Lower hybrid resonant layer excitation and mode conversion in the linear LISA machine

Abstract

The radio frequency absorption near the lower hybrid resonance of an inhomogeneous plasma has been studied using Langmuir and magnetic probes and also a Faraday cup. The plasma was confined in the mirror linear device LISA, excited by a 28 MHz RF source. It has been shown that the absorption rate and the resonance region in space depends on the resonant volume created by the external magnetic field. Due to the collisional damping, the quality factor of the machine is comparable to a low-Q cavity resonator.

Particle simulations on propagation and resonance of lower hybrid wave launched by phased array antenna in linear devices

“…Within the broad range of available wave frequencies, waves in the lower hybrid range of frequency, i.e. lower hybrid waves (LHWs), have extensive applications in many devices [4][5][6][7][8]. They involve helicon wave, lower hybrid fast and slow wave, applied for the current drive, plasma heating and plasma rotation in toroidal devices [9][10][11].…”