Modeling in-ice radio propagation with parabolic equation methods
Modeling in-ice radio propagation with parabolic equation methods
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DOI：
10.1103/physrevd.103.103007
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发表时间：
2020-11
影响因子：
5
通讯作者：
S. Prohira;C. Sbrocco;P. Allison;J. Beatty;D. Besson;A. Connolly;P. Dasgupta;C. Deaconu;K. de Vries;S. de Kockere;D. Frikken;C. Hast;E. Santiago;C. Kuo;U. Latif;V. Lukic;T. Meures;K. Mulrey;J. Nam;A. Nozdrina;J. Ralston;R. S. Stanley;J. Torres;S. Toscano;D. J. Van Den Broeck;N. van Eijndhoven;S. Wissel
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文献类型：
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作者：
S. Prohira;C. Sbrocco;P. Allison;J. Beatty;D. Besson;A. Connolly;P. Dasgupta;C. Deaconu;K. de Vries;S. de Kockere;D. Frikken;C. Hast;E. Santiago;C. Kuo;U. Latif;V. Lukic;T. Meures;K. Mulrey;J. Nam;A. Nozdrina;J. Ralston;R. S. Stanley;J. Torres;S. Toscano;D. J. Van Den Broeck;N. van Eijndhoven;S. Wissel
我们研究使用抛物线方程（PE）方法来求解极地冰中的无线电波传播。与时域有限差分 (FDTD) 方法等全场解决方案相比，PE 方法为麦克斯韦方程组提供了近似解，但提供了比简单几何射线追踪 (RT) 方法更完整的传播模型，简单几何射线追踪 (RT) 方法是模拟中微子诱发级联的冰内无线电探测的当前技术水平。 PE 比 FDTD 方法计算效率更高，比 RT 方法更灵活，允许包含衍射效应，并对无法使用几何方法建模的区域中的传播进行建模。我们提出了一种适合冰内情况的新 PE 近似值。我们的结论是，当前的射线追踪方法在处理冰特性方面可能过于简单化，继续使用它们可能会高估冰内中微子探测实验的实验灵敏度。我们讨论了对当前冰内阿斯卡里安型探测器和即将推出的雷达回波望远镜的影响；这些结果与这两个实验系列最相关。我们建议进一步研究冰内无线电应用的 PE 方法。
We investigate the use of parabolic equation (PE) methods for solving radio-wave propagation in polar ice. PE methods provide an approximate solution to Maxwell's equations, in contrast to full-field solutions such as finite-difference-time-domain (FDTD) methods, yet provide a more complete model of propagation than simple geometric ray-tracing (RT) methods that are the current state of the art for simulating in-ice radio detection of neutrino-induced cascades. PE are more computationally efficient than FDTD methods, and more flexible than RT methods, allowing for the inclusion of diffractive effects, and modeling of propagation in regions that cannot be modeled with geometric methods. We present a new PE approximation suited to the in-ice case. We conclude that current ray-tracing methods may be too simplistic in their treatment of ice properties, and their continued use could overestimate experimental sensitivity for in-ice neutrino detection experiments. We discuss the implications for current in-ice Askaryan-type detectors and for the upcoming Radar Echo Telescope; two families of experiments for which these results are most relevant. We suggest that PE methods be investigated further for in-ice radio applications.