Investigation of QED Effects With Varying Z in Thin Foil Targets
Investigation of QED Effects With Varying Z in Thin Foil Targets
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DOI：
10.1109/tps.2020.3026781
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发表时间：
2021-02
影响因子：
1.5
通讯作者：
S. Chintalwad;S. Krishnamurthy;B. Ramakrishna;S. Morris;C. Ridgers
中科院分区：
文献类型：
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作者：
S. Chintalwad;S. Krishnamurthy;B. Ramakrishna;S. Morris;C. Ridgers
利用粒子模拟方法研究了强激光与等离子体相互作用中的量子电动力学（QED）效应，特别是正负电子对的产生。使用线性偏振强激光脉冲以4 × 10^{23}$ W cm−2的强度照射薄箔（1- $\mu \text{m}$）。一个扫描的目标与不同的$Z$（铝，铜，和Au）的影响进行了研究，以确定目标$Z$ /密度对电子-正电子对生产。Al和Cu靶产生的对的总数分别为1014和1013。在Au的情况下，我们没有观察到任何对生产发生。我们还计算了在这些目标中的电子能量的变化。结果表明，靶Z在激光相互作用中起着重要的作用，本文对此进行了解释。
Quantum electrodynamics (QED) effects in intense laser–plasma interaction were investigated using particle-in-cell (PIC) simulations, specifically the generation of electron–positron pairs. Linearly polarized intense laser pulses were used to irradiate a thin foil (1- $\mu \text{m}$ ) with an intensity of $4\times 10^{23}$ W cm−2. A scan of targets with varying $Z$ (Al, Cu, and Au) is investigated to determine the effect of target $Z$ /density on electron–positron pair production. The total number of pairs created for Al and Cu targets is 1014 and 1013, respectively. In the case of Au, we did not observe any pair production to occur. We have also calculated the variation in electron energy in these targets. The results indicate that target $Z$ plays a very important role with the laser interaction in the pair production process, which will be explained in this article.