The first eight years of operation of the Cold Neutron Chopper Spectrometer (CNCS) at the Spallation Neutron Source in Oak Ridge is being reviewed. The instrument has been part of the facility user program since 2009, and more than 250 individual user experiments have been performed to date. CNCS is an extremely powerful and versatile instrument and offers leading edge performance in terms of beam intensity, energy resolution, and flexibility to trade one for another. Experiments are being routinely performed with the sample at extreme conditions: T~0.05K, p>=2GPa and B=8T can be achieved individually or in combination. In particular, CNCS is in a position to advance the state of the art with inelastic neutron scattering under pressure, and some of the recent accomplishments in this area will be presented in more detail.
Momentum and Energy Dependent Resolution Function of the ARCS Neutron Chopper Spectrometer at High Momentum Transfer: Comparing Simulation and Experimen
A simulational study of the indirect geometry neutron spectrometer, BIFROST at the European Spallation Source, from neutron source position to detector position
Evaluation of a method for time-of-flight, wavelength and distance calibration for neutron scattering instruments by means of a mini-chopper and standard neutron monitors
Multi-Grid Detector for Neutron Spectroscopy: Results Obtained on Time-of-Flight Spectrometer CNCS
多栅极探测器技术已经从原理验证和表征阶段发展而来。在这里,我们报告的性能的多栅极探测器,MG.CNCS原型,已安装和测试的冷中子斩波器谱仪,CNCS在SNS。这允许在操作仪器上与$^3$ He探测器的性能进行并排比较。演示器的有效面积为0.2 m $^2$。它是专门针对CNCS的规格定制的。该探测器于2016年6月安装,并从那时起开始运行,与CNCS的He-3探测器并行收集中子散射数据。在本文中,我们提出了一个全面的分析,这些数据,特别是仪器的能量分辨率,速率能力,背景和相对效率。稳定性,伽马射线和快中子灵敏度也进行了研究。在探测器组件中的散射的效果已经被测量,并提供输入比较的蒙特卡罗模拟。所有的数据进行比较,测量的$^3$ He探测器同时,显示所有的功能记录的一个探测器也记录了其他。能量分辨率非常匹配。我们发现,多网格是能够匹配的数据收集的$^3$他,并看到一个相当大的优势,在计数率能力的迹象。基于这些结果,我们相信,多重网格探测器将能够利用ESS前所未有的中子通量在斩波器谱仪上产生高质量的科学数据。
FINESSE: A Versatile Beamline for Fundamental Interactions with Neutrons at the European Spallation SourcE
Rio de Janeiro State University(里约热内卢州立大学);University of Minnesota(明尼苏达大学);European Spallation Source ERIC(欧洲散裂源);The Grainger College of Engineering, University of Illinois Urbana-Champaign(伊利诺伊大学厄巴纳-香槟分校格兰格工程学院);Lund University(隆德大学);Columbia University(哥伦比亚大学);Oak Ridge National Laboratory(橡树岭国家实验室);Stockholm University(斯德哥尔摩大学);Istituto Nazionale di Fisica Nucleare (INFN)(意大利国家核物理研究所);National Research Council of Italy (CNR)(意大利国家研究委员会);University of Milano-Bicocca(米兰比可卡大学);Technical University of Munich(慕尼黑工业大学);California Institute of Technology(加州理工学院);Universidad Europea de Valencia(瓦莱西亚欧洲大学);Polish Academy of Sciences(波兰科学院);Universidad Autónoma de Zacatecas(萨卡特卡斯自治大学);Jagiellonian University(雅盖隆大学);Chalmers University of Technology(查尔姆斯理工大学);University of Surrey(萨里大学);University of Tennessee(田纳西大学);Montclair State University(蒙特克莱尔州立大学);Chinese Academy of Science(中国科学院);China Spallation Neutron Source(中国散裂中子源);Indiana University Bloomington(印第安纳大学伯明顿分校)
Expanding Neutron Capacity at the ESS through Symbiotic Instruments: SLEIPNIR & Remora
Department of Physics, Technical University of Denmark(丹麦技术大学物理系);Data Management & Scientific Computing, European Spallation Source ERIC(欧洲散裂源ERIC数据管理与科学计算部);Spectroscopy Division, European Spallation Source ERIC(欧洲散裂源ERIC光谱学部);Jülich Centre for Neutron Science(朱利希中子科学中心);Heinz Maier-Leibnitz Zentrum, Technical University of Munich(慕尼黑大学海因茨·迈尔-莱布尼茨中心)
Developments of a 2D Position Sensitive Neutron Detector
中国空间中子源是国家“十二五”规划项目之一,目前正在广东省建设。在项目的第一阶段将安装三台中子谱仪,其中需要二维位置敏感热中子探测器。在中子探测器建造之前,2009年已经建造了一个二维200 mm × 200 mm的多丝正比室(MWPC)的原型,流动气体为Ar/CO2(90/10),并使用部分电子器件进行了55 Fe X射线测试,表现出良好的性能。在2009年的测试之后,中子探测器已经被构造成具有完整的电子设备,并在2010年填充了6atm.3He + 2.5atm.C3H8气体混合物。中子探测器已初步测试与Am/Be源。本文介绍了中子探测器的一些新进展,包括高压室的设计、气体净化系统的优化和充气工艺。本文还介绍了结果和讨论。