28 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Energy Absorption"  
Results: 1 - 24 next
open access

Nuclear performance calculations for the ELMO Bumpy Torus Reactor (EBTR) reference design

Description: The nuclear performance of the ELMO Bumpy Torus Reactor reference design has been calculated using the one-dimensional discrete ordinates code ANISN and the latest available ENDF/B-IV transport cross-section data and nuclear response functions. The calculated results include estimates of the spatial and integral heating rate with emphasis on the recovery of fusion neutron energy in the blanket assembly and minimization of the energy deposition rates in the cryogenic magnet coil assemblies. The … more
Date: December 1, 1977
Creator: Santoro, R. T. & Barnes, J. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Particle fluxes and energy deposition in infinite homogeneous air due to protons of energy 1-, 5-, 10-, and 20-GeV

Description: Calculations have been carried out to determine the spatial dependence of the energy deposition and the spatial and energy dependence of particle fluxes in infinite homogeneous air without hydrogen due to protons of energy 5-, 10-, and 20-GeV. The fluxes are broken down into nine particle types. The energy deposition is divided among seven categories. The spatial dependence of the energy deposition is also presented for 1- and 10-GeV protons incident on infinite homogeneous air with hydrogen. T… more
Date: December 1, 1977
Creator: Gabriel, T. A.; Bishop, B. L.; Amburgey, J. D. & Barish, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

500-MeV electron beam bench-mark experiments and calculations

Description: Experiments measuring the energy deposited by electron beams were performed to provide bench marks against which to evaluate our HANDYL76 electron beam computer code. The experiments, done at Stanford's Mk III accelerator, measured dose vs depth and dose vs radius profiles induced in layered aluminum targets by 500-MeV electrons. The dose was measured by passive thermoluminescence and photographic film placed between aluminum plates. The calculations predict a dose vs radius profile that forwar… more
Date: December 1, 1979
Creator: Farley, E.; Crase, K. & Selway, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Adapting an x-ray/debris shield to the cascade ICF power plant: Neutronics issues

Description: A neutronics analysis has been carried out to determine the effects on the Cascade ICF reactor concept of adding a solid-lithium x-ray and debris shield to each ICF capsule. Results indicate that tritium breeding in LiAlO{sub 2} is possible with a modest isotopic enhancement in {sup 6}Li (to 15%). The shallow-burial index is greater than 1 (indicating that deep burial may be required) if the blanket is kept in the reactor for more than 2.5 yr. Nine percent of the total thermal power is unrecove… more
Date: December 20, 1990
Creator: Tobin, M.T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Inductively stabilized excimer lasers

Description: The technique of inductive stabilization of rare-gas halide discharges have been shown to yield long pulse laser outputs. The 1% efficiency obtained for the miniature short pulsed devices are believed to be very good. Length scaling to improve the gain per round trip of the laser cavity should improve the peak power in the cavity and greatly improve the extraction efficiency. This work is presently in progress. The measurement of a saturation energy for electrical energy deposition gives an imp… more
Date: December 1, 1983
Creator: Sze, R.C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Near spherical illumination of ion-beam and laser targets

Description: A procedure is developed for reducing energy-deposition asymmetry in spherical targets driven directly by ion or laser beams. This work is part of a strategy for achieving illumination symmetry in such targets, which is proposed as an alternative to those in the literature. This strategy allows an axially symmetric placement of beamlets, which would be convenient for some driven or reactor scenarios. It also allows the use of beam currents or energy fluxes and beam transverse profiles to help r… more
Date: December 12, 1985
Creator: Mark, J.W.K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Quantitative Luminescence Imaging System

Description: The goal of the MEASUREMENT OF CHEMILUMINESCENCE project is to develop and deliver a suite of imaging radiometric instruments for measuring spatial distributions of chemiluminescence. Envisioned deliverables include instruments working at the microscopic, macroscopic, and life-sized scales. Both laboratory and field portable instruments are envisioned. The project also includes development of phantoms as enclosures for the diazoluminomelanin (DALM) chemiluminescent chemistry. A suite of either … more
Date: December 31, 1992
Creator: Batishko, C. R.; Stahl, K. A. & Fecht, B. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Intracavity flux dependent absorption in e-beam pumped KrF

Description: Transient absorption measurements are performed on e-beam excited KrF under lasing and nonlasing conditions for 10% Kr (Ar diluent) and 99.6% Kr gas mixtures. The intracavity flux is varied by changing the output mirror reflectivity. The deposition rate for this experiment is {approx}396 kW/cm{sup 3}. For the 10% Kr and Kr-rich mixtures, the small signal absorption at 248.4 nm is 0.76%/cm and 1.25%/cm, respectively; while the nonsaturable absorption in 0.62%/cm and 0.90%/cm, respectively. A flu… more
Date: December 31, 1988
Creator: Seamans, J. F.; Kimura, W. D. & Hanson, D. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Development of a new plasma diagnostic of the critical surface and studies of the ion acoustic decay instability using collective Thomson scattering. Final report

