A new approach to deuterium ion sources for deuterium-tritium neutron generators is being developed. The source is based upon the field desorption of deuterium from the surfaces of metal tips. Field desorption studies of microfabricated field emitter tip arrays have been conducted for the first time. Maximum fields of 30 V/nm have been applied to the array tip surfaces to date, although achieving fields of 20 V/nm to possibly 25 V/nm is more typical. Both the desorption of atomic deuterium ions and the gas phase field ionization of molecular deuterium has been observed at fields of roughly 20 V/nm and 20-30 V/nm, respectively, at room temperature. The desorption of common surface adsorbates, such as hydrogen, carbon, water, and carbon monoxide is observed at fields exceeding ~10 V/nm. In vacuo heating of the arrays to temperatures of the order of 800 C can be effective in removing many of the surface contaminants observed.
Neutron Resonance Transmission Analysis with a Compact Deuterium-Tritium Neutron Generator
中子共振透射分析（NRTA）是一种光谱技术，它利用超热中子的共振吸收来推断物体的同位素组成。这种光谱技术在许多传统的科学和核安全领域都具有相关性。NRTA过去使用大型昂贵的加速器设施来实现精确的中子束，这大大限制了其适用性。在这项工作中，我们描述了一系列的NRTA实验中，我们使用一个紧凑的，低成本的氘氚（DT）中子发生器产生短中子束（2.6米）随着$^6$锂玻璃中子探测器。五种元素--银、镉、钨、铟和$^{238}$ U --的飞行时间光谱数据清楚地显示了1-30 eV范围内的相应吸收线。实验结果表明，NRTA在这种简化的配置的适用性，并证明了这种紧凑和低成本的方法的可行性。这将大大拓宽NRTA的适用范围，使其在材料科学、核工程和军备控制等许多领域都具有实用性和适用性。
Commissioning of a mobile neutron spectrometer for LNGS
University of L’Aquila（拉奎拉大学）；INFN, Laboratori Nazionali del Gran Sasso（意大利国家核物理研究所，格兰萨索国家实验室）；Karlsruhe Institute of Technology（卡尔斯鲁厄理工学院）；Heidelberg University（海德堡大学）
Design Studies Of A Pulsed Quasimonoenergetic 2-keV Neutron Source For Calibration Of Low Threshold Dark Matter Detectors
University of Massachusetts, Amherst（马萨诸塞大学阿默斯特分校）；Lawrence Berkeley National Laboratory（劳伦斯伯克利国家实验室）；University of California Berkeley（加州大学伯克利分校）；High Energy Accelerator Research Organization (KEK)（高能加速器研究机构（KEK））；Florida State University（佛罗里达州立大学）；National High Magnetic Field Laboratory（国家高磁场实验室）
