Transport Phenomenon of Mercury in Capillary Discharge Tube

Abstract

A method of determining the mercury transport coefficient in a small diameter discharge tube, used as a backlight lamp, has been developed using increase in light out-put after it is switched on. The diffusion coefficient of mercury in the phosphor-coated tube is about four times that in a clear i.e. non-phosphor-coated tube. The diffusion coefficient reduces as the tube diameter decreases. The absorption coefficient is negative just after the tube is switched on, and after that the value turns to positive.