Development of neutron phase space transfer optical devices

中子相空间传输光学器件的研制

• 批准号: 17360448
• 负责人: KANEKO Junichi
• 金额: $ 8.55万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17360448/
• 关键词: neutron; optical device; transfer of phase space; single crystal; vibration; quartz; Doppler effect

Changes in neutron intensity and diffraction angle form a vibrating quartz single crystal were investigated by a 2D neutron detector and time-of-flight method.A X-cut quartz single crystal in size of 3mm×120mm×14mm was used in an experiment. Quartz single crystal has polarization according to a X-axis, thus, perpendicular cut to this axis, I.e., X-cut has the largest displacement. Bias voltage of 40 V was applied to aluminum electrodes fabricated on the quartz crystal, and it was moved in the characteristic vibration frequency of 22.7 kHz. Maximum displacement of c.a. 5μm was observed using a microscope.A neutron diffraction experiment was carried out on the ULS (Ultra Small angle neutron scattering) system in JRR-3M; neutron beam of wavelength of 4.7 angstrom was used. A combination of a ZnS:Li scintillator and a position sensitive photo multiplier was used as a neutron detector. Neutron diffraction patterns were obtained with a vibrating quartz single crystal in 22.7 kHz; change of neutron diffraction patterns according to vibration period. Neutron intensity had two strong components. Velocity of 4.7 angstrom neutrons are c.a. 840 m/s, thus they move 1.8 cm in 44μs, I.e., a half of the vibration period. By change of 1.8 cm in position of the detector, neutron intensity was changed according to phase shifting in pi.Experimental results were compared with theoretical estimation. In the case of displacement caused by the Doppler effect was larger than that caused by deformation, experimental results of time dependence of diffracted neutrons' intensity were suit for a theoretical result.

采用二维中子探测器和飞行时间法研究了振动石英单晶的中子强度和衍射角的变化。实验中使用了尺寸为3mm×120mm×14mm的X切割石英单晶。单晶具有沿X轴的极化，因此，垂直于该轴的切割，即X切割具有最大的偏置电压。对石英晶体上制作的铝电极施加40 V电压，并以22.7 kHz的特征振动频率移动，使用显微镜观察到约5μm的最大位移。在ULS（超小型）上进行了中子衍射实验。 JRR-3M中的角中子散射）系统；使用波长为4.7埃的中子束：ZnS:Li的组合。使用闪烁体和位置敏感光电倍增管作为中子探测器，通过振动石英单晶获得中子衍射图样；中子衍射图样根据振动周期而变化，具有两个强分量。中子的速度约为 840 m/s，因此它们在 44μs 内移动 1.8 cm，即通过改变探测器位置1.8cm，中子强度根据π的相移而变化。在多普勒效应引起的位移大于理论估计的情况下，将实验结果与理论估计进行了比较。由于变形引起的，衍射中子强度随时间变化的实验结果与理论结果相符。

项目成果

中性子光学素子への応用を目指したPMT-PT単結晶の回折角度変化測定

中子光学器件中 PMT-PT 单晶衍射角变化的测量

• 发表时间: 2006
• 作者: 川村; 他
• 通讯作者: 他

Diffraction angle measurement of PMTPT single crystals aiming at a neutron optical device

针对中子光学器件的 PMTPT 单晶衍射角测量

• 发表时间: 2006
• 作者: S. Kawamura; J. H. Kaneko ; et. al.
• 通讯作者: et. al.

Deformation experiment of piezoelectric single-crystals for neutron-optical-devices

中子光学器件压电单晶变形实验

• 发表时间: 2005
• 作者: S. Kawamura; J. H. Kaneko ; et. al.
• 通讯作者: et. al.

Possibility of using a PMN–PT single crystal as a neutron optical device

使用 PMN–PT 单晶作为中子光学器件的可能性

• DOI: 10.1016/j.physb.2006.06.047
• 发表时间: 2006-11-15
• 期刊: Physica B-condensed Matter
• 影响因子: 2.8
• 作者: S. Kawamura;J. Kaneko;H. Fujimoto;Y. Otake;F. Fujita;A. Homma;T. Sawamura;P. Mikula;M. Furusaka
• 通讯作者: M. Furusaka