartimento di Energetica, Università di Roma 1 ‘La Sapienza’, Roma, Italy;
Rutherford Appleton Laboratory, Central Laser Facility, Chilton,OX11 0QX, UK;
Institute for Computational Technologies, SD-RAS, Novosibirsk, Russia;
PolyLAB, CNR-INFM, Pisa, Italy

Abstract: The dynamics of transient electric fields generated by the interaction of high intensity laser pulses with underdense plasmas has been studied experimentally with the proton projection imaging technique. The formation of a charged channel, the propagation of its front edge and the late electric field evolution have been characterized with high temporal and spatial resolution. Particle-in-cell simulations and an electrostatic, ponderomotive model reproduce the experimental features and trace them back to the ponderomotive expulsion of electrons and the subsequent ion acceleration.


Volume: 9      Pages from: 402-1  to: 402-10

KeyWords: laser-plasma interactions; self-focusing of laser beams; proton probing; particle-in-cell simulations;
DOI: 10.1088/1367-2630/9/11/402

Citations: 23
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