Volume 03（1998）
1. ハイライト／HIGHLIGHT
[1]兵庫県企業庁播磨科学公園都市建設局長 Hyogo Prefectural Public Enterprises Agency Harima Science Garden City Construction Bureau, Director、[2]姫路工業大学高度産業科学技術研究所長 Laboratory of Advanced Science and Technology for Industry, Himeji Institute of Technology, Head、[3]先端科学技術支援センター所長 Center for Advanced Science and Technology, Head、[4]（財）高輝度光科学研究センター理事 JASRI, Director、[5]住友電気工業株式会社播磨研究所長 Harima R&D Laboratories, Sumitomo Electric Industries, Ltd., Head
（財）高輝度光科学研究センター 加速器部門 JASRI Accelerator Division
- Abstract
- Multi-bunch-mode, single-bunch-mode and several-bunch-mode operations of electron or positron beam were designed in the SPring-8 storage ring. At the beginning of the commissioning multi-bunch-mode operation was mainly carried out. At the same time the rf knockout system was tested in the synchrotron for a request of the single-bunchmode operation from users. A long pulse train of 1 μs or 40 ns is injected from the Linac to the synchrotron, one bunched beam is remained with the rf knockout system in the synchrotron and the beam is injected into an aimed bunch of the storage ring repeatedly. The several-bunch-mode operation could be realized and used for users of BL09. The impurity of the satellite buckets was less than 10－6. A beam life time at the current value of 19 mA in 21-bunchmodeoperation was about 18 hours. The phenomenon that purity became worse with the time was not observed at all. Sometimes the beam was injected into other bunches in addition to aimed bunches and the reason has been investigated.
（財）高輝度光科学研究センター 利用促進部門 JASRI Experimental Facilities Promotion Divison
（財）高輝度光科学研究センター 副理事長、放射光研究所長 JASRI Vice President, Director of JASRI Research Sector
（財）高輝度光科学研究センター 利用促進部門長 JASRI Experimental Facilities Promotion Division
2. SPring-8の現状／PRESENT STATUS OF SPring-8
日本原子力研究所・理化学研究所 大型放射光施設計画推進共同チーム 利用系グループ JAERI-RIKEN SPring-8 Project Team Experimental Group
日本原子力研究所・理化学研究所 大型放射光施設計画推進共同チーム 計画管理グループ JAERI-RIKEN SPring-8 Project Team Planning Adjustment Group
東京大学 大学院理学系研究科 Dept. of Chemistry, School of Science, the University of Tokyo
3. 共用ビームライン／PUBLIC BEAMLINE
（財）高輝度光科学研究センター 放射光研究所 利用促進部門長 JASRI Experimental Facilities Promotion Division
（財）高輝度光科学研究センター 利用促進部門 JASRI Experimental Facilities Division
[1]理化学研究所 播磨研究所RIKEN Harima Institute、[2]（財）高輝度光科学研究センター 利用促進部門 JASRI Experimental Facilities Divison
（財）高輝度光科学研究センター 利用促進部門 JASRI Experimental Facilities Divison
- Abstract
- The outline and the current situation of Extremely Dense State Beamline (BL10XU) which has the high pressure station and the high brilliance XAFS station are reported. After the commissioning on September 1997, a pre-edge peak of K2MoO4 is successfully observed in the Mo K-edge absorption spectrum, indicating the sufficient energy resolution of the monochromatized synchrotron radiation beam at BL10XU. In the high pressure station, perspicuous diffraction patterns under the ultra-high pressure are obtained. New high brilliance XAFS system using the undulator gap control synchronized with the monochromator scanning is described.
