... Accession Number : AD0196177. Title : PARTICLE ACCELERATORS AS NEUTRON SOURCES FOR NEUTRON RADIOGRAPHS. ...

Oak Ridge National Laboratory Physics Division The Oak Ridge Electron Linear Accelerator Pulsed Neutron Source The ORELA is a powerful electron accelerator-based neutron source...

Discussions on considerations and design of shielding for spallation neutron sources at accelerator facilities are summarized. (WHK)

Several of the neutron scattering instruments at the Intense Pulsed Neutron Source (IPNS) at Argonne use neutron choppers for monochromatization of the neutron beam. Since the neutron burst is produced by a proton beam extracted from the Rapid Cycling Syn...

... Accession Number : AD0193695. Title : PORTABLE ACCELERATING TUBE WITH ION SOURCE FOR NEUTRON GENERATOR. Corporate Author : ...

. Scott. The design and testing high power lithium target for accelerator-based boron neutron capture therapy. Research and Development in Neutron Capture Therapy, Eds.: W. Sauerwein, R. Moss, and A. Wittig . - , , . , . [1] B. Bayanov, et al. Accelerator based neutron ...

A modeling investigation was performed to choose moderator material and size for creating optimal epithermal neutron beams for BNCT based on a proton accelerator and the 7Li(p,n)7Be reaction as a neutrons source. An optimal configuration is suggested for ...

... Descriptors : *TRITIUM, *PARTICLE ACCELERATOR TARGETS, *NEUTRON FLUX, SOURCES, DEUTERON REACTIONS, TRITON BEAMS, ION ...

An Accelerator-based Neutron Generator is described that consists of a 30-MeV deuteron linear accelerator using a flowing liquid lithium target. With a continuous deuteron current of 100 milliamperes, a source intensity of more than 10 exp 16 neutrons per...

The Spallation Neutron Source (SNS) to be built at the Oak Ridge National Laboratory will provide an intense source of neutrons for a large variety of experiments. It consists of a high-energy (1-GeV) and high-power (;1-MW) proton accelerator, an accumula...

Several positive-ion accelerators that are used as neutron sources for activation analysis are described. These accelerators produce neutrons from (p,n) or (d,n) reactions. The Van de Graaff accelerator and two portable neutron generators are ...

Neutron fields in occupationally accessible areas around nuclear reactors, radioisotope sources and medical and high energy accelerators have been characterized using currently available information. Neutron, rem meters, such as the Leake detector, are th...

The methology of radio biological experiments using radioactive isotopes as neutron sources is discussed as are accelerators and reactors. The physical mechanisms of neutron interaction with biological objects, methods of measuring and calculating the abs...

Travelling wave linear electron accelerators (LEA) are widely used in the circuits of pulse sources and neutron selectors. Previous investigations on optimizing the parameters of waveguide accelerators of neutron sources have shown certain advantages of u...

This is the progress report for the project entitled, ''An Accelerator Neutron Source for BNCT.'' The progress report is for the period from July 1, 1993 to date. The overall objective of our research project is to develop an Accelerator Epithermal Neutro...

A pilot accelerator-based source of epithermal neutrons, which is intended for wide application in clinics for boron neutron capture therapy, has been constructed at the Budker Institute of Nuclear Physics (Novosibirsk). A stationary proton beam has been obtained and near-threshold neutron ...

This paper outlines the major activities and applications of the Unified Accelerator Library environment for the Spallation Neutron Source (SNS) Ring.

The Spallation Neutron Source accumulator ring is described. Also described are the challenging accelerator physics problems associated with space charge issues, injection, extraction, and beam loss.

... SOURCES), PARTICLE ACCELERATOR TARGETS, NEUTRON FLUX, MEASUREMENT, RADIOACTIVE ISOTOPES, STABLE ISOTOPES, GOLD. ...

The Spallation Neutron Source Accumulator ring is described. Also described are the challenging accelerator physics problems associated with space charge issues, injection, extraction, and beam loss.

The Spallation Neutron Source Accumulator ring is described. Also described are the challenging accelerator physics problems associated with space charge issues, injection, extraction, and beam loss.

�wire septa from circular machines for spallation neutron sources,'' Particle Accelerator Conference, Dallas Spallation Neutron Source,'' these proceedings. #12;

Alamos, NM, USA Abstract The architecture for Spallation Neutron Source accelerator physics application. The data synchronization progress is also presented. 1 INTRODUCTION The Spallation Neutron Source (SNS

The decommissioning of reactor-based neutron sources in the USA has led to the development of a new generation of neutron sources that employ high-energy accelerators. Among the accelerator-based neutron sources presently in ...

An ideal neutron beam for BNCT is a beam of epithermal neutrons, forward directed, and free of gamma rays and thermal and fast neutrons. Three neutron beams were evaluated, and compared: (1) the operating Brookhaven Medical Research Reactor (BMRR) epither...

The Rotating Target Neutron Source (RTNS-II) at Lawrence Livermore National Laboratory (LLNL) is an accelerator-driven fusion neutron source. Neutrons are produced by beaming deuterium into a tritium-loaded target. To increase the neutron yield, we ...

