Search for a new operation mode of a free-electron laser

2015 Fiscal Year Final Research Report

• Project/Area Number: 24310069
• 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: Osaka University
• Principal Investigator: ISOYAMA Goro 大阪大学, 産業科学研究所, 教授 (80125989)
• Co-Investigator(Kenkyū-buntansha): KATO Ryukou 大阪大学, 産業科学研究所, 准教授 (20273708) ; KAWASE Keigo 大阪大学, 産業科学研究所, 助授 (60455277) ; IRIZAWA Akinori 大阪大学, 産業科学研究所, 助授 (90362756)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: 量子ビーム / FEL / テラヘルツ / 放射光

Outline of Final Research Achievements

We have conducted studies for upgrade and performance evaluation of the far-infrared or terahertz (THz) free-electron laser (FEL) based on the L-band electron linac at ISIR, Osaka University. A grid pulser for the electron gun of the linac was developed to make charge of electron bunches four times higher and consequently a high intensity THz beam with micropulse energies higher than 0.1 mJ was successfully generated at wavelengths around 70 um or frequencies around 4.2 THz, which is ten times higher than previous values obtained with FELs in the same frequency region. The linac has been also upgraded for stable and reproducible operation, so that the stability of the FEL beam becomes higher. Thus we have established bases for application experiments using the high intensity THz beam generated with the FEL.

Free Research Field

加速器科学