Studies of Nonlinear Ionospheric Plasma Effect at Arecibo

阿雷西博非线性电离层等离子体效应研究

• 批准号: 8716718
• 负责人: William Gordon
• 金额: --
• 依托单位: William Marsh Rice University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-12-01 至 1991-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8716718&HistoricalAwards=false
• 关键词: Studies; Nonlinear; Ionospheric; Plasma; Effect

The Ionosphere is the conducting region of the upper atmosphere produced by absorbtion of solar ultraviolet light. It interacts strongly with radio waves and reflects, refracts and absorbs them depending on the frequency. When irradiated with sufficiently powerful radio waves of appropriate frequency it will absorb sufficient power to become heated, form localised plasma density enhancements, emit energetic electrons, and emit light. The approach being explored under this award involves irradiation by two radio beams with closely spaced frequencies, which are expected to produce ionospheric oscillations at the beat frequency, and thus act as a radio transmitter for very low frequencies without the need for a huge antenna on the surface. This work provides insights into the fundamental physics of ionized media, and may have practical applications for communication.

电离层是高层大气吸收太阳紫外线而产生的传导区域。它与无线电波发生强烈相互作用，并根据频率反射、折射和吸收无线电波。当受到适当频率的足够强大的无线电波照射时，它将吸收足够的能量来加热，形成局部等离子体密度增强，发射高能电子并发光。 该奖项正在探索的方法涉及通过两个频率间隔很近的无线电波束进行照射，预计它们会产生拍频的电离层振荡，从而充当极低频率的无线电发射器，而不需要在表面安装巨大的天线。 这项工作提供了对电离介质基础物理的见解，并可能在通信方面有实际应用。