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Shock timing on the National Ignition Facility: the first precision tuning series
Ignition implosions on the National Ignition Facility (NIF) [Lindl et al., Phys. Plasmas 11, 339 (2004)] are driven with a very carefully tailored sequence of four shock waves that must be timed to very high precision in order to keep the fuel on a low adiabat. The first series of precision tuning experiments on NIF have been performed. These experiments use optical diagnostics to directly measure the strength and timing of all four shocks inside the hohlraum-driven, cryogenic deuterium-filled capsule interior. The results of these experiments are presented demonstrating a significant decrease in the fuel adiabat over previously un-tuned implosions. The impact of the improved adiabat on fuel compression is confirmed in related deuterium-tritium (DT) layered capsule implosions by measurement of fuel areal density (rR), which show the highest fuel compression (rR {approx} 1.0 g/cm{sup 2}) measured to date.
Date:
October 27, 2011
Creator:
Robey, H. F.; Celliers, P. M.; Kline, J. L. & Mackinnon, A. J.
Object Type:
Article
System:
The UNT Digital Library
82nd Texas Legislature, Regular Session, Senate Bill 198, Chapter 134
Bill introduced by the Texas Senate relating to exempting persons who are convicted of certain sexual offenses from registering as a sex offender in this state.
Date:
May 27, 2011
Creator:
Texas. Legislature. Senate.
Object Type:
Legislative Document
System:
The Portal to Texas History
82nd Texas Legislature, Regular Session, Senate Bill 250, Chapter 135
Bill introduced by the Texas Senate relating to protective orders for stalking victims.
Date:
May 27, 2011
Creator:
Texas. Legislature. Senate.
Object Type:
Legislative Document
System:
The Portal to Texas History
82nd Texas Legislature, Regular Session, Senate Bill 279, Chapter 136
Bill introduced by the Texas Senate relating to inclusion of pets and other companion animals in protective orders; providing a penalty.
Date:
May 27, 2011
Creator:
Texas. Legislature. Senate.
Object Type:
Legislative Document
System:
The Portal to Texas History
82nd Texas Legislature, Regular Session, House Joint Resolution 109
Joint resolution introduced by the Texas House of Representatives and Senate proposing a constitutional amendment to clarify references to the permanent school fund, to allow the General Land Office to distribute revenue derived from permanent school fund land or other properties to the available school fund, and to provide for an increase in the market value of the permanent school fund for the purpose of allowing increased distributions from the available school fund.
Date:
May 27, 2011
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
82nd Texas Legislature, Regular Session, Senate Bill 14, Chapter 123
Bill introduced by the Texas Senate relating to requirements to vote, including presenting proof of identification; providing criminal penalties.
Date:
May 27, 2011
Creator:
Texas. Legislature. Senate.
Object Type:
Legislative Document
System:
The Portal to Texas History
82nd Texas Legislature, Regular Session, House Bill 2375, Chapter 131
Bill introduced by the Texas House of Representatives relating to practices and professions regulated by the Texas Appraiser Licensing and Certification Board.
Date:
May 27, 2011
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
The Greensheet (Houston, Tex.), Vol. 42, No. 203, Ed. 1 Friday, May 27, 2011
Free weekly newspaper that includes business and classified advertising.
Date:
May 27, 2011
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Fort Worth, Tex.), Vol. 34, No. 299, Ed. 1 Thursday, January 27, 2011
Free weekly newspaper that includes business and classified advertising.
Date:
January 27, 2011
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Houston, Tex.), Vol. 42, No. 161, Ed. 1 Thursday, October 27, 2011
Free weekly newspaper that includes business and classified advertising.
Date:
October 27, 2011
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Houston, Tex.), Vol. 41, No. 617, Ed. 1 Thursday, January 27, 2011
Free weekly newspaper that includes business and classified advertising.
Date:
January 27, 2011
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Fort Worth, Tex.), Vol. 35, No. 207, Ed. 1 Thursday, October 27, 2011
Free weekly newspaper that includes business and classified advertising.
Date:
October 27, 2011
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Dallas, Tex.), Vol. 35, No. 113, Ed. 1 Wednesday, July 27, 2011
Free weekly newspaper that includes business and classified advertising.
Date:
July 27, 2011
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Fort Worth, Tex.), Vol. 35, No. 208, Ed. 1 Thursday, October 27, 2011
Free weekly newspaper that includes business and classified advertising.
