Abstract
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 (61S0) Ba atoms were excited to a 51P 1 level (350.1 nm) by a frequency-doubled dye laser beam, and the subsequent fluorescence (51P1-51D2, 582.6 nm) 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.
| Original language | English |
|---|---|
| Pages (from-to) | 8109-8112 |
| Number of pages | 4 |
| Journal | Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers |
| Volume | 45 |
| Issue number | 10 B |
| DOIs | |
| Publication status | Published - Oct 21 2006 |
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All Science Journal Classification (ASJC) codes
- Engineering(all)
- Physics and Astronomy(all)
Cite this
Study on temporal and spatial distributions of Ba atoms in fluorescent lamp discharge using laser-induced florescence. / AlyHendy, Ahmed Samir; Yamashita, Go; Yamagata, Yukihiko; Uchino, Kiichiro; Ueda, Takashi; Manabe, Yoshio.
In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 45, No. 10 B, 21.10.2006, p. 8109-8112.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Study on temporal and spatial distributions of Ba atoms in fluorescent lamp discharge using laser-induced florescence
AU - AlyHendy, Ahmed Samir
AU - Yamashita, Go
AU - Yamagata, Yukihiko
AU - Uchino, Kiichiro
AU - Ueda, Takashi
AU - Manabe, Yoshio
PY - 2006/10/21
Y1 - 2006/10/21
N2 - 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 (61S0) Ba atoms were excited to a 51P 1 level (350.1 nm) by a frequency-doubled dye laser beam, and the subsequent fluorescence (51P1-51D2, 582.6 nm) 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.
AB - 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 (61S0) Ba atoms were excited to a 51P 1 level (350.1 nm) by a frequency-doubled dye laser beam, and the subsequent fluorescence (51P1-51D2, 582.6 nm) 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.
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U2 - 10.1143/JJAP.45.8109
DO - 10.1143/JJAP.45.8109
M3 - Article
AN - SCOPUS:34547857063
VL - 45
SP - 8109
EP - 8112
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 10 B
ER -