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arXiv 2305.09522physics.acc-phphysics.comp-ph
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取向晶体中沟道和辐射过程的全原子相对论分子动力学模拟

All-atom relativistic molecular dynamics simulations of channeling and radiation processes in oriented crystals

Andrei V. Korol, Gennady B. Sushko, Andrey V. Solov'yov

AI总结:

本文综述了全原子相对论分子动力学方法在取向晶体中沟道和辐射模拟的应用,该方法超越连续势和二元碰撞框架,通过MBN Explorer实现,并与实验数据对比验证,为新型伽马射线光源设计提供支持。

摘要:

我们回顾了近年来在超相对论弹道粒子在取向晶体中传播、辐射发射及相关现象的数值模拟领域取得的成就。这一主题与基于将取向晶体暴露于超相对论带电粒子束来设计新型伽马射线光源的问题高度相关。本文重点介绍了超越连续势和二元碰撞框架的高级计算探索方法。详细描述了在MBN Explorer软件包中实现的多尺度全原子相对论分子动力学方法。我们展示了几个与超相对论弹道粒子(电子、正电子和π介子)在取向直晶体、弯曲晶体和周期弯曲晶体中的沟道和光子发射建模相关的案例研究。在大多数情况下,模拟中使用的输入数据,如晶体取向和厚度、弯曲半径、周期和振幅,以及弹道粒子的能量,均选择与已完成和正在进行的实验所用参数相匹配。在可用的情况下,计算结果与实验数据和/或其他数值方法获得的数据进行了比较。

英文摘要:

We review achievements made in recent years in the field of numerical modeling of ultra-relativistic projectiles propagation in oriented crystals, radiation emission and related phenomena. This topic is highly relevant to the problem of designing novel gamma-ray light sources based on the exposure of oriented crystals to the beams of ultra-relativistic charged particles. The paper focuses on the approaches that allow for advanced computation exploration beyond the continuous potential and the binary collisions frameworks. A comprehensive description of the multiscale all-atom relativistic molecular dynamics approach implemented in the MBN Explorer package is given. Several case studies related to modeling of ultra-relativistic projectiles (electrons, positron and pions) channeling and photon emission in oriented straight, bent and periodically bent crystals are presented. In most cases, the input data used in the simulations, such as crystal orientation and thickness, the bending radii, periods and amplitudes, as well as the energies of the projectiles, have been chosen to match the parameters used in the accomplished and the ongoing experiments. Wherever available the results of calculations are compared with the experimental data and/or the data obtained by other numerical means.

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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