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Multipurpose Radiation Resistant Semiconductor Detectors for Alpha, Neutron & Low Energy Gamma Ray Measurements at High Temperatures in High-Intensity Gamma Ray

Description: Work scheduled under year two of DOE Grant DE-FG02-04ER63734 is on schedule and all year-two milestones have or will be met. Results to date demonstrate that unprecedented silicon carbide (SiC) energy resolution has been obtained, and that SiC detectors may achieve energy resolution that exceeds that obtainable with the best silicon alpha spectrometers. Fast-neutron energy spectrometry measurements indicate that recoil-ion energy spectrometry should be possible with SiC detectors. Furthermore, … more
Date: June 1, 2005
Creator: Ruddy, Frank H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Rotating Aperture Deuterium Gas Cell Development for High Brightness Neutron Production

Description: Work is underway at LLNL to design and build a high-brightness mono-energetic source for fast neutron imaging. The approach being pursued will use a 7-MeV deuterium linac for producing high-energy neutrons via a D(d,n){sup 3}He reaction. To achieve a high-brightness neutron source, a windowless rotating aperture gas cell approach is being employed. Using a series of close-tolerance rotor and stator plates, a differential pumping assembly was designed and built that contains up to 3 atmospheres … more
Date: May 2, 2005
Creator: Rusnak, B.; Hall, J. M. & Shen, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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FEASIBILITY OF MEASURING IRON IN VIVO USING FAST 14 MEV NEUTRONS.

Description: In this short report, I reassess the feasibility of measuring iron in vivo in the liver and heart of thalassemia patients undergoing chelation therapy. Despite the multiplicity of analytical methods for analyzing iron, only two, magnetic resonance imaging, and magnetic susceptibility, are suitable for in vivo applications, and these are limited to the liver because of the heart's beat. Previously, a nuclear method, gamma-resonance scattering, offered a quantitative measure of iron in these orga… more
Date: May 1, 2005
Creator: WIELOPOLSKI, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Methods and Instruments for Fast Neutron Detection

Description: Pacific Northwest National Laboratory evaluated the performance of a large-area (~0.7 m2) plastic scintillator time-of-flight (TOF) sensor for direct detection of fast neutrons. This type of sensor is a readily area-scalable technology that provides broad-area geometrical coverage at a reasonably low cost. It can yield intrinsic detection efficiencies that compare favorably with moderator-based detection methods. The timing resolution achievable should permit substantially more precise time win… more
Date: May 1, 2005
Creator: Jordan, David V.; Reeder, Paul L.; Cooper, Matthew W.; McCormick, Kathleen R.; Peurrung, Anthony J. & Warren, Glen A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Updated Generation IV Reactors Integrated Materials Technology Program Plan, Revision 2

Description: The Department of Energy's (DOE's) Generation IV Nuclear Energy Systems Program will address the research and development (R&D) necessary to support next-generation nuclear energy systems. Such R&D will be guided by the technology roadmap developed for the Generation IV International Forum (GIF) over two years with the participation of over 100 experts from the GIF countries. The roadmap evaluated over 100 future systems proposed by researchers around the world. The scope of the R&D… more
Date: December 1, 2005
Creator: Corwin, William R.; Burchell, Timothy D.; Halsey, William; Hayner, George; Katoh, Yutai; Klett, James William et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Steel-SiC Metal Matrix Composite Development

Description: The goal of this project is to develop a method for fabricating SiC-reinforced high-strength steel. We are developing a metal-matrix composite (MMC) in which SiC fibers are be embedded within a metal matrix of steel, with adequate interfacial bonding to deliver the full benefit of the tensile strength of the SiC fibers in the composite.
Date: July 17, 2005
Creator: Smith, Don D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fast Neutron Damage Studies on NdFeB Materials

