10 Matching Results

Search Results

Advanced search parameters have been applied.

Instrument design program progress. Final report, May 1 1995--September 30, 1995

Description: The goals of the task for this time period were met, and the resulting tools were used to obtain significant results in a number additional studies. Six presentations will be published in the Proceedings of ICANS-XIII, the 13th Meeting of the International Collaboration on Advanced Neutron Sources, Paul Scherrer Institut, Villigen, Switzerland, October 11-14, 1995. The principle task in this time period and presented here was to make the neutron optics Monte Carlo library MCLIB as general as possible, and to collaborate in the construction of an object-oriented user interface to make it easy for relatively untrained users to use the codes to test neutron instrument designs. As of September 30, the interface could be used to define all element types necessary to study small-angle diffractometers or surface reflectometers.
Date: August 1, 1996
Creator: Seeger, P. A.
Partner: UNT Libraries Government Documents Department

Data reduction for neutron scattering from plutonium samples. Final report

Description: An experiment performed in August, 1993, on the Low-Q Diffractometer (LQD) at the Manual Lujan Jr. Neutron Scattering Center (MLNSC) was designed to study the formation and annealing of He bubbles in aged {sup 239}Pu metal. Significant complications arise in the reduction of the data because of the very high total neutron cross section of {sup 239}Pu, and also because the sample are difficult to make uniform and to characterize. This report gives the details of the data and the data reduction procedures, presents the resulting scattering patterns in terms of macroscopic cross section as a function of momentum transfer, and suggests improvements for future experiments.
Date: January 31, 1997
Creator: Seeger, P.A.
Partner: UNT Libraries Government Documents Department

Fast 3-D prestack depth migration with a parallel PSPI algorithm. Final report

Description: There was the need for general expertise in the porting of serial seismic reflection code to a parallel processing environment. The project was a continuation of Task Order 38 involving the improvement of existing parallel models developed for that task and to provide support in parallelizing other similar seismic codes to a miasively parallel processor environment.
Date: June 1, 1997
Creator: Roberts, P.M.; Alde, D.M. & House, L.S.
Partner: UNT Libraries Government Documents Department

Accelerator driven assembly

Description: This report addresses a Los Alamos National Laboratory (LANL) proposal to build a pulsed neutron source for simulating nuclear-weapons effects. A point design for the pulsed neutron facility was initiated early in FY94 after hosting a Defense Nuclear Agency (DNA) panel review and after subsequently visiting several potential clients and users. The technical and facility designs contained herein fulfill the Statement of Work (SOW) agreed upon by LANL and DNA. However, our point designs and parametric studies identify a unique, cost-effective, above-ground capability for neutron nuclear-weapons-effects studies at threat levels. This capability builds on existing capital installations and infrastructure at LANL. We believe that it is appropriate for us, together with the DNA, to return to the user community and ask for their comments and critiques. We also realize that the requirements of last year have changed significantly. Therefore, the present report is a `working document` that may be revised where feasible as we learn more about the most recent Department of Defense (DoD) and Department of Energy (DOE) needs.
Date: January 1997
Creator: Balderas, J.; Cappiello, M.; Cummings, C. E. & Davidson, R.
Partner: UNT Libraries Government Documents Department

3D Atlas vertical plate oil transmission line field calculations. Final report

Description: Because of questions regarding current density and inductance estimates of the Atlas oil transmission line in the region where the vertical plates connect to the disk line, calculations using the 3D FE program Flux3d were initiated. Flux3d inductance values are nearly that estimated by D. Scudder. Calculations for three base designs of E. Ballard and D. Pierce were completed where several variations for each base design were used to determine the important parameters affecting inductance and to check inductance consistency. Flux3d showed for the first base design a very high current density of 36MA/m at the connection between the vertical and horizontal ground plates resulting in a magnetic pressure of 120 kpsi. The second base design modified this connection to reduce the current density to 20MA/m and 36 kpsi and for design 3 current density is 17MA/m. Maximum current density on the hot plates is 20MA/m for all 3 designs. These values assumed 1.2MA per VTL or 45.6MA total system current. Electrical fields on the top of the hot plate near the disk line connection is about 50% greater than the nominal value near the center of the vertical plates.
Date: September 18, 1997
Partner: UNT Libraries Government Documents Department

