Development of an attosecond streak camera and its application to relativistic plasma high harmonics

2016 Fiscal Year Final Research Report

• Project/Area Number: 26286078
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Quantum beam science
• Research Institution: Hiroshima University
• Principal Investigator: Namba Shinichi 広島大学, 工学(系)研究科(研究院), 教授 (00343294)
• Co-Investigator(Kenkyū-buntansha): 岸本 牧 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門・量子ビーム応用研究センター, 研究主幹 (40360432) ; 神門 正城 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門・量子ビーム応用研究センター, 研究主幹 (50343942) ; 長谷川 登 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門・量子ビーム応用研究センター, 研究員 (50360409) ; 錦野 将元 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門・量子ビーム応用研究センター, 研究副主幹 (70370450)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 量子ビーム / Ｘ線レーザー / ポンププローブ分光

Outline of Final Research Achievements

To characterize the temporal evolution of ultrashort X-ray pulses emitted by laser plasmas using a pump-probe method, a magnetic bottle time-of-flight electron spectrometer is constructed. The design is determined by numerical calculations of a mirror magnetic field and of the electron trajectory in a flight tube. The performance of the spectrometer is characterized by measuring the electron spectra of xenon atoms irradiated with a laser-driven plasma X-ray pulse. In addition, two-color above-threshold ionization (ATI) experiment is conducted for measurement of the X-ray laser pulse duration, in which xenon atoms are simultaneously irradiated with an X-ray laser pump and an IR laser probe. The correlation in the intensity of the sideband spectra of the 4d inner-shell photoelectrons and in the time delay of the two laser pulses yields an X-ray pulse width of 5.7 ps, in good agreement with the value obtained using an X-ray streak camera.

Free Research Field

プラズマ物理