氣體溫度對密閉式二氧化碳雷射操作之影響模擬分析

Abstract

Simulation is the topic of this thesis. By making a model of the sealed offCO2 laser ,we want to understand how the temperature of gas in different gascomposition and discharge condition would affect the laser output power. Procedure to follow is by getting the flux of E/p value in different pressureof various composition in different radius of tube. Putting the result into the " six Ts " physical model of the sealed off CO2 laser, we could get the relationship between laser output power and discharge current and then ,put them into comparison. By this program ,we found the result simulation is much more similar tothe result of experiment in the bigger radius tube.It may be caused by the E/pvalue measured from outside of the discharge tube change mush more unusualin the smaller radius tube. As far as temperature is concerned, we can get the temperature of different type gas composition in discharge. When N2 is added more ,the temperature arise more moderate at some region of discharge currnet.This may be the reason why N2 is added more performe well too at high wall temperature. 本論文主要是模擬分析密閉式二氧化碳雷射的物理特性.希望藉由此 分析能夠了解溫度對雷射輸出工率的影響 . 藉由程式,我們得到大管 徑的模擬結果與實驗結果較接近,這可能是小管徑管內E/p的便化與放電管 外部量得到的值差異較大的緣故 而含氮較多的氣體組成其平均氣體 溫度較高,在某段工作電流下氣溫變化不大,這也可能是其她文獻實驗得 到,含氮量較高的組成可以適應較高管璧溫度的原因.