Description: We have developed 5-channel collective Thomson scattering system to measure the ion acoustic wave excited by the ion acoustic wave decay instabilities. The multichannel collective Thomson scattering technique was established with 4{omega} probe laser beam using GDL laser system at LLE, Univ. of Rochester. We have obtained the ionic charge state Z by measuring the second harmonic emission from the ion acoustic decay instability. The LASNEX computer simulation calculations have been carried out. … more
Date: December 31, 1991
Creator: Mizuno, K.; DeGroot, J. S. & Seka, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Comparison of EGS5 Simulations with Experiment

Description: Simulations, made using EGS5, of the longitudinal and radial distributions of energy deposition of electrons of various energies are compared with experimental results in the literature. Energies and materials are: 1 GeV in water and aluminum; 6 GeV in aluminum, copper and lead; and (longitudinal only) 28.5 GeV in alumina (Al{sub 2}O{sub 3}). There is general agreement within a few percent over most of the shower profile. Substantial discrepancies are noted at depths far beyond shower maximum, … more
Date: December 1, 2006
Creator: Nelson, W. Ralph & Field, Clive
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

SEISMIC ATTENUATION FOR RESERVOIR CHARACTERIZATION

Description: We have developed and tested technology for a new type of direct hydrocarbon detection. The method uses inelastic rock properties to greatly enhance the sensitivity of surface seismic methods to the presence of oil and gas saturation. These methods include use of energy absorption, dispersion, and attenuation (Q) along with traditional seismic attributes like velocity, impedance, and AVO. Our approach is to combine three elements: (1) a synthesis of the latest rock physics understanding of how … more
Date: December 1, 2003
Creator: Walls, Joel; Taner, M. T.; Derzhi, Naum; Mavko, Gary & Dvorkin, Jack
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Local Measurement of Fuel Energy Deposition and Heat Transfer Environment During Fuel Lifetime Using Controlled Calorimetry

Description: A comprehensive description of the accomplishments of the DOE grant titled, ''Local Measurement of Fuel Energy Deposition and Heat Transfer Environment During Fuel Lifetime using Controlled Calorimetry''.
Date: December 31, 2001
Creator: Miller, D. W.; Kauffmann, A.; Kreidler, E.; Li, D.; Liu, H.; Mills, D. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

ITS Version 3.0: Powerful, user-friendly software for radiation modelling

Description: ITS (the Integrated Tiger Series) is a powerful, but user-friendly, software package permitting state-of-the-art modelling of electron and/or photon radiation effects. The programs provide Monte Carlo solution of linear time-independent coupled electron/photon radiation transport problems, with or without the presence of macroscopic electric and magnetic fields. The ITS system combines operational simplicity and physical accuracy in order to provide experimentalist and theorists alike with a me… more
Date: December 31, 1993
Creator: Kensek, R. P.; Halbleib, J. A. & Valdez, G. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Wakefield Calculations for Radiation Stopper 1 (RST1)

Description: The main result of this note is that no wakefield mitigation is required for the Radiation Stopper (RST1) in the LCLS injector. The RST1 geometry is not symmetric in the vertical direction, and we derive a slight modification to the diffraction model wake for a cylindrically symmetric (2D) cavity that can be used for this problem. Performing a full 3D MAFIA calculation for the nominal 1 mm (rms) long bunch, we show that the modified diffraction model well describes the wakefields generated in R… more
Date: December 13, 2010
Creator: Limborg-Deprey, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Medium properties and total energy coupling in underground explosions

Description: A phenomenological model is presented that allows the direct calculation of the effects of variations in medium properties on the total energy coupling between the medium and an underground explosion. The model presented is based upon the assumption that the shock wave generated in the medium can be described as a spherical blast wave at early times. The total energy coupled to the medium is then simply the sum of the kinetic and internal energies of this blast wave. Results obtained by use of … more
Date: December 15, 1975
Creator: Kurtz, S.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Cask crush pad analysis using detailed and simplified analysis methods

Description: A crush pad has been designed and analyzed to absorb the kinetic energy of a hypothetically dropped spent nuclear fuel shipping cask into a 44-ft. deep cask unloading pool at the Fluorinel and Storage Facility (FAST). This facility, located at the Idaho Chemical Processing Plant (ICPP) at the Idaho national Engineering and Environmental Laboratory (INEEL), is a US Department of Energy site. The basis for this study is an analysis by Uldrich and Hawkes. The purpose of this analysis was to evalua… more
Date: December 31, 1997
Creator: Uldrich, E.D. & Hawkes, B.D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Low to high energy beamstops for APT

