Seeded FEL for full-coherent sub-angstrom

2013 Fiscal Year Final Research Report

• Project/Area Number: 24656069
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Single-year Grants
• Research Field: Applied physics, general
• Research Institution: Japan Synchrotron Radiation Research Institute
• Principal Investigator: MATSUBARA Shinichi 公益財団法人高輝度光科学研究センター, XFEL利用推進研究室, 研究員 (90532135)
• Co-Investigator(Kenkyū-buntansha): TAKAHASHI Eiji 独立行政法人理化学研究所, 緑川研レーザ物理工学究室, 専任研究員 (80360577) ; OKAYASU Yuichi (公財)高輝度光科学研究センター, 加速器部門, 研究員 (90509910)
• Co-Investigator(Renkei-kenkyūsha): TOGASHI Tadashi (公財)高輝度光科学研究センター, XFEL利用研究推進室, 研究員 (60415239) ; TANAKA Takashi 独立行政法人理化学研究所, 放射光科学総合研究センター, 専任研究員 (30321780) ; SATOU Takahiro 独立行政法人理化学研究所, 放射光科学総合研究センター, 特別研究員 (30599113)
• Project Period (FY): 2012-04-01 – 2014-03-31
• Keywords: 加速器 / 高次高調波 / シードFEL

Research Abstract

The aim of the research is investigation into techniques for a seeded free-electron laser (FEL). The Seeded FEL have advantageous features that output pulses are in principle fully coherent in both transverse and longitudinal axes. We researched a new seeded FEL method with a radial-polarized laser pulse for the seeding source of it. Then, the radial-polarized laser pulses, which are high-harmonic-generation, was tried to make Then, generating of the radial-polarization was tried for using the seeding light source. Moreover, we developed one of key schemes for seeded FEL operation which is a timing monitor system. It enables to observe a timing drift between electron-bunches and laser pulses with an electro-optic sampling technique.

Research Products

• [Presentation] EO-SAMPLING-BASED TEMPORAL OVERLAP CONTROL SYSTEM FOR A SEEDED FEL (2012)
  • Author(s): S. Matsubara, A. Iwasaki, S. Owada, T. Sato, K. Ogawa, T. Togashi1, E.J. Takahashi, M. Aoyama, Y. Okayasu, T. Watanabe, and H. Tomizawa
  • Organizer: IBIC2012
  • Place of Presentation: Tsukuba, Japan
  • Year and Date: 2012-10-01