日本原子力研究所 関西研究所 放射光利用研究部 JAERI Kansai Research Establishment Dept. of Synchrotron Radiation Facilities
理化学研究所 播磨研究所 構造生物物理研究室 RIKEN Harima Institute Structual Biophysics Laboratory
- Abstract
- At the SPring-8, RIKEN beamline I has been designed and developed for structural biology research by the Institute of Physical and Chemical Research (RIKEN). RIKEN beamline I consists of two experimental stations, protein crystallography (PX) and small-angle X-ray scattering (SAXS). Both experiments can be carried out simultaneously. The SAXS branch uses the monochromatized undulator beam that enables us to obtain the data under various conditions. The PX branch has been designed based on a "trichromatic concept" to optimize for the MAD data collection.The construction of RIKEN beamline I had been progressed satisfactorily until June 1997. The commissioning successfully provided the branched undulator beams with a beam splitter, and the three different monochromatized undulator beams were successfully observed with the trichromator.
日本原子力研究所 関西研究所 放射光利用研究部 JAERI Kansai Research Establishment Dept. of Synchrotron Radiation Facilities
（財）高輝度光科学研究センター 利用促進部門 JASRI Experimental Facilities Promotion Division
[1]理化学研究所 播磨研究所 RIKEN Harima Institute、[2]姫路工業大学 大学院理学研究科 Division of Biological Sciences, Graduate School of Science, Himeji Institute of Technology、[3]（財）高輝度光科学研究センター 放射光研究所 JASRI Research Sector
4. 最近の研究から／FROM LATEST RESEARCH
東京大学物性研究所 Institute for Solid State Physics, University of Tokyo
- Abstract
- X-ray emission spectroscopy (XES) is one of the most important spectroscopies to make a remarkable progress utilizing third generation synchrotron radiation sources. Here, I discuss some aspects of XES in rare earth compounds and transition metal compounds on the basis of our theoretical analysis of recent experimental data. Some prospects of future investigations are also given.
日本原子力研究所 大型放射光開発利用研究部 JAERI Dept. of Synchrotron Radiation Facility Project
[1]東京大学物性研究所 Institute for Solid State Physics, University of Tokyo、 [2]岡山大学理学部 Faculty of Science, Okayama University
- Abstract
- Magnetic circular x-ray dichroism (MCXD) in L edges of the entire series of rare-earth elements is reviewed. Some confusions in the sign of MCXD spectra observed are examined and solved introducing a new role to the 4f-5d exchange interaction. We discuss some aspects of these investigations and relating problems.
東京工業大学応用セラミックス研究所 Materials and Structure laboratory, Tokyo Institute of Technology
- Abstract
- X-ray scattering has become a unique probe of atom-scale magnetic structures in surfaces and thin films by the discovery of resonant X-ray magnetic scattering and the advent of third-generation synchrotron sources. The power of the technique is demonstrated in an application to the determination of the magnetization structures in Fe/Gd multilayers at ambient and low temperatures. Discussion is presented on the experimental determination of resonant magnetic scattering factors, fm' and fm", and of magnetic roughness at interfaces through measurement of resonant magnetic diffuse scattering.
[1]理化学研究所 播磨研究所 RIKEN Harima Institute、[2]（財）高輝度光科学研究センター 実験部門 JASRI Experimental Research Division、[3]理化学研究所 播磨研究所 RIKEN Harima Institute
- Abstract
- An X-ray undulator beamline, BL47XU, is allocated to the first 'R&D beamline' to serve both scientific and technical R&D's. The tentative mission at the initial phase are those R&D's for (i) novel optics, (ii) various imaging techniques and applications, (iii) methodology for electron beam emittance measurement using emitted synchrotron radiation. From April, 1998, part of the beamline is open to the outside users. Here we report some of the experimental results obtained at this beamline.
