STUDIES IN ELECTROMAGNETIC WAVE INTERACTION TECHNIQUES

摘要

The technique of interaction of guided electromagnetic waves in magneto plasmas is utilized to study the phenomena resulting from the cyclotron resonance (f = f = gyrofrequency of electrons) absorption of microwave energy by the electron gas. The enhancement in electronic energy caused by this absorption is experimentally evidenced by the study of (1) gyro-interaction of microwaves of different frequencies (f < f < f_)> (2) emission of microwave noise power at frequencies f > f , (3) intensity of visible light excitation and, (4) rapid disintegration of the plasma. A correlation of these experimental results show that (1) the rate of heating of any specific region of the plasma changes drastically during different time intervals of the pulsed resonant heating microwave signal and (2) non-uniform heating occurs along the plasma axis. Implication of these results on wave propagation in a magnetoplasma will be discussed.