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首页> 外文期刊>Japanese Journal of Applied Physics. Part 1, Regular Papers, Brief Communications & Review Papers >Study on Temporal and Spatial Distributions of Ba Atoms in Fluorescent Lamp Discharge Using Laser-Induced Florescence
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Study on Temporal and Spatial Distributions of Ba Atoms in Fluorescent Lamp Discharge Using Laser-Induced Florescence

机译：用激光诱导荧光研究荧光灯放电中Ba原子的时空分布

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A laser-induced fluorescence (LIF) technique was applied to the measurements of the temporal and spatial distributions of Ba atoms in the vicinity of the electrode of a fluorescent lamp operated at 60 Hz. Ground-state (6~1 S_0) Ba atoms were excited to a 5~1P_1 level (350.1 nm) by a frequency-doubled dye laser beam, and the subsequent fluorescence (5~1P_1-5~1D_2, 582.6nm) was detected. Over a whole periodic time (16.67 ms), the density of the Ba atoms was found to have two peaks, and the number of Ba atoms emitted in the anode half-cycle was about twofold larger than that emitted in the cathode half-cycle. This difference between the Ba atoms emitted during the anode half-cycle and those emitted during the cathode half-cycle was studied for lamps with different gas pressures. Ba atoms were found to be emitted mainly from the hot spot of the filament electrode. It is suggested that the main factor for Ba atom emission from the electrode is not sputtering by ion bombardment but thermal evaporation.
机译：将激光诱导荧光（LIF）技术应用于在60 Hz下工作的荧光灯电极附近的Ba原子的时空分布测量。通过倍频染料激光束将基态（6〜1 S_0）Ba原子激发到5〜1P_1能级（350.1 nm），并检测到随后的荧光（5〜1P_1-5〜1D_2，582.6nm） 。在整个周期时间内（16.67毫秒），发现Ba原子的密度有两个峰值，并且阳极半周期发射的Ba原子数量大约是阴极半周期发射的Ba原子数量的两倍。对于具有不同气压的灯，研究了在阳极半周期内发射的Ba原子与阴极半周期内发射的Ba原子之间的差异。发现Ba原子主要从灯丝电极的热点发射。建议从电极发射Ba原子的主要因素不是通过离子轰击进行溅射而是热蒸发。

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