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400纳米超短脉冲激光辐照下实验与模拟Kα产率的比较。

Comparison of experimental and simulated Kalpha yield for 400 nm ultrashort pulse laser irradiation.

作者信息

Khattak F Y, Percie du Sert O A M B, Riley D, Foster P S, Divall E J, Hooker C J, Langley A J, Smith J, Gibbon P

机构信息

School of Mathematics and Physics, Queen's University of Belfast, University Road, Belfast BT7 1NN, United Kingdom.

出版信息

Phys Rev E Stat Nonlin Soft Matter Phys. 2006 Aug;74(2 Pt 2):027401. doi: 10.1103/PhysRevE.74.027401. Epub 2006 Aug 29.

DOI:10.1103/PhysRevE.74.027401
PMID:17025569
Abstract

Ti Kalpha emission yields from foils irradiated with approximately 45 fs, p-polarized pulses of a frequency-doubled Ti:sapphire laser are presented. A simple model invoking vacuum heating to predict absorption and hot electron temperature was coupled with the cross section for K -shell ionization of Ti and the Bethe-Bloch stopping power equation for electrons. The peak predicted Kalpha emission was in generally good agreement with experiment. This contrasts strongly with previous work at the fundamental frequency. Similar predictions using particle-in-cell (PIC) code simulation to estimate the number and temperature of hot electrons also gave good agreement for yield.

摘要

给出了用频率倍频的钛宝石激光器的约45飞秒、p偏振脉冲辐照箔片时的Ti Kα发射产额。一个调用真空加热来预测吸收和热电子温度的简单模型与Ti的K壳层电离截面以及电子的贝特-布洛赫阻止本领方程相结合。预测的Kα发射峰值与实验总体上吻合良好。这与之前在基频下的工作形成了强烈对比。使用粒子模拟（PIC）代码模拟来估计热电子数量和温度的类似预测在产额方面也给出了良好的吻合。

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