U N T Established 1890 U N T
University Libraries

Digital Collections

Access

Resource Type

Partner

Collection

Serial/Series Title

Degree Department

Degree Discipline

Degree Level

Country

States

Counties

Decade

Year

Month

Day

Language

76,712 Matching Results

Start Over Day 10th Language English

Results open in a new window/tab.

Results: 1 - 24 of 76,712 next
Best Match Title Creator Date Created (Newest) Date Created (Oldest) Date Added (Newest) Date Added (Oldest)
0.351 micron Laser Beam propagation in High-temperature Plasmas (open access)

0.351 micron Laser Beam propagation in High-temperature Plasmas

A study of the laser-plasma interaction processes have been performed in plasmas that are created to emulate the plasma conditions in indirect drive inertial confinement fusion targets. The plasma emulator is produced in a gas-filled hohlraum; a blue 351-nm laser beam propagates along the axis of the hohlraum interacting with a high-temperature (T{sub e} = 3.5 keV), dense (n{sub e} = 5 x 10{sup 20}cm{sup -3}), long-scale length (L {approx} 2 mm) plasma. Experiments at these conditions have demonstrated that the interaction beam produces less than 1% total backscatter resulting in transmission greater than 90% for laser intensities less than I < 2 x 10{sup 15} W-cm{sup -2}. The bulk plasma conditions have been independently characterized using Thomson scattering where the peak electron temperatures are shown to scale with the hohlraum heater beam energy in the range from 2 keV to 3.5 keV. This feature has allowed us to determine the thresholds for both backscattering and filamentation instabilities; the former measured with absolutely calibrated full aperture backscatter and near backscatter diagnostics and the latter with a transmitted beam diagnostics. A plasma length scaling is also investigated extending our measurements to 4-mm long high-temperature plasmas. At intensities I < 5 x …
Date: December 10, 2007
Creator: Froula, D.; Divol, L.; Meezan, N.; Ross, J.; Berger, R. L.; Michel, P. et al.
Object Type: Report
System: The UNT Digital Library
1.1" Ammunition Hoist - Trunks

1.1" Ammunition Hoist - Trunks

Blueprint depicting technical details of Battleship Texas.
Date: April 10, 1941
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
1.1" Ammunition Hoist - Trunks [BB-34]

1.1" Ammunition Hoist - Trunks [BB-34]

Blueprint depicting technical details of Battleship Texas.
Date: April 10, 1941
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
1-10 Mbar Laser-Driven Shocks Using the Janus Laser Facility (open access)

1-10 Mbar Laser-Driven Shocks Using the Janus Laser Facility

We report preliminary results using the Lawrence Livermore National Laboratory (LLNL) Janus laser facility to generate high pressure laser-driven shocks in the 1-10 Mbar regime. These experiments address various issues, including shock steadiness, planarity, uniformity and low target preheat, important for making precision EOS measurements on a small (E < 250 J) laser facility. A brief description of the experimental techniques, target design and measurements will be given.
Date: August 10, 2001
Creator: Dunn, J.; Price, D. F.; Moon, S. J.; Cauble, R. C.; Springer, P. T. & Ng, A.
Object Type: Article
System: The UNT Digital Library
2" heavy pressure valve

2" heavy pressure valve

Blueprint depicting technical details of Battleship Texas.
Date: June 10, 1912
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
2-J Hamburger [Interior]

2-J Hamburger [Interior]

Photograph of interior of 2-J Hamburger at North Lamar and 40th streets in Austin, Texas. The overhead view shows male kitchen workers preparing burgers on the left, female workers bagging orders and cashiering in the center, and the customers ordering at the counter on the right. The back of a large menu hanging from the ceiling is visible on the right above the customers. Cars are visible in the parking lot, seen through the windows. The male employees wear white pants, white shirts, and white paper caps that say "2-J". The female workers wear white dresses with name badges. There are both Caucasian and African-American employees.
Date: August 10, 1960
Creator: Douglass, Neal
Object Type: Photograph
System: The Portal to Texas History
2-MV electrostatic quadrupole injector for heavy-ion fusion (open access)

