Demonstration of ultrafast electron diffraction with fast electron pulses in plasma generated by intense femtosecond laser

2015 Fiscal Year Final Research Report

• Project/Area Number: 23226002
• Research Category: Grant-in-Aid for Scientific Research (S)
• Allocation Type: Single-year Grants
• Research Field: Thin film/Surface and interfacial physical properties
• Research Institution: Kyoto University
• Principal Investigator: Sakabe Shuji 京都大学, 化学研究所, 教授 (50153903)
• Co-Investigator(Renkei-kenkyūsha): Hashida Masaki 京都大学, 化学研究所, 准教授 (50291034) ; Inoue Shunsuke 京都大学, 化学研究所, 助教 (40724711) ; Tokita Shigeki 大阪大学, レーザーエネルギー学研究センター, 講師 (20456825)
• Project Period (FY): 2011-04-01 – 2016-03-31
• Keywords: 電子線回折 / レーザー加速 / フェムト秒レーザー / 高強度レーザー / レーザープラズマ

Outline of Final Research Achievements

With an pulse of electrons which are produced and accelerated by the interaction of an intense femtosecond laser pulse with a foil target, compression of the electron pulse with a compact phase rotator, and "ultrafast electron diffraction (UED)" with the compressed electron pulses have been demonstrated. To develop high intensity electron source for single pulse UED, a new method “sheath break by laser pre-irradiation”, which pull out electrons efficiently from laser plasma, has been proposed and experimentally demonstrated with high-contrast laser pulse shaped by a plasma mirror. Derivative fruits of research have been also obtained, such as guiding and collimation of laser accelerated electrons on a metal wire, ultrafast electron deflectometry, and generation of strong terahertz surface wave on a metal wire.

Free Research Field

レーザー・レーザープラズマ科学