The level of second-harmonic light emitted from a laser-exploded foil plasma at nominal irradiance up to 3.10(13) W/cm2 was found to be extremely sensitive to both target position and irradiance on target. Either a small target displacement or a small increase in irradiance resulted in a jump of the 2omega level of more than three orders of magnitude. Correspondingly, a transition was observed from a 2omega source pattern clearly signed by the original laser spot pattern to unstable patterns of filaments whose size is consistent with the maximum growth of the instability.
|Autori:||BIANCALANA V; BORGHESI M; CHESSA P; DEHA I; GIULIETTI A; GIULIETTI D; GIZZI LA; WILLI O|
|Titolo:||TRANSITION TO FILAMENTARY REGIME IN LASER-PLASMA INTERACTION EVIDENCED BY 2-OMEGA-EMISSION|
|Anno del prodotto:||1993|
|Digital Object Identifier (DOI):||10.1209/0295-5075/22/3/003|
|Appare nelle tipologie:||1.1 Articolo in rivista|