摘要
脉冲氙灯是一种新型光源,利用量子理论以及气体放电理论分析了脉冲氙灯放电过程,设计了放电测试系统,实验测定了放电过程中的电压、电流和光脉冲信号。结果表明:在预电离阶段自由电子浓度较低,能量较低;气体放电阶段灯内形成电子崩,使得自由电子浓度的增大,放电电流迅速上升,电压下降;离子复合时释放出光子形成光脉冲,氙灯脉冲的光能量输出和光谱特性与复合电子能量、氙气复合能级相关,而当输入能量与氙灯的能耗不一致的时候,将导致充电电容反复充放电,而使电路产生振荡。对于分析脉冲氙灯放电过程,优化放电回路参数设计和脉冲氙灯的生产具有重要意义。
The Xenon flash lamp is a new type of light source for analytical instrument .The present paper analyzed the discharge process of xenon flash lamp ,presented the discharge test system ,and conducted experimental measurement of the voltage ,current and optical pulse signal in the process of discharge .The results show that in the preliminary discharge ,the free electron concentration was at a low level ,so the energy was at a low level ,then following the gas discharge ,numerous free electrons formed in the lamp ,resultin in the increase in the concentration of free electrons ,therefore discharge current rised rapidly and voltage reduced .The lamp released photons to generate light pulse in the moment of ionic recombination ,The pulse xenon lamp light energy output and spectral characteristic is related to electron energy in recombination and combination level of xenon ,if the input energy and the energy consumption of the xenon lamp is inconsistent ,it will lead to repeated capacitor charging and discharging and produce oscillation waveform .This paper is very useful for understanding the process of xenon lamp discharge ,optimizing the driver circuit and the production of xenon flash lamp .
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2014年第7期1978-1982,共5页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(11074134)
国家重大科学仪器项目(2011YQ15004008)
天津市科技支撑计划项目(10ZCKFSH02200)资助
关键词
光源
脉冲氙灯
放电过程
量子理论
实验测定
Light source
Xeon flash lamp
Discharge process
Quantum theory
Experimental determination
