Comparative Incoherent Scatter Radar Observations of Strong Langmuir Turbulence at Arecibo, Puerto Rico and Tromso, Norway

PI将在高分辨率阿雷西博和EISCAT增强等离子体线谱上测量高频诱导的电离层朗缪尔湍流，希望在白天的实验中定位相对于匹配和反射高度的级联光谱。他将在增加高频功率的情况下进行低高频占空比实验，以研究增加功率对自由模物理的影响，以及观察磁场几何对正常高频诱导等离子体线和高频增强型外移等离子体线的影响的实验。此外，他还将在低高频占空比加热过程中进行夜间观测，使用“chirp”技术更好地将白天的结果与夜间编码的长脉冲实验进行比较。最后，在时间允许的情况下，他将改变高频占空比，以测量阿雷西博和EISCAT的高频不规则性导致的自然等离子体线加宽。

The PI will measure HF induced ionospheric Langmuir turbulence at high resolution Arecibo and EISCAT enhanced plasma line spectra, hoping to locate the cascade spectrum relative to matching and reflection heights during daytime experiments. He will perform low HF duty cycle experiments with increased HF power to investigate the effects of increased power on the free mode physics, as well as experiments observing the effect of magnetic field geometry on observations of the normal HF-induced plasma line, and on HF enhanced outshifted plasma line. Moreover, he will perform nighttime observations during low HF duty cycle heating using the 'chirp' technique to better compare daytime results with nighttime coded long pulse experiments. Finally, time permitting, he will vary the HF duty cycle to measure HF irregularity-induced broadening of the natural plasma line at Arecibo and EISCAT.