Abstract
Using a 135-kHz induction-coil-type electrodeless lamp system offers several advantages including high efficiency, long life, and low resource consumption. To optimize the lamp dimensions, electron density was analyzed by the complex finite element method for magnetic fields and plasma. Magnetic flux density, current density, and electric field distribution were derived from magnetic analysis. The electron temperature and ionizing frequency were then calculated on the basis of the electric field. The distributions of electron density were subsequently deduced by solving diffusion equations. The maximum value of electron density for a 150-W bulbous electrodeless lamp was 1.5×1018m-3 near the induction coil. The analyzed distributions are in agreement with the experimental ones.
