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arXiv 1409.5574physics.plasm-ph
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laser产生的超相对论等离子体中高能光子发射的影响:实时同步加速器模拟

Effects of high energy photon emissions in laser generated ultra-relativistic plasmas: real-time synchrotron simulations

Erik Wallin, Arkady Gonoskov, Mattias Marklund

摘要:

我们模拟了在强激光等离子体相互作用中由于相对论带电粒子运动而产生的高能光子发射。这是在粒子单元代码中完成的,对于该代码,由于有限的时间步长和网格大小,高频辐射通常不能被解析。同步辐射光谱的一个简单的表达式一起使用的Monte-Carlo方法的发射度。我们扩展了以前的工作,允许任意领域,考虑粒子在瞬时圆周运动,由于一个有效的磁场。此外,我们实现了降噪技术和目前的有效性估计的方法。最后,我们进行了严格的比较辐射反应的机制,并发现发射的能量是在很好的协议使用辐射反应计算的损失。

英文摘要:

We model the emission of high energy photons due to relativistic charged particle motion in intense laser-plasma interactions. This is done within a particle-in-cell code, for which high frequency radiation normally cannot be resolved due to finite time steps and grid size. A simple expression for the synchrotron radiation spectra is used together with a Monte-Carlo method for the emittance. We extend previous work by allowing for arbitrary fields, considering the particles to be in instantaneous circular motion due to an effective magnetic field. Furthermore we implement noise reduction techniques and present validity estimates of the method. Finally, we perform a rigorous comparison to the mechanism of radiation reaction, and find the emitted energy to be in excellent agreement with the losses calculated using radiation reaction.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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