Description: Many materials and electronics need to be tested for the radiation environment expected at linear colliders (LC) since both accelerator and detectors will be subjected to large fluences of hadrons, leptons and {gamma}'s over the life of the facility [1]. While the linacs will be superconducting, there are still many uses for NdFeB in the damping rings, injection and extraction lines and final focus. Our understanding of the situation for rare earth, permanent magnet materials was presented at P… more
Date: May 17, 2005
Creator: Anderson, S.; Spencer, J.; Wolf, Z.; /SLAC; Baldwin, A.; Pellett, D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Assessment of High-Temperature Measurements for Use in the Gas Test Loop

Description: Temperature transducers capable of control and test measurements in the 1400-1800¢ªC range in the fast neutron irradiation environment of the Gas Test Loop are evaluated. Among the instruments discussed are high-temperature thermocouples, resistance temperature detectors, ultrasonic thermometers, noise thermometers, and optical temperature sensors. High-temperature capability, behavior under irradiation, technical maturity, cost, and availability are among the key factors considered in assessin… more
Date: May 1, 2005
Creator: Wilkins, S. Curt & Evans, Robert P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Generation of Femtosecond Electron Pulses

Description: At the Fast Neutron Research Facility (FNRF), Chiang Mai University (Thailand), the SURIYA project has been established aiming to produce femtosecond electron pulses utilizing a combination of an S-band thermionic rf gun and a magnetic bunch compressor ({alpha}-magnet). A specially designed rf-gun has been constructed to obtain optimum beam characteristics for the best bunch compression. Simulation results show that bunch lengths as short as about 50 fs rms can be expected at the experimental s… more
Date: May 9, 2005
Creator: Jinamoon, V.; Kusoljariyakul, K.; Rimjaem, S.; Saisut, J.; Thongbai, C.; Vilaithong, T. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Design of a Gas Test Loop Facility for the Advanced Test Reactor

Description: The Office of Nuclear Energy within the U.S. Department of Energy (DOE-NE) has identified the need for irradiation testing of nuclear fuels and materials, primarily in support of the Generation IV (Gen-IV) and Advanced Fuel Cycle Initiative (AFCI) programs. These fuel development programs require a unique environment to test and qualify potential reactor fuel forms. This environment should combine a high fast neutron flux with a hard neutron spectrum and high irradiation temperature. An effort … more
Date: September 1, 2005
Creator: Wemple, C. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Compact Neutron Generators for Medical Home Land Security andPlanetary Exploration

Description: The Plasma and Ion Source Technology Group at Lawrence Berkeley National Laboratory has developed various types of advanced D-D (neutron energy 2.5 MeV), D-T (14 MeV) and T-T (0-9 MeV) neutron generators for wide range of applications. These applications include medical (Boron Neutron Capture Therapy), homeland security (Prompt Gamma Activation Analysis, Fast Neutron Activation Analysis and Pulsed Fast Neutron Transmission Spectroscopy) and planetary exploration with a sub-surface material char… more
Date: May 11, 2005
Creator: Reijonen, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The Challenges Associated with High Burnup and High Temperature for UO2 TRISO-Coated Particle Fuel

Description: The fuel service conditions for the DOE Next Generation Nuclear Plant (NGNP) will be challenging. All major fuel related design parameters (burnup, temperature, fast neutron fluence, power density, particle packing fraction) exceed the values that were qualified in the successful German UO2 TRISO-coated particle fuel development program in the 1980s. While TRISO-coated particle fuel has been irradiated at NGNP relevant levels for two or three of the design parameters, no data exist for TRISO-co… more
Date: February 1, 2005
Creator: Petti, David & Maki, John
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Designing a Gas Test Loop for the Advanced Test Reactor

Description: The Generation IV Reactor Program and the Advanced Fuel Cycle Initiative are investigating some new reactor concepts which require extensive materials and fuels testing in a fast neutron spectrum. The capability to test materials and fuels in a fast neutron flux in the United States is very limited to non-existent. It has been proposed to install a gas test loop (GTL) in one of the lobes of the Advanced Test Reactor (ATR) at the Idaho National Laboratory and harden the spectrum to provide some … more
Date: November 1, 2005
Creator: Parry, James R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Advanced Fuel Cycle Initiative AFC-1D, AFC-1G and AFC-1H Irradiation Report