MLNSC instrument design and simulation package, task order 57 (modified). Final report, September 30, 1997

Description: The objectives of this task as described in Statement of Work have been met and the documents required as Deliverables have been prepared and submitted to the requester. Specifically, a document titled ``The MCLIB Library: Monte Carlo Simulation of Neutron Scattering Instruments,`` revised September 23, 1997, includes documentation of new standards, code revisions and additions, and some improved efficiency due to improved optimization strategies. The procedures for user implementation of new optical devices, and information on using the package and reading and viewing the output have also been included. Second, a new document entitled ``MCLIB Element Definitions and Help`` was written and revised through the duration of the task, to supply the needed input to group CIC-15 for the purpose of integrating the MCLIB package with a web-based user interface. Finally, an application of the package was presented and a (successful) demonstration of the new user interface was given at a workshop at Argonne National Laboratory, August 24--26, 1997, as described in the modification to the Statement of Work.
Date: October 3, 1997
Creator: Seeger, P.A.
Partner: UNT Libraries Government Documents Department

Summary report for subcontract No. 0412J0004-3Y, task order 23. Final report

Description: This task covers work performed by Carlton S. Young for various projects in Group P-22, Los Alamos National Lab from September 1996 to September 22, 1997. Projects worked on and charged to contract: (1) rebound, 80%; (2) reports on Nevada events Divider and Victoria, 10%; (3) FORTRAN modifications to a Macintosh version of the ACCEPT code and calculations on GAAs PCDs and Cherenkov detectors, 0%; (4) design of time and space-resolved burn measurements for the National Ignition Facility (NIF) based on a gas Cherenkov gamma-ray detector and proposals for more money to do the same, 10%. A summary of work on each project is included.
Date: October 2, 1997
Partner: UNT Libraries Government Documents Department

Final report for task order No. 26

Description: This is a final report for task order No. 26 between the University of California, Los Alamos National Laboratory and Sumner Associates issued 20 March, 1995. The task statement for order No. 26 is as follows: {open_quotes}Provide assistance on the design of experimental arrangements for acquisition of data describing the interaction of neutrons with selected materials arranged in geometry.{close_quotes} {open_quotes}Provide assistance in the delivery of drawings and specifications associated with the task.{close_quotes} Three experimental descriptions follow; Dynamic Temperature Measurements in Explosives and Inert Simulants Using Neutron Resonance Radiography, Measurements of the Phonon Frequency Spectrum of Pu from Neutron Resonance Broadening, and Resonant Neutron Absorption Spectroscopy of Hi-Temperature Superconductors, that fulfill the task statement.
Date: October 1, 1995
Creator: Trela, W.J.
Partner: UNT Libraries Government Documents Department

Final report on Task 55

Description: This report very briefly summarizes subcontractor activities related to fiber optic imaging and measurement techniques. Activities described include interferometry measurements of plasma jets and pressure measurement in a shock front. Work on the Russian infrared imaging camera is discussed in somewhat more detail. No work was performed on the mode locked laser.
Date: September 29, 1997
Creator: Forman, P.R.
Partner: UNT Libraries Government Documents Department

Summary report to EES-13, Yucca Mountain Project: Outcomes of Task Order 52 between Sumner Associates and Los Alamos National Laboratory

Description: This report very briefly describes progress on subcontractor activities related to the Yucca Mountain Project (YMP). The activities described primarily involved report preparation and editing. Activities receiving emphasis in the progress report are the Summary and Synthesis Report on Radionuclide Retardation for the Yucca Mountain Site Characterization Project and preparation of an article on Los Alamos YMP research. Other activities are related to a heat and mass transfer computer code and chloring 36 studies.
Date: September 26, 1997
Creator: Eckhardt, R.
Partner: UNT Libraries Government Documents Department