空心阴极灯在强短脉冲供电时元素离子线的时间分辨光谱

Time-resolved Emission Profile of Ionic Line From a Hollow Cathode Lamp Pulsed With Microsecond Duration and High Current

本文报道了普通空心阴极灯在强短脉冲供电时离子线发射的时间分辨光谱。实验表明,在微秒级脉宽、数十安培电流的脉冲作用下,阴极的发射能量由直流供电时集中在原子共振级的状态转变到集中在离子共振级的状态。以钙灯为例,其离子线的发射强度约增加了10~5倍。

The time-resolved emission profile of the calcium ionic line from a hollow cathode lamp(HCL) pulsed with 1～4μs duration and 10～30A peak current is described in the present work. The exper mental results indicate that under the operating conditions selected the major emission energy is transferred to the excitation of ionic levels instead of atomic levels as normally observed in a DC-HCL or a conventional pulsed HCL. With the pulse-daration of 1.5μs and peak-current of 28A, the Hne intensi(y of Ca Ⅱ 393.3nm is more than 5 orders of magnitude enhanced. Under the peak-current studied(<30A), no observable self-absorption is noted.