As gaseous propellant is injected into the tube, the helicon antenna bombards it with high-powered radio waves.
Extensive modeling has been carried out of both the plasma conditions and t he helicon behavior.
British Dictionary definitions for helicon
a bass tuba made to coil over the shoulder of a band musician
C19: probably from Helicon, associated with Greek helix spiral
a mountain in Greece, in Boeotia: location of the springs of Hippocrene and Aganippe, believed by the Ancient Greeks to be the source of poetic inspiration and the home of the Muses. Height: 1749 m (5738 ft) Modern Greek name Elikón
1520s, from Greek Helikon, mountain in Boeotia, sacred to the Muses, in which arose the fountains of Aganippe and Hippocrene. Literally "the tortuous mountain," from helix (genitive helikos) "spiral" (see helix).