飞秒激光与薄箔靶相互作用中产生的相对论电子的高通量：用核技术进行表征。

High flux of relativistic electrons produced in femtosecond laser-thin foil target interactions: characterization with nuclear techniques.

作者信息

Gerbaux M, Gobet F, Aléonard M M, Hannachi F, Malka G, Scheurer J N, Tarisien M, Claverie G, Méot V, Morel P, Faure J, Glinec Y, Guemnie-Tafo A, Malka V, Manclossi M, Santos J J

机构信息

Université Bordeaux 1, CNRS-IN2P3, Centre d'Etudes Nucléaires de Bordeaux Gradignan, Chemin du Solarium, 33175 Gradignan, France.

出版信息

Rev Sci Instrum. 2008 Feb;79(2 Pt 1):023504. doi: 10.1063/1.2840017.

DOI:10.1063/1.2840017

PMID:18315296

Abstract

We present a protocol to characterize the high energy electron beam emitted in the interaction of an ultraintense laser with matter at intensities higher than 10(19) W cm(-2). The electron energies and angular distributions are determined as well as the total number of electrons produced above a 10 MeV threshold. This protocol is based on measurements with an electron spectrometer and nuclear activation techniques, combined with Monte Carlo simulations based on the GEANT3 code. The method is detailed and exemplified with data obtained with polypropylene and copper thin solid targets at a laser intensity of 2x10(19) W cm(-2). Special care is taken of the different sources of uncertainties. In particular, the reproducibility of the laser shots is considered.

摘要

我们提出了一种用于表征超强激光与强度高于(10^{19}) (W) (cm^{-2})的物质相互作用时发射的高能电子束的方案。确定了电子能量和角分布以及高于(10) (MeV)阈值产生的电子总数。该方案基于电子能谱仪测量和核活化技术，并结合基于GEANT3代码的蒙特卡罗模拟。详细介绍了该方法，并以在(2\times10^{19}) (W) (cm^{-2})激光强度下用聚丙烯和铜薄固体靶获得的数据为例进行了说明。特别关注了不同的不确定度来源。尤其考虑了激光脉冲的可重复性。