Thermal-neutron fluences in soil are reported for selected fast-neutron sources, selected soil types, and selected irradiation geometries. Sources include 14 MeV neutrons from accelerators, neutrons from spontaneously fissioning 252Cf, and ...

Pulsed spallation sources are reviewed in a historical content as the latest generation of neutron sources in a line that started with the discovery of the neutron in 1932 and proceeded through research-reactor and accelerator-driven sources. The characte...

PSN# TUAP055 PLANS FOR THE SPALLATION NEUTRON SOURCE INTEGRATED CONTROL SYSTEM NETWORK * W. R. De plus remote power reboot service. 1 INTRODUCTION The Spallation Neutron Source (SNS) is an accelerator

Radiation damage effects at accelerator-based spallation neutron sources correspond to a new regime, distinct from that encountered at fission reactors. We characterize the radiation environment of a spallation neutron source in some detail, and review th...

The efforts around the world to provide higher neutron intensities are now focussed on accelerator-driven spallation sources in which neutrons are produced by bombardment of heavy metal targets with high energy protons. Spallation sources can be pulsed or...

The technologies that are being utilized to design and build the target systems for a state-of-the-art accelerator-based neutron source, the Spallation Neutron Source (SNS), are discussed. Emphasis is given to the technology issues that present the greate...

The Rotating Target Neutron Source (RTNS-II) facility produces 14-MeV neutrons for materials damage studies. Initial operation for irradiations, which occurred in 1979, began with a neutron source strength of 10/sup 13/ n/s utilizing one of the accelerator-based ...

An accelerator-driven spallation neutron-source target/blanket system has been developed for the production of tritium. The system employs a proton linear accelerator, and a lead neutron-producing target, surrounded by tritium-producing blankets based on ...

The significant sources of photoneutrons within a linear-accelerator treatment head are identified and absolute estimates of neutron production per treatment dose are given for typical components. Measured data obtained at a variety of accelerator install...

A new high energy (1 < E < 10 MeV) neutron source based on existing pulsed Sandia accelerators operated in the ion mode is described. In addition to its application in weapons effects testing, this source could be used in studying transient annealing effects at high neutron energies and ...

The overall goal of this project was to develop an accelerator-based neutron source (ABNS) for Boron Neutron Capture Therapy (BNCT). Specifically, our goals were to design, and confirm by measurement, a target assembly and a moderator assembly that would fulfill the design requirements of the ABNS. These design ...

The China Spallation Neutron Source (CSNS) is an accelerator-based high-power project currently in preparation under the direction of the Chinese Academy of Sciences (CAS). The complex is based on an H-linear accelerator, a rapid cycling proton synchrotro...

The photon response of silicon diode neutron detectors was studied to solve the problem on detecting neutrons in the presence of high energy photons at accelerator neutron sources. For the experiment Si diodes, Si discs, and moderated activation foil dete...

Neutron cross sections are being developed for a variety of fusion-related applications including neutron dosimetry, fusion plasma diagnostics, the activation of very long-lived isotopes, and high-energy accelerator neutron sources.

A unique benchmark neutron field has been established at the Lawrence Livermore National Laboratory (LLNL) to study deep penetration neutron transport. At LLNL, a tandem accelerator is used to generate a monoenergetic neutron source that permits investiga...

May 6, 2011... system for the Spallation Neutron Source, an accelerator-based neutron ... X -ray diffraction is a complex process which requires several ...

for neutron capture therapy is under construction now at the Budker Institute of Nuclear Physics, NovosibirskAccelerator based neutron source for neutron capture therapy B. Bayanov, Yu. Belchenko, V. Belov, V Physics, Novosibirsk, Russia The Budker Institute of Nuclear Physics (Novosibirsk) and ...

The various neutron sources in the solar system are discussed. Because of the neutrons' half life, very few neutrons come into the solar system from outside. Cosmic rays interacting with the atmosphere or surface of the planets are the major neutron source ...

This report discusses the following topics: A Next-Generation Spallation-Neutron Source; Accelerator Performance Demonstration Facility; APEX Free-Electron Laser Project; The Ground Test Accelerator (GTA) Program; Intense Neutron Source for Materials Testing; Linac Physics ...

Several accelerator-based neutron capture therapy applications are under development. These applications include boron neutron capture therapy for glioblastoma multiform and boron neutron capture synovectomy (BNCS) for rheumatoid arthritis. These modalities use accelerator-based ...

Authors explored the direct replacement of Am-Be neutron sources in neutron porosity logging tools through Monte Carlo simulations using MCNP5. (252)Cf and electronic accelerator neutron sources based on the Deuterium-Tritium fusion reaction were considered. Between the ...

A compact neutron generator for the production of 14 MeV neutrons and 10 exp 10 neutron/s yield is described. A laser ion source is used for production of deuterons. Deuterons are accelerated to 130 MeV in microsecond pulses with a frequency of 25 Hz. The...