2-MV electrostatic quadrupole injector for heavy-ion fusion

High current and low emittance are principal requirements for heavy-ion injection into a linac driver for inertial fusion energy. An electrostatic quadrupole (ESQ) injector is capable of providing these high charge density and low emittance beams. We have modified the existing 2-MV Injector to reduce beam emittance and to double the pulse length. We characterize the beam delivered by the modified injector to the High Current Transport Experiment (HCX) and the effects of finite rise time of the extraction voltage pulse in the diode on the beam head. We demonstrate techniques for mitigating aberrations and reducing beam emittance growth in the injector.
Date: November 10, 2004
Creator: Bieniosek, F. M.; Celata, C. M.; Henestroza, E.; Kwan, J. W.; Prost, L. & Seidl, P. A.
Object Type: Article
System: The UNT Digital Library
3"/50 Cal. AA Battery Control from Mark 51 Directors Fire Control Circuit GH Elementary Wiring Diagram

3"/50 Cal. AA Battery Control from Mark 51 Directors Fire Control Circuit GH Elementary Wiring Diagram

Blueprint depicting technical details of Battleship Texas.
Date: August 10, 1943
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
3-D Force-balanced Magnetospheric Configurations (open access)

3-D Force-balanced Magnetospheric Configurations

The knowledge of plasma pressure is essential for many physics applications in the magnetosphere, such as computing magnetospheric currents and deriving magnetosphere-ionosphere coupling. A thorough knowledge of the 3-D pressure distribution has however eluded the community, as most in-situ pressure observations are either in the ionosphere or the equatorial region of the magnetosphere. With the assumption of pressure isotropy there have been attempts to obtain the pressure at different locations by either (a) mapping observed data (e.g., in the ionosphere) along the field lines of an empirical magnetospheric field model or (b) computing a pressure profile in the equatorial plane (in 2-D) or along the Sun-Earth axis (in 1-D) that is in force balance with the magnetic stresses of an empirical model. However, the pressure distributions obtained through these methods are not in force balance with the empirical magnetic field at all locations. In order to find a global 3-D plasma pressure distribution in force balance with the magnetospheric magnetic field, we have developed the MAG-3D code, that solves the 3-D force balance equation J x B = (upside-down delta) P computationally. Our calculation is performed in a flux coordinate system in which the magnetic field is expressed in terms …
Date: February 10, 2003
Creator: Zaharia, Sorin; Cheng, C. Z. & Maezawa, K.
Object Type: Report
System: The UNT Digital Library
3" relief valves spring H.P. cylinder

3" relief valves spring H.P. cylinder

Blueprint depicting technical details of Battleship Texas.
Date: March 10, 1938
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
A 3-year plan for beam science in the heavy-ion fusion virtual national laboratory (open access)

A 3-year plan for beam science in the heavy-ion fusion virtual national laboratory

In December 1998, LBNL Director Charles Shank and LLNL Director Bruce Tarter signed a Memorandum of Agreement to create the Heavy-Ion Fusion Virtual National Laboratory (HIF-VNL) with the purpose of improving the efficiency and productivity of heavy ion research through coordination of the two laboratories' efforts under one technical director. In 1999, PPPL Director Robert Goldston signed the VNL MOA for PPPL's heavy-ion fusion group to join the VNL. LBNL and LLNL each contribute about 45% of the $10.6 M/yr trilab VNL effort, and PPPL contributes currently about 10% of the VNL effort. The three labs carry out collaborative experiments, theory and simulations of a variety of intense beam scientific issues described below. The tri-lab HIF VNL program is part of the DOE Office of Fusion Energy Sciences (OFES) fusion program. A short description of the four major tasks areas of HIF-VNL research is given in the next section. The task areas are: High Current Experiment, Final Focus/Chamber Transport, Source/Injector/Low Energy Beam Transport (LEBT), and Theory/Simulation. As a result of the internal review, more detailed reviews of the designs, costs and schedules for some of the tasks have been completed, which will provide more precision in the scheduled completion dates …
Date: September 10, 2001
Creator: Logan, B. Grant
Object Type: Report
System: The UNT Digital Library
A 4.2 GS/sec. Synchronized Vertical Excitation System for SPS Studies - Steps Toward Wideband Feedback (open access)

A 4.2 GS/sec. Synchronized Vertical Excitation System for SPS Studies - Steps Toward Wideband Feedback

