Mechanism of Pfoduction of a Filamentary Plasma Created by A short PulseLaser.

短脉冲激光产生丝状等离子体的产生机制。

• 批准号: 12650282
• 负责人: UCHIUMI Michihiro
• 金额: $ 2.3万
• 依托单位: Ariake National College of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650282/
• 关键词: Filamentary plasma; serosol; particle counter; laser-induced lightning; air-breakdown; inverse bremsstrahlung; carbon dioxide laser; discharge induction

In order to induce a lightning to the tip of a tower, a long ionized channel has been studied. A high-power C02 Iaser can create a long chain of discrete plasma beads but has a problem in inducing a disoharge because its conductance is not homogenous. The short pulse laser can produce a long ionized continuous channel, i, e. filamentary plasma. The theoretical model has developed to explain the mechanism of the production of the filamentary plasma.The optical air-breakdown mechanism was treated by enrpirical relations instead of taking inverse bremsstrahlung into cosiderations. A simple equation was newly proposed here to describe processes of growing of plasma beads. The simulation results on the density plasma beads wre qualitatively in agreement with experimental results. The model consisting of these procedures has a possibility of predict the density of plasma beads whioh are produoed in the atmosphere by a C02 Iaser owing to ignition of atmospheric aerosols.

为了在塔的顶端诱导闪电，研究了一个长电离通道。一个高功率的二氧化碳激光器可以产生一个长链的离散等离子体珠，但有一个问题，在诱导放电，因为它的电导是不均匀的。短脉冲激光可以产生长离子化的连续通道，即丝状等离子体。这个理论模型已经发展到可以解释丝状等离子体产生的机制。光学空气击穿机理用经验关系来处理，而不考虑逆韧致。本文提出了一个描述等离子体微珠生长过程的简单方程。密度等离子体微珠的模拟结果与实验结果定性一致。由这些步骤组成的模型有可能预测大气中co2激光由于大气气溶胶的点火而产生的等离子体珠的密度。

项目成果

谷口真一郎, 辻利則, 大坪昌久, 本田親久, 内海通弘, 植田清隆: "直流電界計測用光応用電界センサを用いた放電空間中の電界計測"宮崎大学工学部紀要. 29. 179-185 (2000)

Shinichiro Taniguchi、Toshinori Tsuji、Masahisa Otsubo、Chikahisa Honda、Michihiro Utsumi、Kiyotaka Ueda：“使用用于测量直流电场的光电场传感器测量放电空间中的电场”宫崎大学工学部公告29。 179-185 (2000)

S. Taniguchi, T. Tsuji, M. Otsubo, C. Honda, M. UCHIUMI and K. Ueda: "Measurements of DC Electric Field in a Discharge Gap Using an Optical Electric Field Sensor"Memoirs of the Faculty of Engineering, Miyazaki University. 29. 179-185 (2000)

S. Taniguchi、T. Tsuji、M. Otsubo、C. Honda、M. UCHIUMI 和 K. Ueda：“使用光电电场传感器测量放电间隙中的直流电场”宫崎大学工学部回忆录

M.Uchiumi, H.Hayashi, K.Ueda, K.Muraoka, Tanaka, Honda, Kinoshit: "Formation of Negative Impulse Discharge Induced by an XeCl Excimer Laser in a Long Rod-to-rod Electrode Gap in Air"Electrical Engineering in Japan. 134・2. 11-18 (2000)

M.Uchiumi、H.Hayashi、K.Ueda、K.Muraoka、Tanaka、Honda、Kinoshit：“空气中长棒对棒电极间隙中 XeCl 准分子激光器诱导的负脉冲放电的形成”电气工程日本。11-18（2000）

M.Uchiumi, Honda, Kinoshita: "Observations on a Laser-induced Plasma in inducing an Impulse Discharge"Proceedings of 2001 Japan-Korea Joint Symposium on Electrical Discharge and High Voltage Engineering. 249-252 (2001)

M.Uchiumi、Honda、Kinoshita：“Observations on a Laser-induced Plasma in inducing an Impulse Discharge”2001 年日韩放电和高电压工程联合研讨会论文集。

M.Uchiumi, K.Ueda, K. Muraoka, Tanaka, . Honda, . Kinoshita Akazaki: "An Impulse Discharge Induced by a Laser Induced Plasma Bead"Proceedings of the 10th Asian Conference on Electrical Discharge. 91-94 (2000)

M.Uchiumi，K.Ueda，K.Muraoka，Tanaka，。