This chapter provides a brief survey of the types of neutron sources that are available for imaging applications, primarily focusing on high-flux sources such as reactors or spallation sources but also including smaller or portable sources based on radioactive decay or small ...

High intensity Accelerator is being studied all over world for numerous applications, which includes the waste transmutation, spallation neutron source and material irradiation facilities. The R/D activities of the technology of High intensity accelerator are also developed in China for some year, and have some ...

A modeling investigation was performed to choose moderator material and size for creating optimal epithermal neutron beams for BNCT based on a proton accelerator and the 7Li(p,n)7Be reaction as a neutrons source. An optimal configuration is suggested for the beam shaping assembly made from polytetrafluoroethylene ...

The development of new neutron sources for BNCT applications, based on particle accelerators is currently underway all over the world. Though nuclear reactors were used for a long time as the only neutron source available having the requested flux levels, the ...

The efforts around the world to provide higher neutron intensities are now focussed on accelerator-driven spallation sources in which neutrons are produced by bombardment of heavy metal targets with high energy protons. Spallation sources can be pulsed or quasi-continuous depending on the ...

A well logging apparatus is described which includes an accelerator-type neutron source and means for cyclically operating the source and the associated apparatus. (R.J.S.)

The China Spallation Neutron Source (CSNS) is an accelerator based high power project currently under preparation in China. The accelerator complex is based on an H{sup -} linear accelerator and a rapid cycling proton synchrotron. During the past year, the design of most ...

We describe Monte Carlo simulations of three facilities for the production of epithermal neutrons for Boron Neutron Capture Therapy (BNCT) and examine general aspects and problems of designing the spectrum-shaping assemblies to be used with these neutron sources. The first facility is based on an ...

The accelerator tubes are essential components of the accelerator. Their function is to transport and accelerate a very intense proton or deuteron beam through the machine, from the ion source to the neutron production target, without significant losses. In this contribution, we discuss ...

The National Spallation Neutron Source is a collaborative project or perform the conceptual design for a next generation neutron source for the Department of Energy. This paper reviews the need and justification for a new neutron source, the origins and structure of the ...

A brief description is given of a calculational model developed to simulate a T(D,n)/sup 4/ He neutron source which is anisotropic in energy and intensity. The model also provides a means for including the time dependency of the neutron source. Although the model has been applied specifically to the Lawrence ...

synchrotrons, compact proton linacs for PET isotope production, epithermal neutron sources for the BNCT (PET and SPECT), the production of epithermal neutron beams for BNCT, and accelerated proton beams for the PET application, and neutron production for the BNCT application. These systems, ...

This report describes space-resolved measurements of neutrons and of accelerated charged particles, emitted by a plasmafocus-device. The neutron source has been measured with one and two-dimensional paraffin collimators. The space resolution is 5 mm along...

Japan Atomic Energy Research Institute (JAERI) is developing the world's strongest spallation neutron source using high power proton accelerator and promoting a neutron science project for comprehensive studies on basic science and nuclear transmutation o...

Activation analysis was applied to the study of coi033406s using 14-MeV neutrons produced by an accelerator for the determination of oxygen and neutrons emitted from a exp 252 Cf source for the determination of the other elements (Au, Ag, Cu, As etc...). ...

Fast-neutron interrogation techniques are being investigated for detection of narcotics in luggage and cargo containers. This paper discusses two different fast-neutron techniques. The first uses a pulsed accelerator or sealed-tube source to produce monoe...

A neutron source is described. Ions of D and T are produced by heating a Zr helix. These ions are accelerated toward a gold foil in which D and T have been adsorbed. The resulting D-D and D-T colllsions produce neutrons. (T.R.H.)

Fast Neutron Transmission Spectroscopy (FNTS) is being investigated for detecting explosives in luggage and other small containers. It uses an accelerator to generate nanosecond-pulsed neutron beams that strike a target, producing a white source of neutro...

The preliminary design of an accelerator suitable to meet the flux and neutron energy requirements of a CTR materials test facility is presented. The specifications of such a facility call for a neutron flux of 10 exp 14 n/cm exp 2 -sec distributed over a...

A 2.5 MeV neutron source has been established on the beamline of a 100 kV, 0.5 ma ion accelerator. The ion accelerator provides a 100 kV deuteron beam of about 200 mu a into a 3 mm beam spot at the target position. The neutron source is produced by the D(...

The performance of the Intense Pulsed Neutron Source (IPNS) Accelerator System is reported, including an increase in average beam current to 13.4 microamperes and increased reliability to 93.2%. Brief discussions are given for the performance of the major accelerator subsystems, including the H/sup -/ ion ...

Boron Neutron Capture Therapy (BNCT) is being studied as a possible radiotherapic treatment for some cancer types. Neutron energy for penetrating into tissue should be in the epithermal range. Different methods are used for neutron production. Electron accelerators are an alternative way for producing ...

The PNS project is devoted to the design and simulation of a Photo-Neutron Source for BNCT using a Varian 2300C/D electron accelerator. This paper describes the production of the high-energy gamma-rays followed by neutron production in (gamma,n) reaction. To optimize the whole setup and maximize the ...