A 4.2 GS/sec. beam excitation system with accelerator synchronization and power stages is described. The system is capable of playing unique samples (32 samples/bunch) for 15,000 turns on selected bunch(es) in the SPS in syn- chronism with the injection and acceleration cycle. The purpose of the system is to excite internal modes of single-bunch vertical motion, and study the bunch dynamics in the presence of developing Electron cloud or TMCI effects. The system includes a synchronized master oscillator, SPS timing functions, an FPGA based arbitrary waveform generator, 4.2 GS/sec. D/A system and four 80W 20-1000 MHz amplifiers driving a tapered stripline pickup/kicker. A software GUI allows specification of various modulation signals, selection of bunches and turns to excite, while a remote control interface allows simple control/monitoring of the RF power stages located in the tunnel. The successful use of this system for SPS MD measurements in 2011 is a vital proof-of-principle for wideband feedback using similar functions to correct the beam motion.
Date: July 10, 2012
Creator: Fox, John
Object Type: Article
System: The UNT Digital Library
The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 27, Ed. 1 Monday, October 10, 1977 (open access)

The 4-County News Bulletin (Castroville, Tex.), Vol. 19, No. 27, Ed. 1 Monday, October 10, 1977

Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date: October 10, 1977
Creator: Schott, Bobbie
Object Type: Newspaper
System: The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 20, No. 1, Ed. 1 Monday, April 10, 1978 (open access)

The 4-County News Bulletin (Castroville, Tex.), Vol. 20, No. 1, Ed. 1 Monday, April 10, 1978

Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date: April 10, 1978
Creator: Schott, Bobbie
Object Type: Newspaper
System: The Portal to Texas History
The 4-County News Bulletin (Castroville, Tex.), Vol. 20, No. 14, Ed. 1 Monday, July 10, 1978 (open access)

The 4-County News Bulletin (Castroville, Tex.), Vol. 20, No. 14, Ed. 1 Monday, July 10, 1978

Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date: July 10, 1978
Creator: Schott, Bobbie
Object Type: Newspaper
System: The Portal to Texas History
[5 Days Left To Enter TDNA Awards Contest] (open access)

[5 Days Left To Enter TDNA Awards Contest]

A notice from the Texas Daily Newspaper Associations, which states that the deadline to enter the TDNA Awards is in five days, a January 15 deadline. The document requests that TDNA members pass the notice along to publishers, editors, copy editors, sportswriters, marketing and promotion staff who have worked hard to promote their newspapers to the community that the deadline is soon. The document also details the type of awards that are available. Winners will receive awards at the 2006 TDNA Annual Meeting on Monday, March 20, 2006 at the Renaissance Worthington Hotel in Fort Worth.
Date: January 10, 2008
Creator: Texas Daily Newspaper Association
Object Type: Text
System: The UNT Digital Library
5" Heavy Pressure Valve, Cast Steel (5" Steam Steering Engine Stop)

5" Heavy Pressure Valve, Cast Steel (5" Steam Steering Engine Stop)

Blueprint depicting technical details of Battleship Texas.
Date: December 10, 1913
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
The 10,000 Year Plan (open access)

The 10,000 Year Plan

Pallavi Pharkya thinks a lot about the future. Pharkya, a Ph.D. candidate in materials science and engineering, works in the area of corrosion science, predicting how materials will perform over extended periods of time. Her particular focus is a nickel-chromium-molybdenum alloy called C-22, a highly corrosion-resistant metal. Pharkya's aim is to help determine whether containers made from C-22 can be used to store high-energy nuclear waste--for 10,000 years and longer. Pharkya's work is part of a plan by the U.S. Department of Energy to consolidate the country's nuclear waste in a single proposed repository. The proposed repository is in Yucca Mountain located in a remote Nevada desert. Currently about 70,000 metric tons of spent nuclear fuel and high-level radioactive waste are divided between approximately 100 sites around the country. The undertaking, Pharkya emphasizes, is massive. To study just the corrosion aspects of the packaging, Case is collaborating with eight other universities, five national labs and Atomic Energy of Canada Limited. Even with so many players, the study will likely take several years to complete. Heading the entire group is Joe Payer, a professor of materials science and engineering at Case and Pharkya's mentor. ''I came here to have the opportunity …
Date: February 10, 2006
Creator: Srisaro, L.
Object Type: Article
System: The UNT Digital Library
THE 10,000 YEAR PLAN (open access)

