WebHelicon waves have been recently proposed as an off-axis current drive actuator due to their expected high current drive efficiency in the mid-radius region in high beta tokamaks. This current drive efficiency has mostly been calculated ignoring the effects of the plasma in the scrape-off-layer (SOL) in the modeling. The net core current drive efficiency will … http://www.seas.ucla.edu/~ffchen/Publs/Chen181.pdf

Helicon waves and efficient plasma production - AIP Publishing

WebThree distinct modes of operation of the helicon plasma source, capacitive, inductive, and helicon-wave, are identified by the structure of the plasma-wave-fields. Results are reported for a double-half-turn antenna, which is believed to be the first reporting for such an antenna structure in application to helicon-wave plasma sources. WebHowever, skin depth depends on an inverse proportionality to the square root of angular frequency. Thus a low frequency electromagnetic wave may be able to overcome the skin depth problem, and thereby propagate throughout the material. A helicon discharge is an excitation of plasma by helicon waves induced through radio frequency heating. lightning to optical audio

Helicon high-density plasma sources: physics and applications

WebPlasma ionization by helicon waves. Francis F. Chen. Physics. 1991. The dispersion relation for helicon waves in a uniform, bounded plasma is derived with both collisional and Landau damping. It is shown that the latter can explain … Web22 jul. 2014 · We show that helicon plasma can also occur without the distinct core. In these conditions, the plasma is dominated by low … Web17 feb. 2024 · Helicon waves are a category of right-hand polarized (RHP) plasma waves which propagate along DC magnetic fields in bounded systems. They are related to so-called whistler waves, which have been studied in atmospheric physics since the early twentieth century. peanut house turkey tx