Volume 03, No.2

目次 / Table of Contents

March issue 1998

1. ハイライト／HIGHLIGHT

セベラルバンチ運転の状況−マシンからの報告-
Status of Several-bunches-mode Operation -report by accelerator division-

鈴木　寛光　SUZUKI Hiromitsu、川島　祥孝　KAWASHIMA Yoshitaka、谷　教夫　TANI Norio、細田　直康　HOSODA Naoyasu、米原　博人　YONEHARA Hiroto
　

（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.

Pages 1 - 7 Download PDF (137.43 KB)

セベラルバンチ運転の状況−ビームラインからの報告−
Status of Several-bunches-mode Operation -report by beamline division-

矢橋　牧名　YABASHI Makina

（財）高輝度光科学研究センター　ビームライン部門　JASRI Beamline Division

Pages 8 - 10 Download PDF (62.63 KB)

2. SPring-8の現状／PRESENT STATUS OF SPring-8

実験ホール内輸送チャンネルの建設状況（その7）
Present Status of the Transport Channel (No.7)

石川　哲也　ISHIKAWA Tetsuya

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

Pages 11 - 12 Download PDF (74.71 KB)

SPring-8の運転・利用状況と運転計画
SPring-8 Operational News

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

Pages 13 - 15 Download PDF (50.66 KB)

3. 共用ビームライン／PUBLIC BEAMLINE

高エネルギー非弾性散乱BL08W実験ステーションの現状
Current Status of High Energy Inelastic Scattering BL08W Experimental Station

山岡　人志　YAMAOKA Hitoshi^[1]、水牧　仁一朗　MIZUMAKI Masaichiro^[2]

^[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

Pages 16 - 20 Download PDF (242.49 KB)

高圧構造物性BL10XU実験ステーションの現状
Current Status of Extremely Dense State BL10XU Experimental Station

石井　真史　ISHII Masashi

（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 K₂M_oO₄ 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.

Pages 21 - 24 Download PDF (92.78 KB)

生体分析BL39XU実験ステーションの現状
Current Status of Physicochemical Analysis BL39XU Experimental Station

後藤　俊治　GOTO Shunji

（財）高輝度光科学研究センター　ビームライン部門　JASRI Beamline Division

Pages 25 - 28 Download PDF (61.60 KB)

4. 最近の研究から／FROM LATEST RESEARCH

希土類のL吸収端における磁気円偏光二色性
Magnetic Circular X-ray Dichroism in L Absorption Edges of Rare-Earth Elements

小谷　章雄　KOTANI Akio^[1]、原田　勲　HARADA Isao^[2]、圓山　裕　MARUYAMA Hiroshi^[2]

^[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.

Pages 29 - 33 Download PDF (102.24 KB)

Ｘ線共鳴散乱による磁性多層膜の磁気構造解析
Magnetic Structure of Thin-film Multilayers by Resonant X-ray Scattering

橋爪　弘雄　HASHIZUME Hiroo

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.

Pages 34 - 38 Download PDF (107.33 KB)

８の字アンジュレータについて
About Figure-8 Undulator

田中　隆次　 TANAKA Takashi、北村　英男　 KITAMURA Hideo

（財）高輝度光科学研究センター　ビームライン部門　JASRI Beamline Division

Pages 39 - 42 Download PDF (143.66 KB)