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Designing Neutralized Drift Compression for Focusing of Intense Ion Beam Pulses in a Background Plasma

Description: Neutralized drift compression offers an effective method for particle beam focusing and current amplification. In neutralized drift compression, a linear radial and longitudinal velocity drift is applied to a beam pulse, so that the beam pulse compresses as it drifts in the drift-compression section. The beam intensity can increase more than a factor of 100 in both the radial and longitudinal directions, resulting in more than 10,000 times increase in the beam number density during this process… more
Date: April 28, 2009
Creator: Kaganovich, I. D.; Davidson, R. C.; Dorf, M.; Startsev, E. A.; Barnard, J. J.; Friedman, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Critical Issues for High-Brightness Heavy-Ion Beams - Prioritized

Description: This study group was initiated to consider whether there were any "show-stopper" issues with accelerators for heavy-ion warm-dense matter (WDM) and heavy-ion inertial fusion energy (HIF), and to prioritize them. Showstopper issues appear to be categorized as limits to beam current; that is, the beam is expected to e well-behaved below the current limit, and significantly degraded in current or emittance if the current limit is exceeded at some region of an accelerator. We identified 14 issues: … more
Date: January 19, 2007
Creator: Molvik, A. W.; Cohen, R.; Davidson, R.; Faltens, A.; Friedman, A.; Grisham, L. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Toward a physics design for NDCX-II, an ion accelerator for warm dense matter and HIF target physics studies

Description: The Heavy Ion Fusion Science Virtual National Laboratory (HIFS-VNL), a collaborationof LBNL, LLNL, and PPPL, has achieved 60-fold pulse compression of ion beams on the Neutralized Drift Compression eXperiment (NDCX) at LBNL. In NDCX, a ramped voltage pulse from an induction cell imparts a velocity"tilt" to the beam; the beam's tail then catches up with its head in a plasma environment that provides neutralization. The HIFS-VNL's mission is to carry out studies of Warm Dense Matter (WD… more
Date: August 1, 2008
Creator: Friedman, A.; Barnard, J. J.; Briggs, R. J.; Davidson, R. C.; Dorf, M.; Grote, D. P. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Beam dynamics of the Neutralized Drift Compression Experiment-II (NDCX-II), a novel pulse-compressing ion accelerator

Description: Intense beams of heavy ions are well suited for heating matter to regimes of emerging interest. A new facility, NDCX-II, will enable studies of warm dense matter at {approx}1 eV and near-solid density, and of heavy-ion inertial fusion target physics relevant to electric power production. For these applications the beam must deposit its energy rapidly, before the target can expand significantly. To form such pulses, ion beams are temporally compressed in neutralizing plasma; current amplificatio… more
Date: November 19, 2009
Creator: Friedman, A; Barnard, J J; Cohen, R H; Grote, D P; Lund, S M; Sharp, W M et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Critical issues for high-brightness heavy-ion beams- prioritized

Description: This study group was initiated to consider whether there were any ''show-stopper'' issues with accelerators for heavy-ion warm-dense matter (WDM) and heavy-ion inertial fusion energy (HIF), and to prioritize them. Showstopper issues would appear as limits to beam current; that is, the beam would be well-behaved below the current limit, and significantly degraded in current or emittance if the current limit were exceeded at some region of an accelerator. We identified 14 issues: 1-6 could be add… more
Date: February 28, 2007
Creator: Molvik, A. W.; Cohen, R.; Davidson, R.; Faltens, A.; Friedman, A.; Grisham, L. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Methods for Assessing the Impact of Fog Oil Smoke on Availability, Palatability, & Food Quality of Relevant Life Stages of Insects for Threatened and Endangered Species

Description: A methodology for quantifying population dynamics and food source value of insect fauna in areas subjected to fog oil smoke was developed. Our approach employed an environmentally controlled re-circulating wind tunnel outfitted with a high-heat vaporization and re-condensation fog oil generator that has been shown to produce aerosols of comparable chemistry and droplet-size distribution as those of field releases of the smoke. This method provides reproducible exposures of insects under realist… more
Date: April 1, 2007
Creator: Driver, Crystal J.; Strenge, Dennis L.; Su, Yin-Fong; Cullinan, Valerie I.; Herrington, Ricky S.; Saunders, Danielle L. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Accelerator and Ion Beam Tradeoffs for Studies of Warm Dense Matter

