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Flat Field Anomalies in an X-ray CCD Camera Measured Using a Manson X-ray Source (HTPD 08 paper)

Description: The Static X-ray Imager (SXI) is a diagnostic used at the National Ignition Facility (NIF) to measure the position of the X-rays produced by lasers hitting a gold foil target. The intensity distribution taken by the SXI camera during a NIF shot is used to determine how accurately NIF can aim laser beams. This is critical to proper NIF operation. Imagers are located at the top and the bottom of the NIF target chamber. The CCD chip is an X-ray sensitive silicon sensor, with a large format array (… more
Date: April 28, 2008
Creator: Haugh, M & Schneider, M B
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

New Fragment Separation Technology for Superheavy Element Research

Description: This project consisted of three major research areas: (1) development of a solid Pu ceramic target for the MASHA separator, (2) chemical separation of nuclear decay products, and (3) production of new isotopes and elements through nuclear reactions. There have been 16 publications as a result of this project, and this collection of papers summarizes our accomplishments in each of the three areas of research listed above. The MASHA (Mass Analyzer for Super-Heavy Atoms) separator is being constru… more
Date: January 28, 2008
Creator: Shaughnessy, D A; Moody, K J; Henderson, R A; Kenneally, J M; Landrum, J H; Lougheed, R W et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Using the Nova target chamber for high-yield targets

Description: The existing 2.2-m-radius Nova aluminum target chamber, coated and lined with boron-seeded carbon shields, is proposed for use with 1000-MJ-yield targets in the next laser facility. The laser beam and diagnostic holes in the target chamber are left open and the desired 10/sup -2/ Torr vacuum is maintained both inside and outside the target chamber; a larger target chamber room is the vacuum barrier to the atmosphere. The hole area available is three times that necessary to maintain a maximum fl… more
Date: September 28, 1987
Creator: Pitts, J.H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

HYLIFE-II reactor chamber mechanical design: Update

Description: Mechanical design features of the reactor chamber for the HYLIFE-II inertial confinement fusion power plant are presented. A combination of oscillating and steady, molten salt streams (Li{sub 2}BeF{sub 4}) are used for shielding and blast protection of the chamber walls. The system is designed for a 6 Hz repetition rate. Beam path clearing, between shots, is accomplished with the oscillating flow. The mechanism for generating the oscillating streams is described. A design configuration of the v… more
Date: October 28, 1992
Creator: House, P. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Neutron Skyshine Considerations For The NIF Shielding Design

Description: A series of coupled neutron-photon transport Monte-Carlo calculations was performed to estimate the roof shielding required to limit the skyshine dose to less than 1 mrem/y at the site boundary when conducting DT experiments with annual fusion yields up to 1200 MJ (4.2E20 neutrons/y). The NIF shielding design consists of many different components. The basic components include 10-cm-thick Al chamber with 40-cm-thick target chamber gunite shield having multiple penetrations, 1.83-m-thick concrete… more
Date: January 28, 2004
Creator: Singh, M S; Mecozzi, J M & Tobin, M T
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Effects On Beam Alignment Due To Neutron-Irradiated CCD Images At The National Ignition Facility

Description: The 192 laser beams in the National Ignition Facility (NIF) are automatically aligned to the target-chamber center using images obtained through charged coupled device (CCD) cameras. Several of these cameras are in and around the target chamber during an experiment. Current experiments for the National Ignition Campaign are attempting to achieve nuclear fusion. Neutron yields from these high energy fusion shots expose the alignment cameras to neutron radiation. The present work explores modelin… more
Date: February 28, 2011
Creator: Awwal, A.; Manuel, A.; Datte, P. & Burkhart, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Heavy Ion Inertial Fusion Energy: Summaries of Program Elements

Description: The goal of the Heavy Ion Fusion (HIF) Program is to apply high-current accelerator technology to IFE power production. Ion beams of mass {approx}100 amu and kinetic energy {>=} 1 GeV provide efficient energy coupling into matter, and HIF enjoys R&D-supported favorable attributes of: (1) the driver, projected to be robust and efficient; see 'Heavy Ion Accelerator Drivers.'; (2) the targets, which span a continuum from full direct to full indirect drive (and perhaps fast ignition), and ha… more
Date: February 28, 2011
Creator: Friedman, A; Barnard, J J; Kaganovich, I; Seidl, P A; Briggs, R J; Faltens, A et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Shielding analysis for a heavy ion beam chamber with plasma channels for ion transport