理化学研究所 Ｘ線干渉光学研究室 Coherent X-Ray Optics Laboratory, RIKEN Harima Institute
[1]（財）高輝度光科学研究センター 放射光研究所 JASRI Research Sector、[2]理化学研究所 播磨研究所 RIKEN Harima Institute
日本原子力研究所 関西研究所 放射光利用研究部 Dept. of Synchrotron Radiation Facilities, JAERI Kansai Research Establishment
理化学研究所・播磨研究所 Ｘ線干渉光学研究室 Coherent X-ray Optics Laboratory, RIKEN Harima Institute
- Abstruct
- Ionization Chambers are widely in use as X-ray beam intensity monitors in synchrotron radiation experiments, but it has been known that proportionality degradation will be caused by electron-ion recombination process when high ionizing current is generated in the ionizing charged particle experiment. Proportionality degradation due to intense X-ray beam was experimentally investigated at the BL47XU to cope with the high current storage ring operation and improvement of beamline X-ray optics devices.
理化学研究所 播磨研究所 RIKEN Harima Institute
- Abstract
- RIKEN beamline II (BL44B2) has been designed and constructed by RIKEN Structural Biology Group at RIKEN Harima Institute. BL44B2 supplies narrow bandpass, rapidly tunable X-rays for XAFS experiment and protein crystallography, and wide bandpass, intense white X-rays for time-resolved Laue crystallography as well.
5. 研究会等報告／WORKSHOP AND COMMITTEE REPORT
日本原子力研究所 大型放射光開発利用研究部 JAERI Dept. of Synchrotron Radiation Facility Project
日本原子力研究所 大型放射光開発利用研究部 JAERI Dept. of Synchrotron Radiation Facility Project
（財）高輝度光科学研究センター 放射光研究所 JASRI Research Sector
- Abstract
- Helicity-modulation technique for accurate measurements of x-ray magnetic circular dichroism (XMCD) has been developed by a combination of a diamond x-ray phase retarder and a phase-sensitive detection system. A measured XMCD spectrum at the Fe K-edge in CoFe2O4 agreed with that obtained with a conventional magnetic field inversion method. The new technique gave the spectrum with higher statistical accuracy in shorter measuring time.
シンポジウム実行委員会委員長 京都教育大学 The Executive Committee Chairman, Kyoto University of Education
理化学研究所播磨研究所生体物理化学研究室分室 RIKEN Harima Institute Biophysical Chemistry Laboratory
日本原子力研究所・理化学研究所 大型放射光施設計画推進共同チーム 利用系グループ JAERI-RIKEN SPring-8 Project Team Experimental Group
（財）高輝度光科学研究センター放射光研究所 JASRI Synchrotron Radiation Research Institute
理化学研究所 播磨研究所 構造生物物理研究室 RIKEN Harima Institute, Structural Bio-physics Research Group
6. 利用業務部からのお知らせ／FROM USERS OFFICE
元日本原子力研究所・理化学研究所 大型放射光施設計画推進共同チーム員 JAERI-RIKEN SPring-8 Project Team Member
高エネルギー加速器研究機構・物質構造科学研究所 Institute of Materials Structure Science, High Energy Accelerator Research Organization
姫路工業大学 理学研究科／理研 Junior Research Associate Faculty of Science, Himeji Institute of Technology / RIKEN Junior Research Associate
7. ユーザー便り／A LETTER FROM SPring-8 USERS
[1]兵庫県企業庁播磨科学公園都市建設局長 Harima Science Garden City Construction Bureau, Hyogo Prefectural Public Enterprises Agency、[2]まちづくり推進課 ibid.
北海道大学 大学院理学研究科 Division of Biological Sciences Graduate School of Science, Hokkaido University
東京大学 物性研究所 Institute for Solid State Physics, University of Tokyo
岡山大学 自然科学研究科 Natural Science and Technology, Okayama University
徳島大学 総合科学部 Faculty of Integrated Arts and Science, Tokushima University
㈱東芝 先端半導体デバイス研究所 TOSHIBA Advanced Semiconductor Devices Research Laboratories
大阪大学 産業科学研究所 The Institute of Scientific Industrial Research, Osaka University
岡山大学 固体地球研究センター Institute for Study of the Earth's Interior, Okayama University
