1-D Van der Waals Foams Heated by Ion Beam Energy Deposition (open access)

1-D Van der Waals Foams Heated by Ion Beam Energy Deposition

One dimensional simulations of various initial average density aluminum foams (modeled as slabs of solid metal separated by low density regions) heated by volumetric energy deposition are conducted with a Lagrangian hydrodynamics code using a van der Waals equation of tate (EOS). The resulting behavior is studied to facilitate the design of future warm dense matter (WDM) experiments at LBNL. In the simulations the energy deposition ranges from 10 to 30 kJ/g and from 0.075 to 4.0 ns total pulse length, resulting in temperatures from approximately 1 o 4 eV. We study peak pressures and temperatures in the foams, expansion velocity, and the phase evolution. Five relevant time scales in the problem are identified. Additionally, we present a method for characterizing the level of inhomogeneity in a foam target as it is heated and the time it takes for a foam to homogenize.
Date: December 23, 2009
Creator: Zylstra, A. B.; Barnard, J. J. & More, R. M.
Object Type: Article
System: The UNT Digital Library
A 3-dimensional theory of free electron lasers (open access)

A 3-dimensional theory of free electron lasers

In this paper, we present an analytical three-dimensional theory of free electron lasers. Under several assumptions, we arrive at an integral equation similar to earlier work carried out by Ching, Kim and Xie, but using a formulation better suited for the initial value problem of Coherent Electron Cooling. We use this model in later papers to obtain analytical results for gain guiding, as well as to develop a complete model of Coherent Electron Cooling.
Date: August 23, 2010
Creator: Webb, S. D.; Wang, G. & Litvinenko, V. N.
Object Type: Article
System: The UNT Digital Library
6 GeV light source project cost estimating procedure (open access)

6 GeV light source project cost estimating procedure

To maintain uniformity in estimating the cost requirements of the various components of the 6 GeV Light Source, the following procedure will be used by all the task groups. The procedure uses a Work Breakdown Structure (VBS) to break down the project into manageable, easy to estimate, components. The project is first broken down into major tasks or categories. Then each major division is continuously subdivided until the desired level of detail is achieved. This can be shown best by using the example of the WBS of the Aladdin Upgrade Project, excerpts of which are included in Appendix A.
Date: October 23, 1985
Creator: unknown
Object Type: Report
System: The UNT Digital Library
8-oxoguainine enhances bending of DNA that favors binding of glycosylases (open access)

8-oxoguainine enhances bending of DNA that favors binding of glycosylases

Molecular dynamics (MD) simulations were carried out on the DNA oligonucleotide GGGAACAACTAG:CTAGTTGTTCCC in its native form and with guanine in the central G19:C6 base pair replaced by 8-oxoguanine (8oxoG). A box of explicit water molecules was used for solvation and Na+ counterions were added to neutralize the system. The direction and magnitude of global bending were assessed by a technique used previously to analyze simulations of DNA containing a thymine dimer. The presence of 8oxoG did not greatly affect the magnitude of DNA bending; however, bending into the major groove was significantly more probable when 8oxoG replaced G19. Crystal structures of glycosylases bound to damaged-DNA substrates consistently show a sharp bend into the major groove at the damage site. We conclude that changes in bending dynamics that assist the formation of this kink are a part of the mechanism by which glycosylases of the base excision repair pathway recognize the presence of 8oxoG in DNA.
Date: April 23, 2003
Creator: Miller, John H.
Object Type: Article
System: The UNT Digital Library
A 15-T Pulsed Solenoid for a High-Power Target Experiment (open access)

A 15-T Pulsed Solenoid for a High-Power Target Experiment

The MERIT experiment, which ran at CERN in 2007, is a proof-of-principle test for a target system that converts a 4-MW proton beam into a high-intensity muon beam for either a neutrino factory complex or a muon collider. The target system is based on a free mercury jet that intercepts an intense proton beam inside a 15-T solenoidal magnetic field. Here, we describe the design and performance of the 15-T, liquid-nitrogen-precooled, copper solenoid magnet.
Date: June 23, 2008
Creator: Kirk, H. G.; Efthymiopoulos, I.; Fabich, A.; Haug, F.; Pereira, H.; Titus, P. et al.
Object Type: Article
System: The UNT Digital Library
19 mm ballistic range: a potpourri of techniques and recipes (open access)

