Ellipsoidal focusing mirror for intense beam formation of hard-x-ray free electron laser

• Project/Area Number: 25286095
• 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: Japan Synchrotron Radiation Research Institute
• Principal Investigator: Yumoto Hirokatsu 公益財団法人高輝度光科学研究センター, 光源・光学系部門, 研究員 (20423197)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000); Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2014: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000); Fiscal Year 2013: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
• Keywords: 部分回転楕円面ミラー / X線集光光学素子 / X線自由電子レーザー / 超精密加工 / 表面形状計測 / 非球面 / 放射光 / X線光学素子 / X線ミラー / 形状計測 / 楕円面ミラー

Outline of Final Research Achievements

By the development of fabrication techniques of a high-precision surface processing and a high-precision surface profiler, we successfully realized an ultra-precision ellipsoidal focusing mirror with a 1 nm figure accuracy that could not have been achieved by conventional fabrication methods. A two-dimensional nano-focusing beam with a beam size of 85 nm × 125 nm (full width at half maximum) at an x-ray energy of 7 keV was established with the developed ellipsoidal mirror. An extremely intense beam with a power density of 10 to the 20th power (W/cm2) can be expected by using the developed ellipsoidal mirror at a hard x-ray free electron laser facility.

Research Products

• [Journal Article] Stitching interferometry for ellipsoidal x-ray mirrors (2016)
  • Author(s): Hirokatsu Yumoto, Takahisa Koyama, Satoshi Matsuyama, Kazuto Yamauchi, and Haruhiko Ohashi
  • Journal Title: Review of Scientific Instruments Volume: 印刷中
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Ultra-high-precision surface processing techniques for nanofocusing ellipsoidal mirrors in hard x-ray region (2014)
  • Author(s): H. Yumoto, T. Koyama, S. Matsuyama, K. Yamauchi, and H. Ohashi
  • Journal Title: Proc. SPIE Volume: 9206 Pages: 920605-920605
  • DOI: 10.1117/12.2063146
  • Acknowledgement Compliant
• [Presentation] Ellipsoidal mirror for two-dimensional nanofocusing in the hard x-ray region (2016)
  • Author(s): Hirokatsu Yumoto
  • Organizer: XOPT2016 (International Conference on X-ray optics, detectors, sources, and their applications 2016)
  • Place of Presentation: Pacifico Yokohama, Japan
  • Year and Date: 2016-05-18
  • Int'l Joint Research / Invited
• [Presentation] 硬X線用部分回転楕円面集光ミラーの作製と集光評価 (2016)
  • Author(s): 湯本博勝、小山貴久、松山智至、香村芳樹、山内和人、石川哲也、大橋治彦
  • Organizer: 2016年度精密工学会春季大会学術講演会
  • Place of Presentation: 東京理科大学 野田キャンパス（千葉県野田市）
  • Year and Date: 2016-03-15
• [Presentation] X-ray Micro-focusing with Ellipsoidal Mirror (2016)
  • Author(s): Hirokatsu Yumoto
  • Organizer: Microbeam Workshop for Macromolecular Crystallography
  • Place of Presentation: National Synchrotron Radiation Research Center (NSRRC) Hsinchu Taiwan
  • Year and Date: 2016-03-03
  • Int'l Joint Research / Invited
• [Presentation] 硬X線用楕円面集光ミラー作製法と集光特性 (2016)
  • Author(s): 湯本博勝、小山貴久、松山智至、香村芳樹、山内和人、石川哲也、大橋治彦
  • Organizer: 第29回日本放射光学会年会 放射光科学合同シンポジウム
  • Place of Presentation: 東京大学 柏の葉キャンパス（千葉県柏市）
  • Year and Date: 2016-01-09
• [Presentation] Surface profiler for off-axis ellipsoidal mirror (2015)
  • Author(s): Hirokatsu Yumoto, Takahisa Koyama, Satoshi Matsuyama, Kazuto Yamauchi, and Haruhiko Ohashi
  • Organizer: IWXM2015(International Workshop on X-Ray Optics and Metrology)
  • Place of Presentation: Berkeley, California, USA
  • Year and Date: 2015-07-13 – 2015-07-16
• [Presentation] X-ray micro-focusing with off-axis ellipsoidal mirror (2015)
  • Author(s): Hirokatsu Yumoto, Takahisa Koyama, Satoshi Matsuyama, Yoshiki Kohmura, Kazuto Yamauchi, Tetsuya Ishikawa, and Haruhiko Ohashi
  • Organizer: SRI2015(Synchrotron Radiation Instrumentation)
  • Place of Presentation: New York, USA
  • Year and Date: 2015-07-06 – 2015-07-10
• [Presentation] Development of fabrication methods for ellipsoidal focusing mirrors (2014)
  • Author(s): H. Yumoto, T. Koyama, S. Matsuyama, K. Yamauchi, and H. Ohashi
  • Organizer: XRM2014: The 12th International Conference on X-Ray Microscopy
  • Place of Presentation: Melbourne Australia
  • Year and Date: 2014-10-26 – 2014-10-31
• [Presentation] 硬X線用部分回転楕円面集光ミラーの作製－高精度非球面加工法によるミラー表面の形状修正加工－ (2014)
  • Author(s): 湯本博勝，小山貴久，松山智至，山内和人，大橋治彦
  • Organizer: 2014年度精密工学会秋季大会学術講演会
  • Place of Presentation: 鳥取大学鳥取キャンパス，鳥取県鳥取市
  • Year and Date: 2014-09-16 – 2014-09-18
• [Presentation] 高精度形状計測法と非球面加工法を利用した硬Ｘ線楕円面集光ミラーの形状修正 (2014)
  • Author(s): 湯本博勝、小山貴久、松山智至、山内和人、大橋治彦
  • Organizer: 第27回日本放射光学会年会・放射光科学合同シンポジウム
  • Place of Presentation: 広島国際会議場
• [Presentation] 硬X線用部分回転楕円面集光ミラーのための表面加工プロセスの開発 (2014)
  • Author(s): 湯本博勝、小山貴久、松山智至、山内和人、大橋治彦
  • Organizer: 2014年度精密工学会春季大会学術講演会
  • Place of Presentation: 東京大学
• [Presentation] Deformable mirror and stitching interferometry for nano-focusing (2013)
  • Author(s): Hirokatsu Yumoto
  • Organizer: APS-ESRF-SPring-8 Three-Way Optics Workshop
  • Place of Presentation: APS Argonne USA
• [Presentation] 硬X線用部分回転楕円面集光ミラーの開発－高精度形状修正加工法と高精度スティッチング表面形状計測法を利用したミラー作製－ (2013)
  • Author(s): 湯本博勝、小山貴久、松山智至、山内和人、大橋治彦
  • Organizer: 2013年度精密工学会秋季大会学術講演会
  • Place of Presentation: 関西大学