The interaction of a 3 x10^19 W/cm^2 laser pulse with a metallic wire has been investigated using proton radiography. The pulse is observed to drive the propagation of a highly transient field along the wire at the speed of light. Within a temporal window of 20 ps, the current driven by this field rises to its peak magnitude 104 A before decaying to below measurable levels. Supported by particle-in-cell simulation results and simple theoretical reasoning, the transient field measured is interpreted as a chargeneutralizing disturbance propagated away from the interaction region as a result of the permanent loss of a small fraction of the laser-accelerated hot electron population to vacuum.

Laser-driven ultrafast field propagation on solid surfaces / K., Q., P. A., W., C. A., C., B., R., L., R., G., S., Lancia, L., J., F., A., P., T., T., O., W., R. J., C., D., N., M., N., P., G., D. C., C., M. N., Q., X. H., Y., P., M., T. V., L., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 102:19(2009), p. 194801.

Laser-driven ultrafast field propagation on solid surfaces

LANCIA, LIVIA;
2009

Abstract

The interaction of a 3 x10^19 W/cm^2 laser pulse with a metallic wire has been investigated using proton radiography. The pulse is observed to drive the propagation of a highly transient field along the wire at the speed of light. Within a temporal window of 20 ps, the current driven by this field rises to its peak magnitude 104 A before decaying to below measurable levels. Supported by particle-in-cell simulation results and simple theoretical reasoning, the transient field measured is interpreted as a chargeneutralizing disturbance propagated away from the interaction region as a result of the permanent loss of a small fraction of the laser-accelerated hot electron population to vacuum.
2009
01 Pubblicazione su rivista::01a Articolo in rivista
Laser-driven ultrafast field propagation on solid surfaces / K., Q., P. A., W., C. A., C., B., R., L., R., G., S., Lancia, L., J., F., A., P., T., T., O., W., R. J., C., D., N., M., N., P., G., D. C., C., M. N., Q., X. H., Y., P., M., T. V., L., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 102:19(2009), p. 194801.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/516391
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