T8荧光灯中的条纹放电研究

Ｔ８荧光灯是一种高效节能照明光源,但在不环境温过低,放电电流太小时,它常常条纹电,对照明造很成大干扰。研究条纹放电的成因和特性是解决这一问题的先决条件。首先从放电等离子体的基本方程出发,求得非均匀等离子体正柱中的色散关系;由此通过计算得到条纹放电形成条件,条纹放电的频率、相速度和时间增长率等主要参数。

Studies on the Striations in T8 Fluorescent Lamps

T8 fluorescent lamp is one of the high-efficient energy-saving illuminating light sources. But at relatively low ambient temperature and small discharge current,there often appeared striations in the lamps,which seriously disturbed the illuminating. It is the precondition of solving problem to understand the cause of the stri ations and its characteristics. From basic discharge plasma equations,a dispersion equation of non-uniform plasma column is derived, from which the criteria for the appearance of the striations and the striation parameters, including frequency, phase velocity and time increment rate are obtained. Experimentally study of T8 lamps show that the measured striation parameters are in reasonable agreement with theoretical calculation.