19 mm ballistic range: a potpourri of techniques and recipes

The expansion of ballistic gun range facilities at LLL has introduced state-of-the-art diagnostic techniques to glovebox-enclosed ballistic guns systems. These enclosed ballistic ranges are designed for the study of one- dimensional shock phenomena in extremely toxic material such as plutonium. The extension of state-of-the-art phtographic and interferometric diagnostic systems to glovebox-enclosed gun systems introduces new design boundaries and performance criteria on optical and mechanical components. A technique for experimentally evaluating design proposals is illustrated, and several specific examples (such as, target alignment, collateral shrapnel damage, and soft recovery) are discussed. (auth)
Date: September 23, 1975
Creator: Carpluk, G.T.
Object Type: Article
System: The UNT Digital Library
25 Process Assistance. For Period of May 2, 1955 to May 13, 1955 (open access)

25 Process Assistance. For Period of May 2, 1955 to May 13, 1955

None
Date: May 23, 1955
Creator: Culler, F L
Object Type: Report
System: The UNT Digital Library
40-kV, 25-ms neutral-beam power supply for TMX (open access)

40-kV, 25-ms neutral-beam power supply for TMX

Modifications are described to upgrade the neutral-beam power supply for the TMX from 40 kV, 10 ms to 40 kV, 25 ms. The redesign of the accel and suppressor power supplies to achieve separation of the high-voltage and control sections, operation of the arc pulse lines in series, operation of the arc pulse lines in a noisy environment with SCR trigger and crowbar, and modifications to the electrolytic storage banks are discussed.
Date: September 23, 1977
Creator: Leavitt, G.A.
Object Type: Article
System: The UNT Digital Library
100 Area electrical distribution fault and coordination report (open access)

100 Area electrical distribution fault and coordination report

This report documents three-phase and line-to-ground fault values and time overcurrent coordination curves for the electrical utility distribution system located in the 100 Areas. Activities that may improve the coordination of the distribution system have also been identified. An evaluation of system coordination was performed. The results of this evaluation are listed in Appendix B. There are protective devices within the 100 Area distribution system that do not coordinate with one another throughout the Areas. There is also a mis-application of reclosing relays at the 100B Area. The impact of the mis-coordination and incorrect application of reclosing relays is that system selectivity is reduced. Equipment will still be protected against damaging currents, however more equipment will be de-energized than necessary during fault conditions. It is the opinion of the author of this report that the cases of mis-coordination listed above, and in Appendix B, do not significantly degrade the system protection system nor the reliability of the 100 Area distribution system. Therefore, immediate response to correct these problems is not recommended. However, a planned methodology, outlined in an Activity Plan, to correct these problems should be developed and implemented in the near future.
Date: September 23, 1994
Creator: Webber, J. J.
Object Type: Report
System: The UNT Digital Library
100 Area Water Study (open access)

100 Area Water Study

This paper gives a cost breakdown of all the water facilities in the 100-F area for the month of January, 1948. Also given is the cost of chlorine for addition to the process water system along with where it is added and in what amounts. Lastly, the average figure for the hardness for the Columbia River water at Hanford.
Date: September 23, 1948
Creator: Beekman, S. W.
Object Type: Report
System: The UNT Digital Library
100 Areas: (For technical progress letter No. 111), August 13--August 19 (open access)

100 Areas: (For technical progress letter No. 111), August 13--August 19

This technical progress report details 100 Area activities for the time period of August 13 through August 19, 1946.
Date: August 23, 1946
Creator: Jordan, W. E.
Object Type: Report
System: The UNT Digital Library
105-DR Large sodium fire facility soil sampling data evaluation report (open access)

105-DR Large sodium fire facility soil sampling data evaluation report

This report evaluates the soil sampling activities, soil sample analysis, and soil sample data associated with the closure activities at the 105-DR Large Sodium Fire Facility. The evaluation compares these activities to the regulatory requirements for meeting clean closure. The report concludes that there is no soil contamination from the waste treatment activities.
Date: January 23, 1996
Creator: Adler, J. G.
Object Type: Report
System: The UNT Digital Library
(129)Xe NMR of Mesoporous Silicas (open access)