Description: Neutronics analysis has been performed to assess the shielding requirements for the insulators and final focusing magnets in a modified HYLIFE-II target chamber that utilizes pre-formed plasma channels for heavy ion beam transport. Using 65 cm thick Flibe jet assemblies provides adequate shielding for the electrical insulator units. Additional shielding is needed in front of the final focusing superconducting quadrupole magnets. A shield with a thickness varying between 45 and 90 cm needs to be… more
Date: June 28, 2000
Creator: Sawan, M. E.; Peterson, R. R. & Yu, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Production of beams of neutron-rich nuclei between Ca and Ni using the ion-guide technique

Description: Since several elements between Z = 20-28 are refractory in their nature, their neutron-rich isotopes are rarely available as low energy Radioactive Ion Beams (RIB) in ordinary Isotope Separator On-Line facilities [1-4]. These low energy RIBs would be especially interesting to have available under conditions which allow high-resolution beta-decay spectroscopy, ion-trapping and laser-spectroscopy. As an example, availability of these beams would open a way for research which could produce interes… more
Date: September 28, 2004
Creator: Perajarvi, K.; Cerny, J.; Hager, U.; Hakala, J.; Huikari, J.; Jokinen, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Fielding the NIF Cryogenic Ignition Target

Description: The United States Department of Energy has embarked on a campaign to conduct credible fusion ignition experiments on the National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory in 2010. The target assembly specified for this campaign requires the formation of a deuterium/tritium (DT) fuel ice layer on the inside of a 2 millimeter diameter capsule positioned at the center of a 9 millimeter long by 5 millimeter diameter cylinder, called a hohlraum. The ice layer requires mi… more
Date: February 28, 2008
Creator: Malsbury, Terry; Haid, Ben; Gibson, Chuck; Atkinson, Dennis; Skulina, Ken; Klingmann, Jeffrey et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Janus Intense Short Pulse (ISP), the Next Ultrahigh Intensity Laser at LLNL

Description: The Janus ISP upgrade is being developed at LLNL to provide a high-energy (hundreds of Joules) short duration (0.5 to 200 ps) laser pulse with variable delay from a second high-energy (up to 1kJ) long duration (0.2 to 20 ns) laser pulse on target. A new target chamber will allow the angle between the long and short pulse beams to be varied from about 35 to near 180 degrees. Commissioning of the system will begin in the summer of 2005.
Date: September 28, 2004
Creator: Caird, J A; Bonlie, J D; Britten, J A; Cross, R R; Ebbers, C A; Eckart, M J et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Examination of irradiated 304L stainless steel to 6061-T6 aluminum inertia welded transition joints after irradiation in a spallation neutron

Description: The Savannah River Technology Center (SRTC) designed and fabricated tritium target/blanket assemblies which were irradiated for six months at the Los Alamos Neutron Science Center (LANSCE). Cooling water was supplied to the assemblies through 1 inch diameter 304L Stainless Steel (SS) tubing. To attach the 304L SS tubing to the modules a 304L SS to 6061-T6 Aluminum (Al) inertia welded transition joint was used. These SS/Al inertia weld transition joints simulate expected transition joints in the… more
Date: April 28, 2000
Creator: Dunn, K.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

3D finite-difference frequency-domain code for electromagnetic induction tomography

Description: The effect of shrapnel on target chamber components and experiments at large lasers such as the National Ignition Facility at LLNL and the Megajoule Laser at CESTA in France is an important issue in fielding targets and exposure samples. Modeling calculations are likely to be an important component of this effort. Some work in this area has been performed by French workers, who are collaborating with the LLNL on many issues relating to target chamber, experiment-component, and diagnostics survi… more
Date: July 28, 1999
Creator: Berryman, J. G.; Champagne, N. J., II & Buettner, H. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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