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Ultrafast observation of compression state with femtosecond laser driven shock wave
https://repo.qst.go.jp/records/2002053
https://repo.qst.go.jp/records/20020536d607e09-bb0f-496a-b234-c82b8c718cce
| アイテムタイプ | 会議発表用資料 / Presentation(1) | |||||||
|---|---|---|---|---|---|---|---|---|
| 公開日 | 2025-06-24 | |||||||
| タイトル | ||||||||
| タイトル | Ultrafast observation of compression state with femtosecond laser driven shock wave | |||||||
| 言語 | ja | |||||||
| 言語 | ||||||||
| 言語 | jpn | |||||||
| 資源タイプ | ||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||||
| 資源タイプ | conference presentation | |||||||
| 著者 |
中新 信彦
× 中新 信彦
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| 抄録 | ||||||||
| 内容記述 | High pressure induced by femtosecond laser-driven shock waves (fs shock) in air can improve material properties by inducing hardening and compressive residual stress. To clarify the mechanisms behind unique phenomena caused by the fs shock, we have developed a time-resolved velocity measurement system based on a frequency domain interferometry (FDI). We observed shock waves in aluminum after direct irradiation of a fs laser pulse with an intensity of 10^14 W/cm^2 onto the metal surface in air. The time gap between the probe pulses of ~ 1 ps enables us to observe the ultrafast dynamics of the shockwave, including accurate evaluation of the arrival time and the ultrafast rising time of the shockwave less than 10 ps. The thermodynamic state of the fs shock can be evaluated by measuring the shock velocity and particle velocity obtained from the rear surface motion as the shock wave breaks through. We will provide details of the FDI system for femtosecond laser-driven shock wave and discuss the measurement results for further understanding the shock wave formation process induced by femtosecond laser pulse irradiation. | |||||||
| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||||
| 内容記述 | First WorkShop French Japan on Material on Very High Strain Rate and Pressure produced by Plasma Laser | |||||||
| 発表年月日 | ||||||||
| 日付 | 2025-06-18 | |||||||