There were three objectives to this project: (1) The development of the 2-D Swan code for the optimization of the nuclear design of facilities for medical applications of radiation, radiation shields, blankets of accelerator-driven systems, fusion facilities, etc. (2) Identification of the maximum beam quality that can be obtained for Boron Neutron Capture ...

There were three objectives to this project: (1) The development of the 2-D Swan code for the optimization of the nuclear design of facilities for medical applications of radiation, radiation shields, blankets of accelerator-driven systems, fusion facilities, etc. (2) Identification of the maximum beam quality that can be obtained for Boron Neutron Capture ...

The concept of a subcritical system driven by an external source of neutrons provided by an accelerator ADS (Accelerator Driver System) has been recently revived and is becoming more popular in the world technical community with active programs in Europe,...

The Accelerator Production of Tritium (APT) concept proposes the production of tritium by means of an accelerator and target system. The Los Alamos APT design incorporates a high-energy, high-current proton accelerator, a tungsten neutron source, a lead n...

This report contains viewgraph material on the following topics: Electron-Positron Linear Colliders; Unconventional Colliders; Prospects for UVFEL; Accelerator Based Intense Spallation; Neutron Sources; and B Physics at Hadron Accelerators with RHIC as an Example.

The Accelerator Production of Tritium (APT) project will employ a high power proton accelerator to generate neutrons in a spallation target for the production of tritium. This paper will describe major attributes of the safety of this facility. 1 fig.

The Los Alamos Accelerator Transmutation of Nuclear Waste (ATW) concept uses an accelerator driven neutron source (target) surrounded by a moderator and multiplying medium (blanket) for the transmutation of actinide and fission product waste. The referenc...

Accelerator-based neutron sources offer many advantages, in particular tunability of the neutron beam in energy and width to match the needs of the application. Using a recently constructed neutron beam line at the 88-Inch Cyclotron at LBNL, tunable high-intensity sources ...

A bibliographic study is being made on transportable particle accelerators used as neution sources. In the first report of this bibliographic stucly, the applications of such accelerators to qualitative and quantitative analysis are considered. As an introduction, the interactions of neutrons with matter ...

For the cooling system of a stationary target for the fusion neutronics source (FNS), designed to meet the structural, thermal and hydraulic requirements, thermohydraulic experiments were made. In the heat transfer experiment, in place of an accelerator, ...

To fulfill the need for intense 14-MeV neutron sources for controlled thermonuclear reactor material damage studies, several accelerators will be built at the Lawrence Livermore Laboratory. A high-capacity vacuum system will be required to handle the larg...

For the Thermophysical analysis of the Accelerator Driven Systems (ADS) an simplified model of ADS core was used. The neutron flux was calculated by means of diffusion theory for subcritical homogeneous reactor with an external neutron source. From this result the distribution of the heat ...

flowing powder target. The same concept could be used for a Spallation Neutron Source target Spallation Neutron Source", Proc. of ICONE-12, Washington DC, USA, Paper 49518 [2] RB Palmer et al, 200 Nucl

This paper summarizes results of Spallation Neutron Source calculations to estimate radiation hazards and shielding requirements for activated Mercury, target components, target cooling water, and ⁷Be plateout. Dose rates in the accelerator tun...

The accelerator system for the 1 to 5 MW National Spallation Neutron Source (NSNS) consists of a linac followed by a 1 GeV proton accumulator ring. Since the ring is a very high current machine, the injection and rf capture of the protons is deeply affect...

Proton induction linacs are explored as high intensity neutron sources. The induction linac - concept, properties, experience with electrons, and possibilities - and its limitations for accelerating ions are reviewed. A number of proton induction linac de...

The lecture notes are divided into five parts. In part I neutron sources based on ( alpha ,n) and ( gamma ,n) reaction as well as on spontaneous fission and the use of accelerators are discussed. The source spectra are considered and the slowing-down of f...

Pellet fusion, driven by nanosecond pulses containing alpha particles with 200 MeV energy, is being developed as a neutron source. A prototype system is in the conceptual design stage. During the coming year, engineering design of required accelerator com...

Accelerator requirements for pulsed spallation neutron sources are stated. Brief descriptions of the Argonne IPNS-I, the Japanese KENS, Los Alamos Scientific Laboratory WNR/PSR, the Rutherford Laboratory SNS, and the West German SNQ facilities are presented.

The 2MW Spallation Neutron Source (SNS) will have a D.C. beam current of 40 A at extraction, making it one of the worlds most intense accelerators. Coherent instabilities are a major concern and efforts to predict beam behavior are described.

In accelerator-driven neutron sources such as the Spallation Neutron Source (SNS) with powers in the 2 MW range (time-averaged), the interaction of the energetic proton beam with the mercury target can lead to very high heating rates in the target. Althou...

We are here today to testify on the Department of Energy's (DOE) management of the Spallation Neutron Source Project (project). This billion- dollar complex, to be built in Oak Ridge, Tennessee, is designed to be the world's most powerful accelerator-base...

