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Halo Formation And Emittance Growth of Positron Beams in Plasmas

Description: An ultrarelativistic 28.5 GeV, 700-{micro}m-long positron bunch is focused near the entrance of a 1.4-m-long plasma with a density n{sub e} between {approx}10{sup 13} and {approx}5 x 10{sup 14} cm{sup -3}. Partial neutralization of the bunch space charge by the mobile plasma electrons results in a reduction in transverse size by a factor of {approx}3 in the high emittance plane of the beam {approx}1 m downstream from the plasma exit. As n{sub e} increases, the formation of a beam halo containin… more
Date: October 25, 2011
Creator: Muggli, P.; Blue, B. E.; Clayton, C. E.; Decker, F. J.; Hogan, M. J.; Huang, C. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Performance Validation and Scaling of a Capillary Membrane Solid-Liquid Separation System

Description: Algaeventure Systems (AVS) has previously demonstrated an innovative technology for dewatering algae slurries that dramatically reduces energy consumption by utilizing surface physics and capillary action. Funded by a $6M ARPA-E award, transforming the original Harvesting, Dewatering and Drying (HDD) prototype machine into a commercially viable technology has required significant attention to material performance, integration of sensors and control systems, and especially addressing scaling iss… more
Date: October 25, 2011
Creator: Rogers, S.; Cook, J.; Juratovac, J.; Goodwillie, J.; Burke, T. & Stuart, B., ed.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Design Calculations For NIF Convergent Ablator Experiments

Description: The NIF convergent ablation tuning effort is underway. In the early experiments, we have discovered that the design code simulations over-predict the capsule implosion velocity and shock flash rhor, but under-predict the hohlraum x-ray flux measurements. The apparent inconsistency between the x-ray flux and radiography data implies that there are important unexplained aspects of the hohlraum and/or capsule behavior.
Date: October 25, 2011
Creator: Olson, R E; Hicks, D G; Meezan, N B; Callahan, D A; Landen, O L; Jones, O S et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Ignition Capsules with Aerogel-Supported Liquid DT Fuel For The National Ignition Facility

Description: For high repetition-rate fusion power plant applications, capsules with aerogel-supported liquid DT fuel can have much reduced fill time compared to {beta}-layering a solid DT fuel layer. The melting point of liquid DT can be lowered once liquid DT is embedded in an aerogel matrix, and the DT vapor density is consequently closer to the desired density for optimal capsule design requirement. We present design for NIF-scale aerogel-filled capsules based on 1-D and 2-D simulations. An optimal conf… more
Date: October 25, 2011
Creator: Ho, D D; Salmonson, J D; Clark, D S; Lindl, J D; Haan, S W; Amendt, P et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

SLUDGE BATCH 7B GLASS VARIABILITY STUDY

Description: The Defense Waste Processing Facility (DWPF) is preparing to initiate processing Sludge Batch 7b (SB7b). In support of the upcoming processing, the Savannah River National Laboratory (SRNL) provided a recommendation to utilize Frits 418 with a 6% Na{sub 2}O addition (26 wt% Na{sub 2}O in sludge) and 702 with a 4% Na{sub 2}O addition (24 wt% Na{sub 2}O in sludge) to process SB7b. This recommendation was based on assessments of the compositional projections for SB7b available at the time from the… more
Date: October 25, 2011
Creator: Johnson, F. & Edwards, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

MCNP5 CALCULATIONS REPLICATING ARH-600 NITRATE DATA

Description: This report serves to extend the previous document: 'MCNP Calculations Replicating ARH-600 Data' by replicating the nitrate curves found in ARH-600. This report includes the MCNP models used, the calculated critical dimension for each analyzed parameter set, and the resulting data libraries for use with the CritView code. As with the ARH-600 data, this report is not meant to replace the analysis of the fissile systems by qualified criticality personnel. The M CNP data is presented without accou… more
Date: October 25, 2011
Creator: Finfrock, S. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Final Report on Subcontract B591217: Multigrid Methods for Systems of PDEs

Description: Progress is summarized in the following areas of study: (1) Compatible relaxation; (2) Improving aggregation-based MG solver performance - variable cycle; (3) First Order System Least Squares (FOSLS) for LQCD; (4) Auxiliary space preconditioners; (5) Bootstrap algebraic multigrid; and (6) Practical applications of AMG and fast auxiliary space preconditioners.
Date: October 25, 2011
Creator: Xu, J.; Brannick, J. J. & Zikatanov, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Solar Projects: DOE Section 1705 Loan Guarantees

Description: This report discusses the solar energy initiative and the political implications. The objective of this report is to provide Congress with insight regarding solar projects supported by Department of Energy (DOE’s) loan guarantee program, the risk characteristics of these projects, and how other DOE loan guarantee projects are either similar to or different from the Solyndra solar manufacturing project.
Date: October 25, 2011
Creator: Brown, Phillip
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Access to Broadband Networks: The Net Neutrality Debate

Description: This report discusses the current debate over "net neutrality." While there is no single accepted definition of "net neutrality," most agree that any such definition should include the general principles that owners of the networks that compose and provide access to the Internet should not control how consumers lawfully use that network, and they should not be able to discriminate against content provider access to that network.
Date: October 25, 2011
Creator: Gilroy, Angele A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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