Study on New THz Free Electron Laser Generation Scheme Using Ultra-short Electron Beam

2017 Fiscal Year Final Research Report

• Project/Area Number: 26706026
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Quantum beam science
• Research Institution: Kyoto University
• Principal Investigator: Zen Heishun 京都大学, エネルギー理工学研究所, 助教 (80548371)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: テラヘルツ放射 / 加速器光源 / コヒーレント放射

Outline of Final Research Achievements

THz Coherent Undulator Radiations (THz-CUR), which is a quasi-monochromatic intense THz radiation, were generated by injecting a short bunch electron beam generated from photocathode RF gun with a bunch compression chicane. Experiments to investigate the basic parameters of the THz-CUR were carried out. As the results, the frequency tunable range and the maximum micro-pulse energy of the THz-CUR was determined as 0.17-0.65 THz and 1 micro-J (at 0.17 THz), respectively. Moreover, the intensity saturation was observed when the amount of charge in an electron bunch was increased higher than 80 pC. The intensity saturation gave us information of the performance limitation of this THz-CUR source.

Free Research Field

加速器・放射光・自由電子レーザ