| TEA CO2激光器不同放电电路放电过程的比较 |
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| 引用本文： | 陈钰琦,左都罗,程祖海,李啸.TEA CO2激光器不同放电电路放电过程的比较[J].强激光与粒子束,2008,20(5):729-733. |
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| 作者姓名： | 陈钰琦 左都罗 程祖海 李啸 |
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| 作者单位： | 1. 华中科技大学 武汉光电国家实验室筹激光科学与技术研究部， 武汉 430074；2. 华中科技大学 光电子科学与工程学院, 武汉 430074 |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | 利用像增强CCD相机对脉冲CO2激光器的放电区进行观测，获得了放电辉光的发展过程，由此研究了长脉冲放电电路和短脉冲放电电路对放电过程的影响。发现普通电容放电电路（长脉冲放电电路）存在与自持放电阶段相对应的二次辉光；采用磁压缩开关的短脉冲放电电路，预电离出现较晚，但预电离辉光峰值和主放电辉光峰值之间间距较短，不存在自持放电阶段，只观测到一次强辉光。长脉冲放电电路与短脉冲放电电路在放电的后期均存在一个阴极位降区形成的过程。短脉冲放电电路有利于产生更窄的脉宽和更高的峰值功率。
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| 关 键 词： | TEA CO2激光器 脉冲放电 电容放电开关 磁压缩开关 阴极位降区 |
| 收稿时间： | 1900-01-01; |
Comparison of discharge between different circuits of TEA CO2 laser |
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| CHEN Yu-qi,ZUO Du-luo,CHENG Zu-hai,LI Xiao.Comparison of discharge between different circuits of TEA CO2 laser[J].High Power Laser and Particle Beams,2008,20(5):729-733. |
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| Authors: | CHEN Yu-qi ZUO Du-luo CHENG Zu-hai LI Xiao |
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| Institution: | 1. Wuhan National Laboratory for Optoelectronics，Huazhong University of Science and Technology, Wuhan 430074, China; 2. Institute of Optoelectronics Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China |
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| Abstract: | Time-resolved photos of the discharge of TEA(transversely excited atmospheric pressure) CO2 laser taken by ICCD camera were analyzed. Quantitative data on the spatial distribution and the temporal development of the discharge were given. Second glow originated from the self sustained discharge was found in the case of usual capacitor discharge circuit (long pulse discharge circuit). The light emission of the preionization with a short pulse discharge circuit using a magnetic compress switch formed later, but the interval between preionization and main discharge was shorter. For both long pulse discharge circuit and short pulse discharge circuit, the formation of cathode sheath occurred in the late stage of discharge. Short pulse discharge circuit has advantages to obtain shorter pulse dur |
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| Keywords: | Pulse discharge Capacitor discharge circuit Magnetic compress switch Cathode sheath |
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