U.S. Naval Research Laboratory research physicists and engineers from the Plasma Physics Division, working at the High-frequency Active Auroral Research Program (HAARP) transmitter facility, Gakona, Alaska, successfully produced a sustained high density plasma cloud in Earth’s upper atmosphere.
“Previous artificial plasma density clouds have lifetimes of only ten minutes or less,” said Paul Bernhardt, Ph.D., NRL Space Use and Plasma Section. “This higher density plasma ‘ball’ was sustained over one hour by the HAARP transmissions and was extinguished only after termination of the HAARP radio beam.”
Sequence of images of the glow plasma discharge produced with transmissions at the third electron gyro harmonic using the HAARP HF transmitter, Gakona, Alaska. The third harmonic artificial glow plasma clouds were obtained with HAARP using transmissions at 4.34 megahertz (MHz). The resonant frequency yielded green line (557.7 nanometer emission) with HF on November 12, 2012, between the times of 02:26:15 to 02:26:45 GMT.
The NRL group succeeded in producing artificial plasma clouds with densities exceeding 9 x 105 electrons cm3 using HAARP transmission at the sixth harmonic of the electron cyclotron frequency.
Optical images of the artificial plasma balls show that they are turbulent with dynamically changing density structures. Electrostatic waves generated by the HAARP radio transmissions are thought to be responsible for accelerating electrons to high enough energy to produce the glow discharge in the neutral atmosphere approaching altitudes of nearly 170 kilometers.
The artificial plasma clouds are detected with HF radio soundings and backscatter, ultrahigh frequency (UHF) radar backscatter, and optical imaging systems. Ground measurements of stimulated electromagnetic emissions provide evidence of the strength and frequency for the electrostatic waves that accelerated ambient electrons to ionizing velocities.
Naval Research Laboratory