[en] The paper presents in foil form some information and remarks concerning plans to build a European spallation source for neutron scattering applications

[en] The paper analyses in foil form the possibilities for a staged approach in the development of intense neutron sources

[en] The paper presents in foil form the U.S. neutron source effort which is concentrated on the D-Li concept

[en] The paper presents in foil form the general features of an intense t-H₂O source

[en] The full text of publication follows. The Spallation Neutron Source (SNS) is an accelerator-based neutron facility under construction in Oak Ridge, Tennessee. The project is a collaboration of 6 partner laboratories: Lawrence Berkeley (LBNL), Los Alamos (LANL), Argonne (ANL), Brookhaven (BNL), Jefferson (Jlab), and Oak Ridge (ORNL). To achieve the performance goals, the SNS accelerator facility must deliver over one megawatt of beam power to a mercury target. This talk will describe the beam diagnostic instrumentation required to commission and operate such a facility at high beam power. Status of the SNS construction and recent beam commissioning results will also be presented. (author)

[en] The paper presents in foil form the target design analyses for an intense t-H₂O neutron source

[en] This paper describes the calculational procedures employed in the ongoing neutronics analysis of the ANS cold source and presents in chronological order some of the more important results from the one- and two-dimensional discrete calculations performed to date in support of the ANS cold source design. In particular, cold neutron currents from cryostat shapes which can be adequately modeled with two-dimensional geometries are compared with and without reentrant cavities. Also, results are presented from one-dimensional comparative liquid hydrogen vs liquid deuterium calculations in which the density, placement, and para-ortho mixture of liquid hydrogen is investigated. In addition, the evolution of the ANS conceptual design cold source from an initial short cylindrical cryostat with hemispherical upper and lower heads employing a natural convection liquid deuterium circulation system to the final spherical design employing a pumped system is described. Finally, performance data and heating rates are presented for some possible alternate ANS cryostat and vacuum jacket materials

[en] In 2009 the European Union launched the European Spallation Source project (ESS), whose aim is to produce pulsed neutron beams. ESS is composed of a linear accelerator that accelerates protons up to 2.5 GeV. The proton beam is then converted into a pulsed beam of 3.5 ms with a 14 Hz frequency and is directed toward a rotating, helium-cooled tungsten target. Spallation reactions that take place in the target produce a flux of epithermal neutrons that can be slowed down. The pulsed structure of the neutron beam will allow the physicists to perform time-of-flight experiments on the full neutron spectrum which is not possible with continuous neutron sources like nuclear reactors. ESS is expected to produce its first neutrons in 2019 and will be fully operational in 2023-2025 with 22 experimental lines. 17 European countries are involved in the construction of the ESS. (A.C.)

[en] This is the final report for a two-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The project sought to design a next-generation spallation source neutron target system for the Manuel Lujan, Jr., Neutron Scattering Center (LANSCE) at Los Alamos. It has been recognized for some time that new advanced neutron sources are needed in the US if the country is to maintain a competitive position in several important scientific and technological areas. A recent DOE panel concluded that the proposed Advanced Neutron Source (a nuclear reactor at Oak Ridge National Laboratory) and a high-power pulsed spallation source are both needed in the near future. One of the most technically challenging designs for a spallation source is the target station itself and, more specifically, the target-moderator-reflector arrangement. Los Alamos has demonstrated capabilities in designing, building, and operating high-power spallation-neutron-source target stations. Most of the new design ideas proposed worldwide for target system design for the next generation pulsed spallation source have either been conceived and implemented at LANSCE or proposed by LANSCE target system designers. These concepts include split targets, flux-trap moderators, back scattering and composite moderators, and composite reflectors

[en] The application concerns a two stage neutron gun using an X-ray tube with a conical focus, where neither the physics nor the technology are part of the present state of knowledge. (DG)