Description: One approach for heating a target to ''Warm Dense Matter'' conditions (similar, for example, to the interiors of giant planets or certain stages in Inertial Confinement Fusion targets), is to use intense ion beams as the heating source (see refs.[6] and [7] and references therein for motivation and accelerator concepts). By consideration of ion beam phase space constraints, both at the injector, and at the final focus, and consideration of simple equations of state and relations for ion stoppin… more
Date: May 13, 2005
Creator: Barnard, J. J.; Briggs, R. J.; Callahan, D. A.; Davidson, R. C.; Friedman, A.; Grisham, L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Self-pinched beam transport experiments Relevant to Heavy Ion Driven inertial fusion energy

Description: An attractive feature of the inertial fusion energy (IFE) approach to commercial energy production is that the fusion driver is well separated from the fusion confinement chamber. This ''standoff'' feature means the driver is largely isolated from fusion reaction products. Further, inertial confinement fusion (ICF) target ignition (with modest gain) is now scheduled to be demonstrated at the National Ignition Facility (NIF) using a laser driver system. The NIF program will, to a considerable ex… more
Date: February 6, 1998
Creator: Herrmannsfeldt, W. B.; Bangerter, R. O.; Fessenden, T. J.; Lee, E. P.; Yu, S. S.; Olson, C. L. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Progress in the high current experiment (HCX) February-July 2002

Description: This paper reports progress in the HCX experimental program since the last HIF-VNL Program Advisory Committee Review (February 14-15 2002). On July 25 2002 the experiment was shut down for about four weeks to move the control room. A principal area of effort has been to obtain and evaluate the first experimental results carried out with a matched and well-aligned K+ ion beam transported through 10 electrostatic transport quadrupoles. These are the main results and highlights to date: (1) There … more
Date: September 9, 2002
Creator: Seidl, P. A.; Baca, D.; Bieniosek, F. M.; Bukh, B.; Celata, C. M.; Coorey, A. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Developing the Physics Design for Ndcx-Ii, a Unique Pulse-Compressing Ion Accelerator

Description: The Heavy Ion Fusion Science Virtual National Laboratory(a collaboration of LBNL, LLNL, and PPPL) is using intense ion beams to heat thin foils to the"warm dense matter" regime at<~;; 1 eV, and is developing capabilities for studying target physics relevant to ion-driven inertial fusion energy. The need for rapid target heating led to the development of plasma-neutralized pulse compression, with current amplification factors exceeding 50 now routine on the Neutralized Drift Compres… more
Date: July 20, 2009
Creator: Friedman, A.; Barnard, J. J.; Cohen, R. H.; Grote, D. P.; Lund, S. M.; Sharp, W. M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Beam dynamics of the Neutralized Drift Compression Experiment-II (NDCX-II),a novel pulse-compressing ion accelerator

Description: Intense beams of heavy ions are well suited for heating matter to regimes of emerging interest. A new facility, NDCX-II, will enable studies of warm dense matter at {approx}1 eV and near-solid density, and of heavy-ion inertial fusion target physics relevant to electric power production. For these applications the beam must deposit its energy rapidly, before the target can expand significantly. To form such pulses, ion beams are temporally compressed in neutralizing plasma; current amplificatio… more
Date: December 19, 2009
Creator: Friedman, A.; Barnard, J. J.; Cohen, R. H.; Grote, D. P.; Lund, S. M.; Sharp, W. M. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Accelerator and Ion Beam Tradeoffs for Studies of Warm DenseMatter

Description: One approach for heating a target to ''Warm Dense Matter'' conditions (similar, for example, to the interiors of giant planets or certain stages in inertial confinement fusion targets), is to use intense ion beams as the heating source (see refs.[6] and [7] and references therein for motivation and accelerator concepts). By consideration of ion beam phase-space constraints, both at the injector, and at the final focus, and consideration of simple equations of state and relations for ion stoppin… more
Date: January 30, 2006
Creator: Barnard, J. J.; Briggs, R. J.; Callahan, D. A.; Davidson, R. C.; Friedman, A.; Grisham, L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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NDCX-II, an Induction Linac for HEDP and IFE Research

Description: The Heavy Ion Fusion Science Virtual National Laboratory in the USA is constructing a new Neutralized Drift Compression eXperiment (NDCX-II) at LBNL. This facility is being developed for high energy density physics and inertial fusion energy research. The 12 m long induction linac in NDCX-II will produce a Li{sup +} beam pulse, at energies of 1.2-3 MeV, to heat target material to the warm dense matter regime ({approx} 1 eV). By making use of special acceleration voltage waveforms, 2.5T solenoid… more
Date: April 20, 2011
Creator: Kwan, J. W.; Arbelaez, D.; Bieniosek, F. M.; Faltens, A.; Friedman, A.; Galvin, J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The integrated beam experiment - A next step experiment for heavy ion fusion