(129)Xe NMR of Mesoporous Silicas

The porosities of three mesoporous silica materials were characterized with {sup 129}Xe NMR spectroscopy. The materials were synthesized by a sol-gel process with r = 0, 25, and 70% methanol by weight in an aqueous cetyltrimethylammonium bromide solution. Temperature dependent chemical shifts and spin lattice relaxation times reveal that xenon does not penetrate the pores of the largely disordered (r= 70%) silica. For both r = 0 and 25%, temperature dependent resonances corresponding to physisorbed xenon were observed. An additional resonance for the r = 25% sample was attributed to xenon between the disordered cylindrical pores. 2D NMR exchange experiments corroborate the spin lattice relaxation data which show that xenon is in rapid exchange between the adsorbed and the gas phase.
Date: April 23, 1999
Creator: Anderson, M.T.; Asink, R.A.; Kneller, J.M. & Pietrass, T.
Object Type: Article
System: The UNT Digital Library
200 kW neutral beam injection into the 2XII mirror device (open access)

200 kW neutral beam injection into the 2XII mirror device

None
Date: April 23, 1973
Creator: Coensgen, F. H.; Cummins, W. F.; Nexsen, W. E., Jr.; Molvik, A. W. & Simonen, T. C.
Object Type: Article
System: The UNT Digital Library
201 MHz Cavity R&D for MUCOOL and MICE (open access)

201 MHz Cavity R&D for MUCOOL and MICE

We describe the design, fabrication, analysis and preliminary testing of the prototype 201 MHz copper cavity for a muon ionization cooling channel. Cavity applications include the Muon Ionization Cooling Experiment (MICE) as well as cooling channels for a neutrino factory or a muon collider. This cavity was developed by the US muon cooling (MUCOOL) collaboration and is being tested in the MUCOOL Test Area (MTA) at Fermilab. To achieve a high accelerating gradient, the cavity beam irises are terminated by a pair of curved, thin beryllium windows. Several fabrication methods developed for the cavity and windows are novel and offer significant cost savings as compared to conventional construction methods. The cavity's thermal and structural performances are simulated with an FEA model. Preliminary high power RF commissioning results will be presented.
Date: June 23, 2006
Creator: Li, Derun; Virostek, Steve; Zisman, Michael; Norem, Jim; Bross,Alan; Moretti, Alfred et al.
Object Type: Article
System: The UNT Digital Library
222-S Analytical services final results for Tank 241-U-101, grab samples 1U-96-1 through 1U-96-4 (open access)

222-S Analytical services final results for Tank 241-U-101, grab samples 1U-96-1 through 1U-96-4

This document is the final, format IV, laboratory report for characterization of tank 241-U-101 (U-101) grab samples from risers 1 and 7. It transmits additional analytical data for specific gravity (Sp.G.), and all raw analytical data which were not provided in the 45-day report. The 45-day report is attached to this final report as Part II. Secondary analyses were not performed on any of the U-101 samples. This is because none of the primary analyte limits, which trigger the performance of secondary analyses, were exceeded. Grab samples were taken on May 29, 1996 and May 30, 1996 from risers 1 and 7, respectively, and were received at the 222-S Laboratory on the same days that they were collected. Analyses were performed in accordance with the Tank Sampling and Analysis Plan (TSAP) for this tank and the Safety Screening Data Quality Objective (DQO). The samples were analyzed for differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), total alpha activity (AT), visual appearance, bulk density, and specific gravity. A sample data summary table, includes sample analytical data accompanied by quality control data (for example, duplicate, spike, blank and standard results and detection limits and counting efforts). The table includes data for DSC, TGA, …
Date: August 23, 1996
Creator: Miller, G. L.
Object Type: Report
System: The UNT Digital Library
234-5 project specification letter 235-41 Chemical Development Laboratory (open access)

234-5 project specification letter 235-41 Chemical Development Laboratory

This document presents details of the specifications for the chemical development laboratory, in accordance with project 234-5.
Date: December 23, 1947
Creator: Work, J.B.
Object Type: Report
System: The UNT Digital Library
241-AZ-101 Waste Tank Color Video Camera System Shop Acceptance Test Report (open access)

