Magnetic lens system for focusing-geometry small-angle neutron scattering at MLF BL15 TAIKAN

MLF BL15大観の集光型小角散乱測定用磁気レンズシステム

廣井 孝介  ; 高田 慎一  ; 大石 一城*; 河村 幸彦*; 岩瀬 裕希*; 篠原 武尚   ; 奥 隆之   ; 鈴木 淳市*

Hiroi, Kosuke; Takata, Shinichi; Oishi, Kazuki*; Kawamura, Yukihiko*; Iwase, Hiroki*; Shinohara, Takenao; Oku, Takayuki; Suzuki, Junichi*

The small and wide angle neutron scattering instrument TAIKAN is designed to study hieratical structure using both neutrons in broad wavelength bandwidth and detectors covering wide-angle. In order to perform ultra-small angle neutron scattering measurement efficiently, a high-resolution two-dimensional detector and neutron focusing devices are installed in TAIKAN. Multiple magnetic lens system is adopted for pulsed neutron beam focusing because it is free from beam attenuation by the lens materials, and the chromatic aberration could be improved by changing the focusing condition synchronously with pulsed neutrons. In this presentation, we will show present status of this magnetic lens system and some experimental results of focusing SANS measurement.