小型球形脉冲氙灯光谱分析与实验测定

摘要

Xenon flash lamp is used by most analytical instruments and medical equipments as light sources whose spectral char-acteristics exert a tremendous influence on the property of instruments and medical equipments.In order to study the effects of pulsed Xenon discharge circuit parameters and geometric parameters on the spectral characteristics,theoretical analysis has been conducted to Xenon lamp emitting process with the gas discharge theory.The spectroscopic detection system has been designed to conduct experimental detection to the spectral characteristics of pulsed Xenon lamp with different parameters.The experimen-tal results show that the emission spectra of Xenon flash lamp contain both line and continuous radiation.The line spectrum re-sults from the electron energy gap transition,while the cw radiation related to ionic recombination and bremsstrahlung.The rela-tive spectral intensity increases linearly with the discharge voltage,and has a positive correlation with storage capacitor.When low discharge voltage,the shorter the arc length,the higher the relative spectral intensity .while the discharge voltage becomes higher,the result is reversed.The work in this paper has great significance for xenon flashlamp on the parameters selection and industrial application.%作为分析仪器和医疗仪器光源，脉冲氙灯的光谱特性直接影响着仪器的整体性能。为了研究脉冲氙灯放电回路参数及几何参数对其光谱特性的影响，利用气体放电理论分析了脉冲氙灯发光过程，设计了光谱检测系统，实验测定了脉冲氙灯在不同放电参数下的光谱特性。结果表明：脉冲氙灯光谱由连续谱和线状谱组成，连续谱有离子复合和韧致辐射产生，线状谱由电子能级跃迁产生。相对光谱辐射能量随着放电电压升高呈近似线性增长、并随着储能电容的变大而变大。在放电电压较低时，弧长较短时相对光谱辐射能量较大；在放电电压较大时，弧长越长相对光谱辐射能量越大。对于脉冲氙灯工作参数选取以及应用生产具有重要的意义。