Description: Beamstops are required for commissioning and operation of accelerators. The family of beamstops currently being developed for the DOE-sponsored Accelerator Production of Tritium (APT) program is addressed. The operational range encompasses proton energies of 6.7 MeV at the beginning of the RFQ to 1.7 GeV at the target/blanket, and both pulsed and cw operating modes. An additional beamstop was needed on a companion test facility to validate ion injector performance. This first of the series of b… more
Date: December 31, 1998
Creator: Doll, D.; Hagan, T. van; Redler, K.; Tooker, J.; Baxter, A.; Schneider, D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Thermal Deposition Analysis During Disruptions on DIII-D Using Infrared Scanners

Description: The DIII-D tokamak generates plasma discharges with currents up to 3 MA and auxiliary input power up to 20 MW from neutral beams and 4 MW from radio frequency systems. In a disruption, a rapid loss of the plasma current and internal thermal energy occurs and the energy is deposited onto the torus graphite wall. Quantifying the spatial and temporal characteristics of the heat deposition is important for engineering and physics-related issues, particularly for designing future machines such as IT… more
Date: December 1, 1995
Creator: Lee, R. L.; Hyatt, A. W.; Kellman, A. G.; Taylor, P. L. & Lasnier, C. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Preliminary design studies for an iridium rod target at the BNL-AGS

Description: The BNL-AGS is an intense source of 24 GeV protons. It is proposed to explore the potential to use these protons as the driver for a Pulsed Spallation Neutron Source target. The proposed target design is based on an edge cooled iridium rod concept--similar to the anti-proton production target which operated reliably at CERN under similar conditions. Lead, lead fluoride, and beryllium are investigated as possible reflector materials, and ambient temperature light water and 80 K light water ice a… more
Date: December 31, 1998
Creator: Ludewig, H.; Hastings, J.; Montanez, P. & Todosow, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Azimuthal asymmetry of particle production in Au + Au collisions at 11.6 A{center_dot}GeV/c

Description: Particle production was measured by the E866 forward spectrometer. It was reported earlier in our publication that a correlation between particle ratios and the asymmetry of energy deposition in zero degree calorimeter(ZCAL) was found. To further investigate the azimuthal asymmetry analysis, the forward hodoscope (HODO) was incorporated and the correlation between the particle production and the ``reaction plane`` will be discussed. Preliminary analysis shows enhanced in- plain proton productio… more
Date: December 31, 1996
Creator: Kurita, Kazuyoshi & Collaboration, E866
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Calorimetric sensors for energy deposition measurements

Description: A calorimetric sensor with several novel design features has been developed. These sensors will provide an accurate sampling of thermal power density and energy deposition from proton beams incident on target components of accelerator-based systems, such as the Accelerator Production of Tritium Project (APT) and the Spallation Neutron Source (SNS). A small, solid slug (volume = 0.347 cc) of target material is suspended by kevlar fibers and surrounded by an adiabatic enclosure in an insulating v… more
Date: December 31, 1998
Creator: Langenbrunner, J.; Cooper, R. & Morgan, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Design of an ogive-shaped beamstop

Description: This paper addresses the evolution, design, and development of a novel approach for topping cw (continuous-wave), non-rastered proton beams. Capturing the beam in vacuo within a long, axisymmetric surface of revolution has the advantages of spreading the deposited energy over a large area while minimizing prompt neutron backstreaming and reducing shield size and mass. Evolving from a cylinder/cone concept, the ogive shape avoids abrupt changes in geometry that produce sharp thermal transitions,… more
Date: December 31, 1998
Creator: Hagan, T.H. van; Doll, D.W.; Schneider, J.D. & Spinos, F.R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Temperature anisotropy and rotation upgrades to the ICRF modules in SNAP and TRANSP

Description: Fokker-Plank and transport codes have significantly better velocity-space treatment of the plasma than do the RF deposition models: FPP uses a 2 or 3D velocity space calculation, TRANSP uses Monte-Carlo particles, e.g., 3D in velocity space, many 2 and 3D spatial RF deposition codes are based on Maxwellians, with a single velocity-space parameter, i.e., the isotropic temperature. The ultimate goal of this effort was to provide the deposition codes with better velocity-space physics. For ICRH he… more
Date: December 31, 1992
Creator: Smithe, D.N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Monte Carlo calculations of track structures

Description: In the study of radiation effects in matter, a knowledge of the spatial distribution of secondary products and of energy deposited is important. For charged particles heavier than electrons, energy is deposited along an almost straight track which can be seen in photographic emulsions or cloud chambers. The initial effect of the energy deposition is the production of clouds of collectively excited electrons (``plasmons``), ions and secondary electrons (``delta rays`` which in turn produce plasm… more
Date: December 31, 1995
Creator: Bichsel, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen