Ａｒ‐Ｈｇの放電開始遅れに及ぼすレーザ照射の影響

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タイトル別名
  • Influence of the Laser Irradiation on the Delay Time of Start of Ar-Hg Discharge
  • Ar-Hgの放電開始遅れに及ぼすレーザ照射の影響
  • Ar Hg ノ ホウデン カイシ オクレ ニ オヨボス レーザ ショウシャ ノ エイキョウ

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Since high-pressure mercury lamps have high luminance and emit large luminous flux, they are widely used for outdoor lighting. One of the problems of them is difficulty to re-ignition just after turn off because of high mercury vapor pressure during discharge. One solution is to make photo pre-ionization in the lamp to reduce starting voltage. In this study, ultraviolet laser beam from XeCl excimer laser is introduced to the lamp and the phenomena occurring between laser inlet to starting discharge have been investigated. From the calculation of the time required for ions and electrons to drift between electrodes, it is found that the streamer is formed and it makes an important role to start discharge. Moreover, multi-step discharge was observed and under this condition probability of starting discharge decreased.

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