Radiation damage in target, container, and window materials for spallation neutron sources is am important factor in the design of target stations for accelerator-driver transmutation technologies. Calculations are described that use the LAHET and SPECTER...

The Spallation Neutron Source (SNS) is designed to ultimately reach an average proton beam power of 2 MW for pulsed neutron production. The SNS physics groups analyze the machine performance within the hardware constraints, optimize the accelerator design, and establish the best path towards a 2 MW and higher ...

The Spallation Neutron Source (SNS) is designed to ultimately reach an average proton beam power of 2 MW for pulsed neutron production. The SNS physics groups analyze the machine performance within the hardware constraints, optimize the accelerator design, and establish the best path towards a 2 MW and higher ...

The Intense Pulsed Neutron Source (IPNS) at Argonne National Laboratory is a spallation neutron source based on a 500-MeV proton accelerator operating at 30 Hz and with an average proton current of approx. 10 mu A. Neutron-scattering instruments for elast...

Results of measurements of the properties of a pulsed neutron source are presented. The source consists of a slightly sub-prompt-critical fast reactor of uranium metal (93% U-235) shpere struck by a pulsed 29 MeV electron beam from a linear accelerator. T...

Pulsed spallation sources are reviewed in a historical content as the latest generation of neutron sources in a line that started with the discovery of the neutron in 1932 and proceeded through research-reactor and accelerator-driven sources. The characteristics of the ...

A series of basic experiments for an accelerator driven subcritical reactor (ADSR) has been performed at the Kyoto University Critical Assembly (KUCA) by combining a critical assembly with a Cockcroft-Walton type accelerator in view of a future plan to establish a new neutron source for research. By injecting 14 ...

A modeling investigation was performed to choose moderator material and size for creating optimal epithermal neutron beams for BNCT based on a proton accelerator and the (7)Li(p,n)(7)Be reaction as a neutrons source. An optimal configuration is suggested for the beam shaping assembly made from ...

As a graduate research in the Faculty of Science, Kyoto University, we are developing a miniature neutron source and conducting experiments with neutrons produced. Compared with X-rays, neutrons haven't been very widely used for material science until now. It is because there are few facilities for experiments, for ...

Proton induction linacs are explored as high intensity neutron sources. The induction linac - concept, properties, experience with electrons, and possibilities - and its limitations for accelerating ions are reviewed. A number of proton induction linac designs are examined with the LIACEP program and general conclusions are given. ...

We present the results of a literature search into the present state-of-the-art techniques in producing, moderating, collimating, and imaging thermal neutrons, with an emphasis on radiographic diagnosis. The portable linear accelerator source we describe compares favorably with commercially available laboratory facilities for ...

The detection of nuclear materials such as highly enriched uranium has become increasingly important. The University of Missouri is developing a compact accelerator system for active neutron interrogation using a piezoelectric transformer with an ion diode for neutron production. The piezoelectric high voltage generator is composed of ...

The VESUVIO beam line at the ISIS spallation neutron source was set up for neutron irradiation tests in the neutron energy range above 10 MeV. The neutron flux and energy spectrum were shown, in benchmark activation measurements, to provide a neutron spectrum similar to the ...

The VESUVIO beam line at the ISIS spallation neutron source was set up for neutron irradiation tests in the neutron energy range above 10 MeV. The neutron flux and energy spectrum were shown, in benchmark activation measurements, to provide a neutron spectrum similar to the ...

Hybrid circuits have been widely used for space and military applications. As a result, there is a requirement for determining how these circuits tolerate nuclear radiation. The paper compares reactor generated neutrons with accelerator generated neutrons for testing neutron tolerance of hybrid circuits. The paper ...

A pseudo-line source has been realized by using an accelerator based D-T point neutron source. The pseudo-line source is obtained by time averaging of continuously moving point source or by superposition of finely distributed point sources. The line ...

A study of pulsed spallation neutron source, that could deliver fluxes in excess of 1 /times/ 10/sup 17/ N/cm/sup 2/-sec began at Argonne in 1981. A review of various accelerator concepts to act as an intense charged particle source to generate spallation neutrons resulted in the selection of a ...

The Intense Pulsed Neutron Source (IPNS) accelerator system has managed a 40% increase in time average beam current over the last two years. Currents of up to 15.6 mu A (3.25 x 10 exp 12 protons at 30 Hz) have been successfully accelerated and cleanly ext...

Radiation damage in target, container, and window materials for spallation neutron sources is am important factor in the design of target stations for accelerator-driver transmutation technologies. Calculations are described that use the LAHET and SPECTER codes to obtain displacement and helium production rates in tungsten, 316 ...

The three levels of thermal neutron sources are introduced - University laboratory sources infrastructure sources and world-class sources - and the needs for each kind and their inter-dependence will be emphasized. A description of the possibilities for University sources ...

The three levels of thermal neutron sources are introduced - University laboratory sources infrastructure sources and world-class sources - and the needs for each kind and their inter-dependence will be emphasized. A description of the possibilities for University sources ...

