The Center for High Resolution Neutron Scattering (CHRNS)

9986442 Glinka这是对高分辨率中子散射中心（CHRNS）持续运作的一个更新奖励。CHRNS是由美国国家科学基金会和美国国家标准与技术研究所中子研究中心（NCNR）共同资助的一个主要研究设施。其使命是开发和操作最先进的中子散射仪器，广泛应用于材料研究，供一般科学界使用。 CHRNS目前有三个设施：（1）一台30米高分辨率小角中子散射仪;（2）一台自旋极化非弹性中子散射光谱仪;（3）一台用于超高分辨率小角中子散射的Bonse-Hart型全晶衍射仪，该仪器将于2000年作为用户仪器投入使用。 这两个SANS仪器相结合，能够确定统计平均结构信息的材料在最广泛的范围内的长度尺度在任何中子研究中心在北美。 这些仪器由材料科学、化学、生物学和凝聚态物理学领域的大学、政府和工业研究人员使用，以研究合成聚合物、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等材料。 SPINS光谱仪是一种冷中子三轴光谱仪，具有全偏振分析功能，主要用于凝聚态物理学家和物理化学家在30至0.3皮秒的时间尺度上探测材料中原子和磁矩的纳米级运动。 通过使用创新的仪器，SPINS提供了更高的灵敏度，用于测量有序和无序系统中的低能磁、振动和旋转激发。%美国国家标准与技术研究院中子研究中心（NCNR）的高分辨率中子散射中心（CHRNS）开发并操作最先进的中子散射仪器，广泛应用于材料研究，供一般科学界使用。 CHRNS目前有三个设施：（1）一台30米高分辨率小角中子散射仪;（2）一台自旋极化非弹性中子散射光谱仪;（3）一台用于超高分辨率小角中子散射的Bonse-Hart型全晶衍射仪，该仪器将于2000年作为用户仪器投入使用。 这两个SANS仪器相结合，能够确定从1纳米到10微米的材料统计平均结构信息，这是北美任何中子研究中心都可以获得的最宽范围。 这些仪器被材料科学、化学、生物学和凝聚态物理学领域的大学、政府和工业研究人员用于研究合成聚合物、金属合金、陶瓷、多孔介质、结构化流体和凝胶、生物大分子和磁性材料等材料。 SPINS光谱仪是一种冷中子三轴光谱仪，具有全偏振分析功能，主要用于凝聚态物理学家和物理化学家在皮秒时间尺度上探测材料中原子和磁矩的纳米级运动。通过使用创新的中子超镜透射偏振器，SPINS提供了更高的灵敏度，用于测量有序和无序系统中的低能磁、振动和旋转激发。

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.***