書誌事項
- タイトル別名
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- Time Resolved Observation of Self-sharpening Phenomenon in Single, High Current Discharge and its Dynamics
- ダイデンリュウ タンパツ ホウデン ニ オケル ビサイジク ケイセイ ゲンショウ ノ ジカン ブンカイ カンサツ ト ソノ ケイセイ ダイナミクス
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Tip of thin tungsten electrode is transformed into a thinner, needle-like shape in single, high current discharge of some tens of amperes and a few hundreds microsecond duration. This self-sharpening phenomenon has been studied by a newly designed, home-made stroboscopic imaging system, which is constructed from a fast CCD camera and a high repetition rate, short pulse laser as an illuminating light source. Using this imaging system, one hundred pictures at 16 or 64 microsecond interval were taken in one discharge event. From these images, we could observe temporal change of the electrode shape during and after the discharge. Special attention was paid on movement of the molten part at the electrode tip. The upper position of the melt part climbs up along the electrode at constant speed after the discharge ended. The move continues for more than one hundred microseconds after the discharge. It is highly probable that the surface tension of the melt is the source of that movement. Based on our observed results, a model of self-sharpening phenomenon has been proposed.
収録刊行物
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- 精密工学会誌
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精密工学会誌 73 (6), 682-687, 2007
公益社団法人 精密工学会
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詳細情報 詳細情報について
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- CRID
- 1390282679774628736
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- NII論文ID
- 110006278978
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- NII書誌ID
- AN1003250X
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- ISSN
- 1882675X
- 09120289
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- NDL書誌ID
- 8855886
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- JaLC
- NDL
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