The Center for High Resolution Neutron Scattering (CHRNS)

9986442Glink这是对高分辨率中子散射中心(CHRNS)持续运营的续展奖励。CHRNS是由美国国家科学基金会和美国国家标准与技术研究院的中子研究中心(NCNR)联合资助的一家大型研究机构。它的任务是开发和操作最先进的中子散射仪器，在材料研究中有广泛的应用，供一般科学界使用。CHRNS目前有三个设施：1)30米高分辨率小角中子散射(SANS)仪器；2)自旋极化非弹性中子散射(SPINS)光谱仪；3)用于超高分辨率SANS的Bonse-Hart类型的完美晶体衍射仪(PCD)，将于2000年作为用户仪器投入使用。这两台SANS仪器结合在一起，能够在北美任何中子研究中心都能获得的最大范围的长度尺度上确定材料的统计平均结构信息。这些仪器被材料科学、化学、生物学和凝聚态物理领域的大学、政府和工业研究人员用于研究材料，如合成聚合物、金属合金、陶瓷、多孔介质、结构流体和凝胶、生物大分子和磁性材料。自旋光谱仪是一种具有全极化分析的冷中子三轴光谱仪，主要由凝聚态物理学家和物理化学家使用，在30至0.3皮秒的时间尺度上探测材料中原子的纳米级运动和磁矩。通过使用创新的仪器，SPINS为测量有序和无序系统中的低能磁、振动和旋转激发提供了更高的灵敏度。%美国国家标准与技术研究所中子研究中心(NCNR)的高分辨率中子散射中心(CHRNS)开发和运营最先进的中子散射仪器，在材料研究中有着广泛的应用，供一般科学界使用。CHRNS目前有三个设施：1)30米高分辨率小角中子散射(SANS)仪器；2)自旋极化非弹性中子散射(SPINS)光谱仪；3)用于超高分辨率SANS的Bonse-Hart类型的完美晶体衍射仪(PCD)，将于2000年作为用户仪器投入使用。这两台SANS仪器结合在一起，能够在1纳米到10微米的范围内确定材料的统计平均结构信息，这是北美任何中子研究中心都能获得的最宽范围。这些仪器被材料科学、化学、生物学和凝聚态物理领域的大学、政府和工业研究人员用于研究材料，如合成聚合物、金属合金、陶瓷、多孔介质、结构流体和凝胶、生物大分子和磁性材料。自旋光谱仪是一种冷中子三轴全极化分析光谱仪，主要由凝聚态物理学家和物理化学家使用，在皮秒的时间尺度上探测原子的纳米级运动和材料中的磁矩。通过使用创新的中子超镜传输偏振器，SPINS为测量有序和无序系统中的低能磁、振动和旋转激发提供了增强的灵敏度。*

9986442GlinkaThis is a renewal award for the continued operation of the Center for High Resolution Neutron Scattering (CHRNS). CHRNS is a major research facility jointly funded by the National Science foundation and the National Institute of Standards and Technology's Center for Neutron Research (NCNR). Its mission is to develop and operate state-of-the-art neutron scattering instrumentation, with broad application in materials research, for use by the general scientific community. CHRNS presently comprises three facilities: 1) a 30 meter, high resolution, small-angle neutron scattering (SANS) instrument; 2) a spin-polarized, inelastic neutron scattering (SPINS) spectrometer; and 3) a Bonse-Hart-type, perfect-crystal diffractometer (PCD) for ultra-high-resolution SANS that will become operational as a user instrument in 2000. The two SANS instruments combined are capable of determining statistically averaged structural information in materials on the widest range of length scale accessible at any neutron research center in North America. These instruments are used by university, government and industrial researchers in materials science, chemistry, biology and condensed matter physics to investigate materials such as synthetic polymers, metal alloys, ceramics, porous media, structured fluids and gels, biological macromolecules, and magnetic materials. The SPINS spectrometer is a cold neutron, triple-axis spectrometer with full polarization analysis that is used primarily by condensed matter physicists and physical chemists to probe nanoscale motions of atoms and magnetic moments in materials on time scales from 30 to 0.3 picoseconds. Through the use of innovative instrumentation, SPINS provides enhanced sensitivity for measuring low energy magnetic, vibrational and rotational excitations in ordered and disordered systems.%%%The Center for High Resolution Neutron Scattering (CHRNS) at the National Institute of Standards and Technology's Center for Neutron Research (NCNR) develops and operates state-of-the-art neutron scattering instrumentation, with broad application in materials research, for use by the general scientific community. CHRNS presently comprises three facilities: 1) a 30 meter, high resolution, small-angle neutron scattering (SANS) instrument; 2) a spin-polarized, inelastic neutron scattering (SPINS) spectrometer; and 3) a Bonse-Hart-type, perfect-crystal diffractometer (PCD) for ultra-high-resolution SANS that will become operational as a user instrument in 2000. The two SANS instruments combined are capable of determining statistically averaged structural information in materials on a scale from one nanometer to ten micrometers, the widest range accessible at any neutron research center in North America. These instruments are used by university, government and industrial researchers in materials science, chemistry, biology and condensed matter physics to investigate materials such as synthetic polymers, metal alloys, ceramics, porous media, structured fluids and gels, biological macromolecules, and magnetic materials. The SPINS spectrometer is a cold neutron, triple-axis spectrometer with full polarization analysis that is used primarily by condensed matter physicists and physical chemists to probe nanoscale motions of atoms and magnetic moments in materials on time scales in the picoseconds. Through the use of innovative neutron supermirror transmission polarizers, SPINS provides enhanced sensitivity for measuring low energy magnetic, vibrational and rotational excitations in ordered and disordered systems.***