Date:
October 27, 2011
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Arlington-Grand Prairie, Tex.), Vol. 35, No. 206, Ed. 1 Thursday, October 27, 2011
Free weekly newspaper that includes business and classified advertising.
Date:
October 27, 2011
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Arlington-Grand Prairie, Tex.), Vol. 34, No. 297, Ed. 1 Thursday, January 27, 2011
Free weekly newspaper that includes business and classified advertising.
Date:
January 27, 2011
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Fort Worth, Tex.), Vol. 34, No. 298, Ed. 1 Thursday, January 27, 2011
Free weekly newspaper that includes business and classified advertising.
Date:
January 27, 2011
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
FRMAC Interactions During a Radiological or Nuclear Event
During a radiological or nuclear event of national significance the Federal Radiological Emergency Monitoring and Assessment Center (FRMAC) assists federal, state, tribal, and local authorities by providing timely, high-quality predictions, measurements, analyses and assessments to promote efficient and effective emergency response for protection of the public and the environment from the consequences of such an event.
Date:
January 27, 2011
Creator:
Wong, C T
Object Type:
Article
System:
The UNT Digital Library
High-Intensity Proton Accelerator
Analysis is presented for an eight-cavity proton cyclotron accelerator that could have advantages as compared with other accelerators because of its potentially high acceleration gradient. The high gradient is possible since protons orbit in a sequence of TE111 rotating mode cavities of equally diminishing frequencies with path lengths during acceleration that greatly exceed the cavity lengths. As the cavities operate at sequential harmonics of a basic repetition frequency, phase synchronism can be maintained over a relatively wide injection phase window without undue beam emittance growth. It is shown that use of radial vanes can allow cavity designs with significantly smaller radii, as compared with simple cylindrical cavities. Preliminary beam transport studies show that acceptable extraction and focusing of a proton beam after cyclic motion in this accelerator should be possible. Progress is also reported on design and tests of a four-cavity electron counterpart accelerator for experiments to study effects on beam quality arising from variations injection phase window width. This device is powered by four 500-MW pulsed amplifiers at 1500, 1800, 2100, and 2400 MHz that provide phase synchronous outputs, since they are driven from a with harmonics derived from a phase-locked 300 MHz source.
Date:
December 27, 2011
Creator:
Hirshfield, Jay L.
Object Type:
Report
System:
The UNT Digital Library
Developing extensible lattice-Boltzmann simulationsfor general-purpose graphics-programming units
Lattice-Boltzmann methods are versatile numerical modeling techniques capable of reproducing a wide variety of fluid-mechanical behavior. These methods are well suited to parallel implementation, particularly on the single-instruction multiple data (SIMD) parallel processing environments found in computer graphics processing units (GPUs). Although more recent programming tools dramatically improve the ease with which GPU programs can be written, the programming environment still lacks the flexibility available to more traditional CPU programs. In particular, it may be difficult to develop modular and extensible programs that require variable on-device functionality with current GPU architectures. This paper describes a process of automatic code generation that overcomes these difficulties for lattice-Boltzmann simulations. It details the development of GPU-based modules for an extensible lattice-Boltzmann simulation package - LBHydra. The performance of the automatically generated code is compared to equivalent purpose written codes for both single-phase, multiple-phase, and multiple-component flows. The flexibility of the new method is demonstrated by simulating a rising, dissolving droplet in a porous medium with user generated lattice-Boltzmann models and subroutines.
Date:
October 27, 2011
Creator:
Walsh, S C & Saar, M O
Object Type:
Article
System:
The UNT Digital Library
Electron Beam Charge Diagnostics for Laser Plasma Accelerators
A comprehensive study of charge diagnostics is conducted to verify their validity for measuring electron beams produced by laser plasma accelerators (LPAs). First, a scintillating screen (Lanex) was extensively studied using subnanosecond electron beams from the Advanced Light Source booster synchrotron, at the Lawrence Berkeley National Laboratory. The Lanex was cross calibrated with an integrating current transformer (ICT) for up to the electron energy of 1.5 GeV, and the linear response of the screen was confirmed for charge density and intensity up to 160 pC/mm{sup 2} and 0.4 pC/(ps mm{sup 2}), respectively. After the radio-frequency accelerator based cross calibration, a series of measurements was conducted using electron beams from an LPA. Cross calibrations were carried out using an activation-based measurement that is immune to electromagnetic pulse noise, ICT, and Lanex. The diagnostics agreed within {+-}8%, showing that they all can provide accurate charge measurements for LPAs.