241-AZ-101 Waste Tank Color Video Camera System Shop Acceptance Test Report

This report includes shop acceptance test results. The test was performed prior to installation at tank AZ-101. Both the camera system and camera purge system were originally sought and procured as a part of initial waste retrieval project W-151.
Date: March 23, 2000
Creator: Werry, S. M.
Object Type: Report
System: The UNT Digital Library
242-A Evaporator Condensate Tank (TK-C-100) tie down evaluation (open access)

242-A Evaporator Condensate Tank (TK-C-100) tie down evaluation

The existing Condensate Tank (TK-C-100) in the 242-A Evaporator building is not anchored to the floor slab. This tank is a Safety Class 3 sitting in a Safety Class 2 building. The tank needed to be evaluated to withstand the seismic loads. Anchor bolts have been designed to hold the tank during the seismic event.
Date: January 23, 1995
Creator: Hundal, T. S.
Object Type: Report
System: The UNT Digital Library
242-A Evaporator ion exchange column (IX-D-1) tie down evaluation (open access)

242-A Evaporator ion exchange column (IX-D-1) tie down evaluation

The existing ion exchange column in the 242-A evaporator building is not anchored to the floor slab. This equipment is a Safety Class 3 sitting in a Safety Class 2 building. The column needed to be evaluated to withstand the seismic loads. Anchor bolts have been designed to hold the column during the seismic event.
Date: January 23, 1995
Creator: Hundal, T. S.
Object Type: Report
System: The UNT Digital Library
242-A/LERF programmable Logic Controller Ladder. Revision 1 (open access)

242-A/LERF programmable Logic Controller Ladder. Revision 1

This document defines and describes the user-generated application software written to transmit digital and analog signals from the Liquid Effluent Retention Facility (LERF) to the 242-A Evaporator Distributed Control System (DCS). PLCs and modems were installed in the 242-A Evaporator by Project W-105 (LERF) to transmit 6 analog liquid level signals, 6 range alarms based on the analog signals, and 6 leak detection and pump status signals to the 242-A Distributive Control System (DCS) from LERF. Communications between the two facilities are also monitored and alarm on the DCS. Following the Project W-105 completion, the communications and signal mix were modified by Project C-018H (ETF). The current PLC software (including ladder logic and data tables), PLC hardware settings, and modern option settings to transmit the signals and monitor communications are documented and described in this document.
Date: May 23, 1995
Creator: Teats, M.C.
Object Type: Report
System: The UNT Digital Library
A 1200 element detector system for synchrotron-based coronary angiography (open access)

A 1200 element detector system for synchrotron-based coronary angiography

A 1200 channel Si(Li) detector system has been developed for transvenous coronary angiography experiments using synchrotron radiation. It is part of the synchrotron medical imaging facility at the National Synchrotron Light Source. The detector is made from a single crystal of lithium-drifted silicon with an active area 150 mm long {times} 11 mm high {times} 5 mm thick. The elements are arranged in two parallel rows of 600 elements with a center-to-center spacing of 0.25 mm. All 1200 elements are read out simultaneously every 4 ms. A Intel 80486 based computer with a high speed digital signal processing interface is used to control the beamline hardware and to acquire a series of images. The signal-to-noise, linearity and resolution of the system have been measured. Human images have been taken with this system.
Date: August 23, 1993
Creator: Thompson, A. C.; Lavender, W. M.; Rubenstein, E.; Giacomini, J. C.; Rosso, V.; Schulze, C. et al.
Object Type: Article
System: The UNT Digital Library
1997 Atmospheric Chemistry Colloquium for Emerging Senior Scientists (open access)

1997 Atmospheric Chemistry Colloquium for Emerging Senior Scientists

DOE's Atmospheric Chemistry Program is providing partial funding for the Atmospheric Chemistry Colloquium for Emerging Senior Scientists (ACCESS) and FY 1997 Gordon Research Conference in Atmospheric Chemistry
Date: November 23, 1998
Creator: Wine, Paul H.
Object Type: Article
System: The UNT Digital Library
1999 Gordon Research Conference on Microbial Population Biology. Final Progress Report (open access)

1999 Gordon Research Conference on Microbial Population Biology. Final Progress Report

None
Date: July 23, 1999
Creator: unknown
Object Type: Article
System: The UNT Digital Library