Description: The U. S. Advanced Fuel Cycle Initiative (AFCI) seeks to develop and demonstrate the technologies needed to transmute the long-lived transuranic actinide isotopes contained in spent nuclear fuel into shorter-lived fission products, thereby dramatically decreasing the volume of material requiring disposition and the long-term radiotoxity and heat load of high-level waste sent to a geologic repository. The AFC-1 irradiation experiments on transmutation fuels are expected to provide irradiation pe… more
Date: September 1, 2005
Creator: Utterbeck, Debra J. & Chang, Gray
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fast neutrons incident on rotors : - tantalum.

Description: Reports in the Argonne National Laboratory Nuclear Data and Measurement Series present results of studies in the field of microscopic nuclear data. The primary objective of the series is the dissemination of information in the comprehensive form required for nuclear technology applications. This series is devoted to: (a) measured microscopic nuclear parameters, (b) experimental techniques and facilities employed in measurements, (c) the analysis, correlation and interpretation of nuclear data, … more
Date: March 21, 2005
Creator: Smith, A. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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{sup 48}Ti(n,xnpa{gamma}) reaction cross sections using spallation neutrons for E{sub n} = 1 to 20 MeV

Description: {gamma}-ray excitation functions have been measured for the interaction of fast neutrons with {sup 48}Ti (neutron energy from 1 MeV to 250 MeV). The Los Alamos National Laboratory spallation neutron source, at the LANSCE/WNR facility, provided a ''white'' neutron beam which is produced by bombarding a natural W target with a pulsed proton beam. The prompt-reaction {gamma} rays were measured with the large-scale Compton-suppressed Ge spectrometer, GEANIE. Neutron energies were determined by the … more
Date: January 6, 2005
Creator: Dashdorj, D.; Mitchell, G. E.; Garrett, P. E.; Agvaanluvsan, U.; Becker, J. A.; Bernstein, L. A. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An 8-Element Fast-Neutron Double-Scatter Directional Detector.

Description: We have constructed a fast-neutron double-scatter spectrometer that efficiently measures the neutron spectrum and direction of a spontaneous fission source. The device consists of two planes of organic scintillators, each having an area of 125 cm{sup 2}, efficiently coupled to photomultipliers. The four scintillators in the front plane are 2 cm thick, giving almost 25% probability of detecting an incident fission-spectrum neutron at 2 MeV by proton recoil and subsequent ionization. The back pla… more
Date: July 31, 2005
Creator: Vanier, P. E. & Forman, L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Neutron Resonance Radiography for Explosives Detection: Technical Challenges

Description: Fast Neutron Resonance Radiography (NRR) has recently become a focus of investigation as a supplement to conventional x-ray systems as a non-invasive, non-destructive means of detecting explosive material concealed in checked luggage or cargo containers at airports. Using fast (1-6 MeV) neutrons produced by the D(d,n){sup 3}He reaction, NRR provides both an imaging capability and the ability to determine the chemical composition of materials in baggage or cargo. Elemental discrimination is achi… more
Date: November 9, 2005
Creator: Raas, W L; Blackburn, B; Boyd, E; Hall, J M; Kohse, G; Lanza, R et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Design and Testing of a High Pressure Gas Target for Fast Neutron Resonance Radiography

Description: A high pressure deuterium gas target has been designed to provide high-flux fast neutrons using the D(d,n){sup 3}He reaction for use as a neutron source. The deuterium gas cell holds 4 atm D{sub 2} gas at 298K and is projected to tolerate a beam current of {approx}50 {micro}A of 3.0 MeV deuterons for 8 hours of continuous use. The high-pressure gas cell is designed to provide a fast neutron flux on the order of 10{sup 5} n/cm{sup 2}-s at one meter. Measurements of gamma ray production from deut… more
Date: November 9, 2005
Creator: Raas, W L; Blackburn, B; Boyd, E; Hall, J M; Kohse, G; Lanza, R et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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