Increase in the efficiency of energy injection into discharge plasma and the luminous efficiency of luminescent lamps during high-frequency pumping

Abstract

It is experimentally justified for the first time that electrodeless induction pump of plasma of standard cylindrical luminescent lamps provides optimization of the high-frequency inductive–capacitive (HFI) discharge conditions. The acceptable frequency range and the effect of the capacitance between the inductor and plasma on the efficiency of resonant energy injection into discharge plasma are revealed. An increase in the luminous efficiency to 25% in the range of pump powers multiple of the lowest nominal power for the lamp under standard operating conditions is detected. Physics of the found phenomenon and the range of application of the power saving technology for electrodeless pumping of luminescent lamps with increased operation life are discussed.