Study of improvement in lamp efficiency of a spherical electrodeless lamp

摘要

We advanced our simulation method for inductively-coupled plasma in a spherical electrodeless lamp and investigated improvement in lamp efficiency of the lamp. Resultantly, we found that the change of the lamp efficiency could be explained by focusing on the consumed power of plasma and the location of electrons with high energy. We also investigated the suitable lamp design to improve in the lamp efficiency. The possibility of improvement in the efficiency of 5.4 lm/W was obtained by the optimization of the dimensions of the power coupler.