The three levels of thermal neutron sources are introduced - University laboratory sources, infrastructure sources and world-class sources - and the needs for each kind and their inter-dependence will be emphasized. A description of the possibilities for University sources ...

The fast neutron fluxes diffused around the proton synchrotron Saturne of Saclay and the average energy of neutrons were measured at distances from 25 to 700 m from accelerator's center. Experimental results are in very good agreement with diffusion theory of neutrons in and infinite medium in which ...

The Intense Pulsed Neutron Source (IPNS) accelerator system consists of a 750 keV Cockcroft-Walton preaccelerator, 50 MeV linear accelerator and a 500 MeV Rapid Cycling Synchrotron (RCS). The accelerator system accelerates over 2.5 x 10/sup 12/ protons per pulse at a 30 Hz ...

A portable neutron source that can be switched on and off or pulsed at a controllable rate could have a number of uses; as a timely example, it could provide the neutron beam for an (n,..gamma..) interrogator to check luggage for explosives at airports. Other applications include thermal neutron activation and ...

PhoNeS (Photo Neutron Source) is an INFN project devoted to the optimization of the neutron production and moderation in radiotherapy linear accelerators. LinAcs producing high energy (15 25 MeV) photon beams are becoming widespread. At this energy neutron photo-production is unavoidable and ...

Accelerator-driven systems for fissile materials production have been proposed and studied since the early 1950s. Recent advances in beam power levels for small accelerators have raised the possibility that such use could be feasible for a potential proliferator. The objective of this study is to review the state of technology development for ...

This paper describes considerations for selection of structural and target materials for accelerator-driven neutron sources. Due to the operating constraints of proposed accelerator-driven neutron sources, the criteria for selection are different than those commonly applied ...

This paper describes considerations for selection of structural and target materials for accelerator-driven neutron sources. Due to the operating constraints of proposed accelerator-driven neutron sources, the criteria for selection are different than those commonly applied ...

This paper describes considerations for selection of structural and target materials for accelerator-driven neutron sources. Due to the operating constraints of proposed accelerator-driven neutron sources, the criteria for selection are different than those commonly applied ...

Neutrons can be produced with low-energy ion accelerators for many applications, such as the characterisation of neutron detectors, the irradiation of biological samples and the study of the radiation damage in electronic devices. Moreover, accelerator-based neutron sources ...

Since 1986, the Idaho National Engineering Laboratory (INEL) has been involved in the development of epithermal neutron sources for BNCT. The INEL effort was instrumental in the implementation of an epithermal neutron beam at the Brookhaven Medical Research Reactor at Brookhaven National Laboratory. Recently, the INEL's effort has been ...

upstream linac (Berkeley, LANL and J-Lab) and the experimental area and target station (ANL and ORNL). Its prime purpose is to strip, accelerate and transport the particle beam...

... accelerator as the neutron source, and detecting the 10.8 ... a reaction from nitro- gen in the mine explosive, - in .-. ... ELTA, Ground Penetrating Radar. ...

Several of the instruments at the Intense Pulsed Neutron Source (IPNS) at Argonne use rotating Fermi choppers. The techniques used to control the speed and phase of these rotating devices are discussed.

... de Graaff, a 1-MW nuclear reactor, a 14-MeV neutron source, and a ... CYCLOTRONS, VAN DE GRAAFF GENERATORS, LINEAR ACCELERATORS ...

Particle accelerators are important tools for materials research and production. Advances in high-intensity linear accelerator technology make it possible to consider enhanced neutron sources for fusion material studies or as a source of spallation neutrons. Energy ...

... National Laboratory in Oak Ridge, TN where he conducted research on charged particle accelerator systems at the Spallation Neutron Source. ...

The main components of new neutron time-of-flight spectrometer are described: neutron sources based on the solid tritium and metallic lithium targets, main neutron detector, monitor detectors and system for absolute measurement of neutron flux intensity. ...

We present a conceptual design of a low-energy neutron generator for treatment of brain tumors by boron neutron capture theory (BNCT). The concept is based on a 2.5-MeV proton beam from a radio-frequency quadrupole (RFQ) linac, and the neutrons are produc...

Monte Carlo modelling of an irradiation facility, for boron neutron capture therapy (BNCT) application, using a set of advanced type, accelerator based, 3H(d,n)4He (D-T) fusion neutron source device is presented. Some general issues concerning the design of a proper irradiation beam shaping assembly, based on very ...

The Los Alamos Neutron Science Center (LANSCE) accelerator and beam delivery complex generates the proton beams that serve three neutron production sources; the thermal and cold source for the Manuel Lujan Jr. Neutron Scattering Center, the Weapons ...

At Budker Institute of Nuclear Physics, epithermal neutron source for neutron-capture therapy was built and neutron generation was realized. Source is based on tandem accelerator and uses near-threshold neutron generation from the reaction ...

