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首页> 外文期刊>Plasma physics and controlled fusion >Auroral lights created by high-power radiowaves in the ionospheric E region
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Auroral lights created by high-power radiowaves in the ionospheric E region

机译：电离层E区高功率无线电波产生的极光

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摘要

Artificial auroral lights are optical emissions induced by high-power radiowaves in a manner similar to the creation of natural auroral lights due to precipitation of superthermal electrons. Here the Earth's atmosphere itself plays the role of a plasma laboratory. A high-power radio-transmitter creates superthermal electrons in situ due to radiowave interactions with the ionospheric plasma. Low-altitude (85-125 km) artificial aurora is a relatively rare phenomenon observed for the first time about 10 years ago. Analysis of available observations shows that its intensity and structure, as well as the very possibility of its generation at these altitudes, depend largely on the presence and features of so-called sporadic ionization, best known for its effect on navigation and communication. Thus, all other parameters unchanged, a 20 times increase in the height-extent of sporadic ionization clouds could under certain circumstances result in a 27-fold increase in the intensity of the low-altitude artificial aurora. Understanding the morphology and typical features of sporadic ionization clouds for a given location would allow proper planning of experimental campaigns and noticeably extend our knowledge of the atmosphere and its use for human needs. Equally important is that low-altitude artificial auroras give information about the horizontal structure and dynamics of E-region sporadic ionization, the airglow-source region, the energy of superthermal electrons and perhaps the local atmospheric temperature and water vapor content at 80-90 km.
机译：人造极光是由高功率无线电波感应的光发射，其方式类似于由于过热电子的沉淀而产生天然极光。在这里，地球大气本身起着等离子体实验室的作用。大功率无线电发射器由于无线电波与电离层等离子体的相互作用而在原位产生超热电子。低空（85-125公里）人造极光是大约10年前首次观察到的相对罕见的现象。对现有观测资料的分析表明，它的强度和结构，以及在这些高度上生成它的可能性，在很大程度上取决于所谓的零星电离的存在和特征，以对导航和通信的影响而闻名。因此，在所有其他参数不变的情况下，偶发电离云的高度范围增加20倍，在某些情况下可能导致低空人造极光的强度增加27倍。了解给定位置的零星电离云的形态和典型特征，可以合理地计划实验活动，并显着扩展我们对大气及其对人类需求的了解。同样重要的是，低空人造极光提供有关E区零散电离的水平结构和动力学，气辉源区，过热电子的能量以及也许在80-90 km处的局部大气温度和水蒸气含量的信息。

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