短弧脉冲氙灯瞬间发射光脉冲能量测量

Measurement of the radiative pulse energy from short-arc xenon flash lamps

短弧脉冲氙灯体积小,能在μs时间内发出高能量的闪烁光脉冲,具有优良的紫外发射光谱,是一种理想的分析仪器光源。由于脉冲发光是介于两个相近的阴极和阳极之间,其发光时间小于10μs,发光点小,接近理想点光源,因此跟踪测定瞬间发出的光脉冲光谱,特别是测定单个脉冲的发光能量,不仅可以用于分析光源本身的光电转化效率,还可以用于分析闪烁发光的稳定性。本文分析了短弧脉冲氙灯闪光的工作原理及其发光能量与输入能量之间的相关关系;采用热释电能量检测探头,建立了光脉冲能量测定系统,实验测定了闪烁脉冲的稳定性。实验结果表明:当输入电压为900V时,单个光脉冲的能量为162μJ,不稳定性为小于2%。

The xenon flash lamp produces transient high-power white light, as well as provides a high-in- tensity UV emission spectrum,with outstanding features such as small size. Measuring the instantaneous light pulse emission spectrum, especially the single pulse emission energy, not only can be used to analyze the energy conversion efficiency of the light source, but also can be used to investigate the stability of the flash lamp. This paper analyzes the working principle of a short-arc pulse lamp and the relationship be- tween the radiation energy and the input energy. The method of pyroelectric energy detection probe is used to establish the light pulse energy measurement system. The experimental results show that when the main input voltage is 900 V,the single light pulse energy is 162 μJ and the stability is less than 2%.