Pompili R, Anania M P, Bisesto F, Botton M, Castellano M, Chiadroni E, Cianchi A, Curcio A, Ferrario M, Galletti M, Henis Z, Petrarca M, Schleifer E, Zigler A
Opt Express. 2016 Dec 26;24(26):29512-29520. doi: 10.1364/OE.24.029512.
The interaction of a high-intensity short-pulse laser with thin solid targets produces electron jets that escape the target and positively charge it, leading to the formation of the electrostatic potential that in turn governs the ion acceleration. The typical timescale of such phenomena is on the sub-picosecond level. Here we show, for the first time, temporally-resolved measurements of the first released electrons that escaped from the target, so-called fast electrons. Their total charge, energy and temporal profile are provided by means of a diagnostics based on Electro-Optical Sampling with temporal resolution below 100 fs.
高强度短脉冲激光与薄固体靶的相互作用会产生电子射流，这些电子射流会逃离靶并使其带正电，从而导致静电势的形成，而静电势又反过来控制离子加速。此类现象的典型时间尺度处于亚皮秒级别。在此，我们首次展示了对从靶中逸出的首批电子（即所谓的快电子）的时间分辨测量。通过基于电光采样的诊断方法，以低于100飞秒的时间分辨率提供了它们的总电荷、能量和时间分布。
