A novel time-spatial-focusing momentum-correction analyzer for the near-backscattering spectrometer DIANA at J-PARC

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• 作者：Nobuaki Takahashi ; Kaoru Shibata ; Taku J. Sato ; Masatoshi Arai ; Ferenc Mezei
• 关键词：Inelastic neutron scattering ; Backscattering ; Analyzer ; Time focusing ; Spatial focusing ; Momentum correction
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2008
• 出版时间：21 March 2008
• 年：2008
• 卷：587
• 期：2-3
• 页码：350-362
• 全文大小：2759 K

文摘

We have developed a novel configuration concept of crystal chips for time-of-flight (TOF) crystal-analyzer neutron inelastic scattering spectrometers, which simultaneously achieve time-focusing, spatial-focusing and momentum-correcting abilities. This concept will be adopted for the planned TOF near-backscattering spectrometer, DIANA which has been proposed for construction at the Japan Proton Accelerator Research Complex (J-PARC). We will first discuss the new analyzer layout method satisfying both time- and spatial-focusing and momentum-correction concepts and then the focusing performances as evaluated by Monte-Carlo simulations and compared to the generally used energy-focusing analyzer configuration.