Development of a High-Intensity and High-Efficiency Coherent Light Source by a New Method

2014 Fiscal Year Final Research Report

• Project/Area Number: 24651102
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• 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 – 2015-03-31
• Keywords: 量子ビーム / 光源技術 / 加速器 / 高性能レーザー

Outline of Final Research Achievements

Free-electron laser coverts kinetic energy of a high energy electron beam to laser light though its conversion efficiency is not high. High intensity coherent radiation is generated in a wavelength region around the bunch length of an electron beam when it is bent in a magnetic field, but the bunch length is not shorter than 1 mm. This study aimed to develop a new method for generation of high-intensity monochromatic coherent light using free electron laser as a short electron bunch generator. The energy profile of the electron beam was measured for the free-electron laser in operation and it turned out the energy spread was larger than expected. Micro-bunches generated in the free-electron laser are considered to be smoothed out in a uniform magnetic field, so that it is necessary to adopt a special magnetic field to maintain the bunching.

Free Research Field

加速器、自由電子レーザー