Pulse radiolysis in terahertz range

2014 Fiscal Year Final Research Report

• Project/Area Number: 25870404
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Nuclear engineering; Quantum beam science
• Research Institution: Osaka University
• Principal Investigator: KAN Koichi 大阪大学, 産業科学研究所, 助教 (60553302)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 超短パルス電子ビーム / パルスラジオリシス / テラヘルツ波 / 光伝導アンテナ

Outline of Final Research Achievements

In this study, two electron beams with energy of 32 MeV, which are called as “double-decker electron beams”, were generated. Pulse radiolysis using terahertz (THz) probe pulses was developed based on the electron beams used as irradiation and probe sources. Transient decrease in transmittance of semiconductor (high-resistivity silicon) was observed in THz range when the electron beam induced quasi-free electrons in the semiconductor. Techniques of advanced spectroscopy for THz probe pulses emitted from electron beams were developed using a large-apertured photoconductive antenna with microstructured electrodes. Feasibilities of time-domain measurement of coherent transition radiation, which is emitted from a femtosecond electron beam, were indicated.

Free Research Field

量子ビーム科学