Description: The U.S. Heavy Ion Fusion Virtual National Laboratory is proposing as its next experiment the Integrated Beam Experiment (IBX). All experiments in the U.S. Heavy Ion Fusion (HIF) program up to this time have been of modest scale and have studied the physics of selected parts of a heavy ion driver. The mission of the IBX, a proof-of-principle experiment, is to demonstrate in one integrated experiment the transport from source to focus of a single heavy ion beam with driver-relevant parameters--i… more
Date: September 1, 2003
Creator: Celata, C. M.; Kwan, J. W.; Lee, E. P.; Leitner, M. A.; Logan, B. G.; Vay, J. L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ILSE: The next step toward a heavy ion induction accelerator for inertial fusion energy

Description: LBL and LLNL propose to build, at LBL, the Induction Linac Systems Experiments (ILSE), the next logical step towards the eventual goal of a heavy-ion induction accelerator powerful enough to implode or ``drive`` inertial-confinement fusion targets. ILSE, although much smaller than a driver, will be the first experiment at full driver scale in several important parameters. Most notable among these are line charge density and beam cross section. Many other accelerator components and beam manipula… more
Date: July 1, 1992
Creator: Fessenden, T.; Bangerter, R.; Berners, D.; Chew, J.; Eylon, S.; Faltens, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Overview of theory and modeling in the Heavy Ion Fusion Virtual National Laboratory

Description: This paper presents analytical and simulation studies of intense heavy ion beam propagation, including the injection, acceleration, transport and compression phases, and beam transport and focusing in background plasma in the target chamber. Analytical theory and simulations that support the High Current Experiment (HCX), the Neutralized Transport Experiment (NTX), and the advanced injector development program, are being used to provide a basic understanding of the nonlinear beam dynamics and c… more
Date: May 1, 2002
Creator: Davidson, R. C.; Kaganovich, I. D.; Lee, W. W.; Qin, H.; Startsev, E. A.; Tzenov, S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Planning for an Integrated Research Experiment

Description: The authors describe the goals and research program leading to the Heavy Ion Integrated Research Experiment (IRE). They review the basic constraints which lead to a design and give examples of parameters and capabilities of an IRE. We also show design tradeoffs generated by the systems code IBEAM. A multi-pronged Phase 1 research effort is laying the groundwork for the Integrated Research Experiment. Experiment, technology development, theory, simulation, and systems studies are all playing maj… more
Date: September 15, 2000
Creator: Barnard, J. J.; Ahle, L. E.; Bangerter, R. O.; Bieniosek, F. M.; Celata, C. M.; Faltens, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

ILSE: The next step toward a heavy ion induction accelerator for inertial fusion energy

Description: LBL and LLNL propose to build, at LBL, the Induction Linac Systems Experiments (ILSE), the next logical step towards the eventual goal of a heavy-ion induction accelerator powerful enough to implode or drive'' inertial-confinement fusion targets. ILSE, although much smaller than a driver, will be the first experiment at full driver scale in several important parameters. Most notable among these are line charge density and beam cross section. Many other accelerator components and beam manipulati… more
Date: July 1, 1992
Creator: Fessenden, T.; Bangerter, R.; Berners, D.; Chew, J.; Eylon, S.; Faltens, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The Modular Point Design for Heavy Ion Fusion

Description: We report on an ongoing study on modular Heavy Ion Fusion drivers. The modular driver is characterized by 10 to 20 nearly identical induction linacs, each carrying a single high current beam. In this scheme, the Integrated Research Experiment (IRE) can be one of the full size induction linacs. Hence, this approach offers significant advantages in terms of driver development path. For beam transport, these modules use solenoids which are capable of carrying high line charge densities, even at lo… more
Date: September 17, 2004
Creator: Yu, S. S.; Barnard, J. J.; Briggs, R. J.; Callahan, D.; Celata, C. M.; Chao, L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Planning for an integrated research experiment

Description: We describe the goals and research program leading to the Heavy Ion Integrated Research Experiment (IRE). We review the basic constraints which lead to a design and give examples of parameters and capabilities of an IRE. We also show design tradeoffs generated by the systems code IBEAM.
Date: March 25, 2001
Creator: Barnard, J. J.; Ahle, L. E.; Bangerter, R. O.; Bieniosek, F. M.; Celata, C. M.; Faltens, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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