Date:
June 27, 2011
Creator:
Nakamura, Kei; Gonsalves, Anthony; Lin, Chen; Smith, Alan; Rodgers, David; Donahue, Rich et al.
Object Type:
Article
System:
The UNT Digital Library
Development of an Ontology-Directed Signal Processing Toolbox
This project was focused on the development of tools for the automatic configuration of signal processing systems. The goal is to develop tools that will be useful in a variety of Government and commercial areas and useable by people who are not signal processing experts. In order to get the most benefit from signal processing techniques, deep technical expertise is often required in order to select appropriate algorithms, combine them into a processing chain, and tune algorithm parameters for best performance on a specific problem. Therefore a significant benefit would result from the assembly of a toolbox of processing algorithms that has been selected for their effectiveness in a group of related problem areas, along with the means to allow people who are not signal processing experts to reliably select, combine, and tune these algorithms to solve specific problems. Defining a vocabulary for problem domain experts that is sufficiently expressive to drive the configuration of signal processing functions will allow the expertise of signal processing experts to be captured in rules for automated configuration. In order to test the feasibility of this approach, we addressed a lightning classification problem, which was proposed by DOE as a surrogate for problems encountered …
Date:
May 27, 2011
Creator:
Lang, Stephen W.
Object Type:
Report
System:
The UNT Digital Library
RESULTS OF CESIUM MASS TRANSFER TESTING FOR NEXT GENERATION SOLVENT WITH HANFORD WASTE SIMULANT AP-101
SRNL has performed an Extraction, Scrub, Strip (ESS) test using the next generation solvent and AP-101 Hanford Waste simulant. The results indicate that the next generation solvent (MG solvent) has adequate extraction behavior even in the face of a massive excess of potassium. The stripping results indicate poorer behavior, but this may be due to inadequate method detection limits. SRNL recommends further testing using hot tank waste or spiked simulant to provide for better detection limits. Furthermore, strong consideration should be given to performing an actual waste, or spiked waste demonstration using the 2cm contactor bank. The Savannah River Site currently utilizes a solvent extraction technology to selectively remove cesium from tank waste at the Multi-Component Solvent Extraction unit (MCU). This solvent consists of four components: the extractant - BoBCalixC6, a modifier - Cs-7B, a suppressor - trioctylamine, and a diluent, Isopar L{trademark}. This solvent has been used to successfully decontaminate over 2 million gallons of tank waste. However, recent work at Oak Ridge National Laboratory (ORNL), Argonne National Laboratory (ANL), and Savannah River National Laboratory (SRNL) has provided a basis to implement an improved solvent blend. This new solvent blend - referred to as Next Generation Solvent (NGS) - …
Date:
September 27, 2011
Creator:
Peters, T.; Washington, A. & Fink, S.
Object Type:
Report
System:
The UNT Digital Library
ALUMINUM REMOVAL FROM HANFORD WASTE BY LITHIUM HYDROTALCITE PRECIPITATION - LABORATORY SCALE VALIDATION ON WASTE SIMULANTS TEST REPORT
To reduce the additional sodium hydroxide and ease processing of aluminum bearing sludge, the lithium hydrotalcite (LiHT) process has been invented by AREV A and demonstrated on a laboratory scale to remove alumina and regenerate/recycle sodium hydroxide prior to processing in the WTP. The method uses lithium hydroxide (LiOH) to precipitate sodium aluminate (NaAI(OH){sub 4}) as lithium hydrotalcite (Li{sub 2}CO{sub 3}.4Al(OH){sub 3}.3H{sub 2}O) while generating sodium hydroxide (NaOH). In addition, phosphate substitutes in the reaction to a high degree, also as a filterable solid. The sodium hydroxide enriched leachate is depleted in aluminum and phosphate, and is recycled to double-shell tanks (DSTs) to leach aluminum bearing sludges. This method eliminates importing sodium hydroxide to leach alumina sludge and eliminates a large fraction of the total sludge mass to be treated by the WTP. Plugging of process equipment is reduced by removal of both aluminum and phosphate in the tank wastes. Laboratory tests were conducted to verify the efficacy of the process and confirm the results of previous tests. These tests used both single-shell tank (SST) and DST simulants.
Date:
January 27, 2011
Creator:
T, SAMS & K, HAGERTY
Object Type:
Report
System:
The UNT Digital Library