| Budget Amount *help |
¥19,110,000 (Direct Cost: ¥14,700,000、Indirect Cost: ¥4,410,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2011: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2010: ¥12,220,000 (Direct Cost: ¥9,400,000、Indirect Cost: ¥2,820,000)
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| Research Abstract |
We have developed a new, high-speed video system with high time-resolution for visualizing multiple-pulse irradiation effects in ultra-fast pulse laser processing. The technique, named as high-speed laser stroboscopic videography technique, has successfully applied to observe the laser-induced phenomena during a groove and a hole drilling by a femtosecond laser on cemented tungsten carbide samples. Effects of laser pulse energy and scan speed on developments of machined futures and deposition of debris were analysed. Observed results indicate that these effects were rather complicated and demand further systematic researchs.
The developed tehcnique has been successfully applied in dynamical studies on laser ablation in liquids. Effects of laser-induced cavitation bubbles on laser shock processes have been analysed. Nano-particle generation by laser ablation in liquids have been studied through the technique.
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