THE 10,000 YEAR PLAN

Pharkya, a Ph.D. candidate in materials science and engineering, works in the area of corrosion science, predicting how materials will perform over extended periods of time. Her particular focus is a nickel-chromium-molybdenum alloy called C-22, a highly corrosion-resistant metal. Pharkya's aim is to help determine whether containers made from C-22 can be used to store high-energy nuclear waste--for 10,000 years and longer. Pharkya's work is part of a plan by the U.S. Department of Energy to consolidate the country's nuclear waste in a single proposed repository. The proposed repository is in Yucca Mountain located in a remote Nevada desert. Currently about 70,000 metric tons of spent nuclear fuel and high-level radioactive waste are divided between approximately 100 sites around the country. The undertaking, Pharkya emphasizes, is massive. To study just the corrosion aspects of the packaging, Case is collaborating with eight other universities, five national labs and Atomic Energy of Canada Limited. Even with so many players, the study will likely take several years to complete. Heading the entire group is Joe Payer, a professor of materials science and engineering at Case and Pharkya's mentor. ''I came here to have the opportunity to work with Dr. Payer, an expert in …
Date: February 10, 2006
Creator: Srisuro, L.
Object Type: Article
System: The UNT Digital Library
10-MWe pilot-plant-receiver-panel test-requirements document: Solar Thermal Test Facility (open access)

10-MWe pilot-plant-receiver-panel test-requirements document: Solar Thermal Test Facility

Plans are presented for insolation testing of a full-scale test receiver panel and supporting hardware which essentially duplicate both physically and functionally the design planned for the 10 MWe pilot plant. Testing includes operation during normal start and shutdown, intermittent cloud conditions, and emergencies to determine the transient and steady state operating characteristics and performance under conditions equal to or exceeding those expected in the pilot plant. The effects of variations of input and output conditions on receiver operation are also to be investigated. A brief description of the pilot plant receiver subsystem is presented, followed by a detailed description of the receiver assembly to be tested at the Solar Thermal Test Facility. Major subassemblies are described, including the receiver panel, flow control, electrical control and instrumentation, and the structural assembly. Requirements of the Solar Thermal Test Facility for the tests are given. System safety measures are described. The tests, operating conditions, and expected results are presented. Quality assurance, task responsibilities, and test documentation are also discussed. (LEW)
Date: June 10, 1978
Creator: unknown
Object Type: Report
System: The UNT Digital Library
10"x11.5" Copper Expansion Joints For Main Escape Pipe & 6" Expansion Joint

10"x11.5" Copper Expansion Joints For Main Escape Pipe & 6" Expansion Joint

Blueprint depicting technical details of Battleship Texas.
Date: March 10, 1913
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
11" Bulkhead Steam Valve - Boiler Room

11" Bulkhead Steam Valve - Boiler Room

Blueprint depicting technical details of Battleship Texas.
Date: September 10, 1926
Creator: unknown
Object Type: Technical Drawing
System: The Portal to Texas History
14-Inch Swing Check Valve Test (open access)

14-Inch Swing Check Valve Test

The check valve for the Hallam Power Reactor uses a knife-edge bearing for the flapper in place of the usual journal-type bearing. Mechanical cycling in sodium at 600 deg F was used to check operation of this bearing. A total of 309 mechanical cycles was completed with no apparent malfunctioning of the valve. Measured leskage rates were 0.46 gpm at 0.93 psig, 0.73 gpm at 3.4 psig. and 0.32 gpm at 5.9 psig. (M.C.G.)
Date: February 10, 1960
Creator: Cygan, R.
Object Type: Report
System: The UNT Digital Library
14-MeV Neutron Generator Used as a Thermal Neutron Source (open access)

14-MeV Neutron Generator Used as a Thermal Neutron Source

One of the most important applications of the general purpose Monte Carlo N-Particle (MCNPS and MCNPX) codes is neutron shielding design. We employed this method to simulate the shield of a 14-MeV neutron generator used as a thermal neutron source providing an external thermal neutron beam for testing large area neutron detectors developed for diffraction studies in biology and also useful for national security applications. Nuclear reactors have been the main sources of neutrons used for scientific applications. In the past decade, however, a large number of reactors have been shut down, and the importance of other, smaller devices capable of providing neutrons for research has increased. At Brookhaven National Laboratory a moderated Am-Be neutron source with shielding is used for neutron detector testing. This source is relatively weak, but provides a constant flux of neutrons, even when not in use. The use of a 14 MeV energized neutron generator, with an order of magnitude higher neutron flux has been considered to replace the Am-Be source, but the higher fast neutron yield requires a more careful design of moderator and shielding. In the present paper we describe a proposed shielding configuration based on Monte Carlo calculations, and provide calculated neutron …
Date: August 10, 2008
Creator: Dioszegi, I.
Object Type: Article
System: The UNT Digital Library