The Intense Pulsed Neutron Source (IPNS) facility has now been operating in a routine way for outside users since November 1, 1981. From that date through December of 1982, the accelerator system was scheduled for neutron science for 4500 hours. During this time the accelerator achieved its ...

The Intense Pulsed Neutron Source (IPNS) facility has now been operating in a routine way for outside users since November 1, 1981. From that date through December of 1982, the accelerator system was scheduled for neutron science for 4500 hours. During this time the accelerator achieved its ...

Small accelerator neutron sources offer considerable potential for applied neutron radiography applications. Among the desirable features are relatively low costs, limited operating hazards, opportunities for tailoring primary neutron spectra, compactness and portability, and modest licensing ...

Small accelerator neutron sources offer considerable potential for applied neutron radiography applications. Among the desirable features are relatively low costs, limited operating hazards, opportunities for tailoring primary neutron spectra, compactness and portability, and modest licensing ...

Small accelerator neutron sources offer considerable potential for applied neutron radiography applications. Among the desirable features are relatively low costs, limited operating hazards, opportunities for tailoring primary neutron spectra, compactness and portability, and modest licensing ...

A world-class accelerator driven short pulsed neutron source is in the final stages of construction at the Oak Ridge National Laboratory. A 1.4 MW proton beam at 1 GeV energy directed on a mercury target will free neutrons through spallation reactions that will be moderated to thermal and subthermal energies and ...

The China Spallation Neutron Source (CSNS) is an accelerator-based facility. The accelerator of CSNS consists of a low energy linac, a Rapid Cycling Synchrotron (RCS) and two beam transport lines. The overall physics design of CSNS accelerator is described, including the design principle, the ...

The neutron yields from the thick targets of uranium, bismuth, mercury, and lead in a 15-Mev electron linear accelerator were investigated in the energy range 7.5 -- 13 Mev. Neutrons were detected with a BF/sub 3/ counter surrounded by a special shielding arrangement to reduce the effect of x rays and background ...

Until the last decade, most neutron experiments have been performed at steady-state, reactor-based sources. Recently, however, pulsed spallation sources have been shown to be very useful in a wide range of neutron studies. A major review of neutron sources in the US was ...

Using a high intensity, femtosecond laser driven neutron source, a high-sensitivity neutron detector was calibrated. This detector is designed for observing fusion neutrons at the Z accelerator in Sandia National Laboratories. Nuclear fusion from laser driven deuterium cluster explosions was ...

... ACCELERATORS, NEUTRON FLUX), NEUTRON ... REACTIONS, REACTOR CORES, ELECTRON ... ELECTRON IRRADIATION, MEASUREMENT. ...

High intensity proton accelerators have two important applications in China in recent years: Accelerator Driven Sub-critical System for nuclear waste transmutation and China Spallation Neutron Source. This paper focuses on the R&D activities of the key technology of high intensity proton ...

A neutron source with a better yield over a longer period of time is described. A tube in which T and D ions are accelerated at a Au-plated target with T and D adsorbed on it is described. The T and D ions come from heating a Zr helix on which T and D are adsorbed. (T.R.H.)

Boron neutron capture therapy is an experimental binary cancer radiotherapy modality in which a boronated pharmaceutical that preferentially accumulates in malignant tissue is first administered, followed by exposing the tissue in the treatment volume to ...

Neutron-flux and energy-spectrum measurements are conducted for all major fusion-materials irradiation facilities, including fission reactors and accelerators. Dosimetry-characterization experiments and integral cross section measurements have been perfor...

The technologies that are being utilized to design and build the target systems for a state-of-the-art accelerator- based neutron source, the Spallation Neutron Source (SNS), are discussed. Emphasis is given to the technology issues that present the greatest challenges. The present ...

At first glance the story of the Intense Pulsed Neutron Source (IPNS) at Argonne National Laboratory (ANL) appears to have followed a puzzling course. When researchers first proposed their ideas for an accelerator-driven neutron source for exploring the s...

The conceptual engineering design and expected performance for a 14 MeV DT neutron source is detailed. The source would provide an intense neutron flux for accelerated testing of fusion reactor materials. The 150-keV neutral beams inject energetic deuteri...

facility (in 7 years) -- ESS�I Eur. spallation neutron source for n�spectroscopy -- Eur. XFEL hard X of spallation neutron sources, transmutation of nuclear waste in accelerator driven systems [21], and shielding, Oct.17�22nd, Tsukuba, Japan (1999) 8. Spallation ...

For several years, research has been ongoing in the Ohio State University (OSU) Nuclear Engineering Program toward the development of an accelerator-based irradiation facility (ANIF) neutron source for boron neutron capture therapy (BNCT). The ANIF, which is planned to be built in a hospital, has been conceptually ...

The decommissioning of reactor-based neutron sources in the USA has led to the development of a new generation of neutron sources that employ high-energy accelerators. Among the accelerator-based neutron sources presently in ...

New calculations of the skyshine dose distribution of neutrons and secondary photons have been performed at Jefferson Lab using the Monte Carlo method. The dose dependence on neutron energy, distance to the neutron source, polar angle of a source neutron, and azimuthal ...

