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The High-frequency Active Auroral Research Program (HAARP) is a University of Alaska Fairbanks program which researches the ionosphere – the highest, ionized part of Earth's atmosphere. Work on the HAARP facility began in 1993. The most prominent instrument at HAARP is the Ionospheric Research Instrument (IRI), a high-power radio frequency ...
Tokamak. The reaction chamber of the DIII-D, an experimental tokamak fusion reactor operated by General Atomics in San Diego, which has been used in research since it was completed in the late 1980s. The characteristic torus-shaped chamber is clad with graphite to help withstand the extreme heat. A tokamak (/ ˈtoʊkəmæk /; Russian ...
Dielectric heating, also known as electronic heating, radio frequency heating, and high-frequency heating, is the process in which a radio frequency (RF) alternating electric field, or radio wave or microwave electromagnetic radiation heats a dielectric material. At higher frequencies, this heating is caused by molecular dipole rotation within ...
These transmitters operate in the high frequency (HF) range (3-30 MHz) at which radio waves are reflected from the ionosphere back to the ground. With such facilities a range of plasma turbulence phenomena can be excited in a semi-controlled fashion from the ground, during conditions when the ionosphere is naturally quiet and not perturbed by ...
Helicon (physics) In electromagnetism, a helicon is a low-frequency electromagnetic wave that can exist in bounded plasmas in the presence of a magnetic field. The first helicons observed were atmospheric whistlers, [1][2] but they also exist in solid conductors [3][4] or any other electromagnetic plasma. The electric field in the waves is ...
The first plasma operations with liquid lithium were performed in March 2021. This was done via a tungsten substrate mounted on HIDRA-MAT and a drop of lithium, m Li = 100 mg, places on it surface. This was inserted into a 600 s, 5.4 kW plasma and exposed at the scrape off layer edge in a = 1/4 plasma, near an island. Initial PMI was observed ...