日本原子力研究開発機構J-PARCセンターJ-PARC Center ◇ 319–1195 茨城県那珂郡東海村白方白根2番地4 ◇ 2–4 Shirakata-shirane, Tokai-mura, Naka-gun, Ibaraki Pref. 319–1195, Japan
J-PARC・物質生命科学実験施設（MLF）に設置された中性子実験装置は世界的にも大変ユニークである。ここでは，短パルス中性子源であるMLFの中性子源の特徴と，その特徴を最も有効に引き出すための飛行時間法について説明するとともに，世界的にも初めて導入した「多重入射エネルギー測定法」さらに「パルス整形チョッパー法」に基づく非弾性散乱装置の原理に加え，幾つかの特徴的な観測方法の原理について説明する。
J-PARC Materials & Life Science Facility (MLF) has state-of-the-art neutron instruments. In this report, we explain the character of the neutron source of MLF, which is a short pulsed neutron source, and the time-of-flight method, which can most effectively extract the performance of the source. Also we show the cutting edge technique for the inelastic neutron scattering by implementing “multi incidence energy method” and “pulse shaping chopper method,” including some examples of measurements. Those techniques were realized for the first time at MLF, and the instruments are now achieving the world leading performance.
Key words: J-PARC; Materials Life Science Facility; pulsed neutron; neutron instrumens
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