The physics of photon and neutron active interrogation of highly enriched uranium (HEU) using the delayed neutron reinterrogation method is described in this paper. Two sets of active interrogation experiments were performed using a set of subcritical configurations of cocentric HEU metal hemishells. One set of measurements utilized a pulsed 14-MeV ...

The physics of photon and neutron active interrogation of highly enriched uranium (HEU) using the delayed neutron reinterrogation method is described in this paper. Two sets of active interrogation experiments were performed using a set of subcritical configurations of concentric HEU metal hemishells. One set of measurements utilized a pulsed 14-MeV ...

The physics of photon and neutron active interrogation of highly enriched uranium (HEU) using the delayed neutron reinterrogation method is described in this paper. Two sets of active interrogation experiments were performed using a set of subcritical configurations of concentric HEU metal hemishells. One set of measurements utilized a pulsed 14-MeV ...

This is the final report of a one-year, Laboratory-Directed Research and Development (LDRD) at the Los Alamos National Laboratory (LANL). The development of next generation, accelerator based neutron sources calls for the design of new instruments for neutron scattering studies of materials. It will be necessary, ...

In the PIAFE project, the uranium source will be exposed to the high neutron flux of the ILL reactor. Fission products will be ionized and accelerated at energies up to 30 keV for further mass selection. A description of the source and the tests on the rhenium container are given.

The Accelerator Production of Tritium (APT) concept proposes the production of tritium by means of an accelerator and target system. The Los Alamos APT design incorporates a high-energy, high-current proton accelerator, a tungsten neutron source, a lead neutron multiplier, ...

The Accelerator Production of Tritium (APT) concept proposes the production of tritium by means of an accelerator and target system. The Los Alamos APT design incorporates a high-energy, high-current proton accelerator, a tungsten neutron source, a lead neutron multiplier, ...

This paper presents applications of high power RF proton linear accelerators to several fields. Radioisotope production is an area in which linacs have already provided new isotopes for use in medical and industrial applications. A new type of spallation neutron source, called a long-pulse spallation source (LPSS), ...

Neutron-scattering research has a lot to do with our everyday lives. Things like medicine, food, electronics, cars and airplanes have all been improved by neutron-scattering research. Neutron research also helps scientists improve materials used in a multitude of different products, such as high-temperature superconductors, powerful ...

Innovative facility for neutron capture therapy has been built at BINP. This facility is based on compact vacuum insulation tandem accelerator designed to produce proton current up to 10mA. Epithermal neutrons are proposed to be generated by 1.915-2.5MeV protons bombarding a lithium target using (7)Li(p,n)(7)Be threshold reaction. In ...

Pilot innovative facility for neutron capture therapy was built at Budker Institute of Nuclear Physics, Novosibirsk. This facility is based on a compact vacuum insulation tandem accelerator designed to produce proton current up to 10 mA. Epithermal neutrons are proposed to be generated by 1.915 MeV protons bombarding a lithium target ...

A proton linac plus synchrotron system was studied for the proposed Intense Pulsed Neutron Source (IPNS) at Argonne. An Alvarez H$sup -$ linac of 70 MeV and a high intensity fast cycling proton synchrotron to accelerate protons to 800 MeV will be the best choice to give a flux of 10$sup 16$ thermal ...

The aim of the Radiological Research Accelerator Facility (RARAF) was to provide a source of monoenergetic neutrons for studies in radiation biology, dosimetry and microdosimetry. The research has provided insight into the biological action of radiation a...

Accelerator-Driven Transmutation Technology, or ADT(sup 2), is a collection of programs that share a common theme - they each have at their heart an intense source of neutrons generated by a high-energy proton beam striking a heavy metal target. The beam ...

There is renewed interest in using accelerator driven neutron sources to address the problem of high-level long-lived nuclear waste. Several laboratories have developed systems that may have a significant impact on the future use of nuclear power, adding ...

Medium energy nuclear data in the 1--1000 MeV range is necessary to accelerator applications which include spallation neutron sources for radioactive waste treatment and accelerator shielding design, medical applications which include isotopes production ...

A preliminary assessment is presented of the potential for utilizing existing accelerator Be-target systems in the CTR Materials Program. The considerations are aimed to partially satisfy the programmatic near-term phase of the technology program. (auth)

Researchers at Los Alamos National Laboratory are considering the possibility of using the Low Energy Demonstration Accelerator (LEDA), constructed at LANSCE for the Accelerator Production of Tritium program (APT), as a neutron source. Evaluated nuclear d...

The electrostatic accelerator of the Physics Institute of the University of Milan is described. This instrument was designed to be used as a 14 Mev neutron source by means of the reaction D + T = alpha + n + 17.587 Mev. A total flux of 5 x 10/sup 9/ neutrons/sec can be obtained, with the ...

In the FLNP, JINR there is a new Intense Resonance Neutron source (IREN) being under construction. It consists of the electron linear accelerator LUE-200 and the neutron fission core. For the experimental test of the project parameters and the accelerator...