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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
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Hot nuclei -- Landau theory, thermal fluctuations and dissipation

Description: The basic ideas and theoretical methods used in the description of hot nuclei are reviewed. In particular, a macroscopic approach to shape transitions is discussed in the framework of the Landau theory in which the quadrupole shape degrees of freedom play the role of the order parameters. This theory describes the universal features of the nuclear shape evolution with temperature and spin. A unified description of fluctuations in all five quadrupole degrees of freedom is introduced and plays an… more
Date: December 31, 1990
Creator: Alhassid, Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Heavy ion fusion accelerator research (HIFAR) year-end report, April 1, 1991--September 30, 1991

Description: This report discusses the following topics: ion source for the final focusing scaling experiment; reference ILSE physics design; injector and ion source development; the injector matching section; beam merging in ILSE; short quadrupole magnet design; ILSE concept induction cell studies; fast split-harp emittance measurements using a multichannel waveform analyzer; and HIFAR staff roster.
Date: September 1, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The diagnostics system for the multiple heavy ion beams induction linac experiment, MBE-4

Description: MBE-4 is a four beam current amplifying induction linac experiment conducted at LBL as a part of the Heavy Ion Fusion Accelerator Research (HIFAR) program for studying accelerator physics issues of a heavy ion driver for inertial fusion. The four ion beams (Cs{sup +}, 10 mA) are focused by electrostatic quadrupoles and accelerated fro about 200 keV to 900 keV through 24 induction gaps. Current amplification of up to nine times is achieved while the beam pulse duration is compressed from about 3… more
Date: September 1, 1991
Creator: Eylon, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Intimations of Neck Formation in Heavy-Ion Subbarrier Fusion Reactions

Description: Since the observed fusion cross sections for collisions between heavy ions at subbarrier energies are orders of magnitude larger than would be expected for barrier tunnelling, one is faced with the task of identifying the basic force which is strong enough to overcome the strong Coulomb force and bring about fusion. The two possibilities seem to be excursions of the nuclear surface (and strong nuclear force) due to collective motions of the colliding nuclei and formation of a neck of nuclear ma… more
Date: July 1990
Creator: Stelson, P. H.
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
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Progress on a 2-MV injector for a scaled HIF accelerator experiment

Description: A sixteen beam injector to supply 500mA per beam of C/sup +/ ions, which was initially designed and partially constructed at Los Alamos National Laboratory, is under further development at LBL. We report on development work involving single and multiple carbon arc sources. These sources are useful because they can easily supply the 25 mA/cm/sup 2/ needed for the device. They are pulsed sources which do not cause unacceptable background gas loads in the column. We present emittance and reproduci… more
Date: June 1, 1988
Creator: Rutkowski, H. L.; Faltens, A.; Humphries, S., Jr.; Vanecek, D.; Pike, C.; Johnson, R. M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Statistical Description of Orbiting and Fusion

Description: An extension of the diffusion model is proposed for describing the intermediate processes and the compound nucleus formation in heavy ion collisions. The model describes the intermediate processes and fusion in terms of the formation and the evolution of long-lived dinuclear molecular complex (DMC) and its subsequent decay by fragmentation. The colliding ions can be trapped into the pocket of the entrance channel nucleus-nucleus potential and a DMC is formed. This DMC acts as a doorway state to… more
Date: January 1, 1986
Creator: Ayik, S.; Shivakumar, B.; Shapira, D. & Harmon, B. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Transport description of intermediate processes in heavy ion collisions

Description: An extension of the diffusion model is proposed in order to describe the intermediate processes and the compound nucleus formation in heavy ion collisions. The model describes the intermediate processes and fusion in terms of the formation and the evolution of a long-lived dinuclear molecular complex (DMC) and its subsequent decay by fragmentation. The colliding ions can be trapped into the pocket of the entrance channel nucleus-nucleus potential and a DMC is formed. This DMC acts as a doorway … more
Date: January 1, 1986
Creator: Ayik, S.; Shivakumar, B. & Shapira, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Research in theoretical nuclear physics

Description: The work done during the past year covers three separate areas, low energy nuclear reactions intermediate energy physics, and nuclear structure studies. This manuscript summarizes our achievements made in these three areas.
Date: October 1, 1991
Creator: Udagawa, T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Research on ion induction linacs at Berkeley

Description: Since October 1983, most of the research in the US on heavy ion fusion (HIF) has been devoted to the physics and technology of the induction linac driver. The economic viability of the method was confirmed in the recent HIF Systems Assessment. Research at Berkeley comprises three experimental activities: the multiple-beam experiment, MBE-4, which accelerates four parallel, separately focused beams of cesium ions from 0.2 to 1 MeV; amplification of the beam power by a factor of nearly 40 is obse… more
Date: June 1, 1988
Creator: Fessenden, T.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Simulations of Heavy Ion Fusion Beam Compression With Quadrupole Focusing: Development of 3D Capability

Description: Longitudinal beam compression is essential to produce the requisite peak power for driving ICF targets; it could also produce the proper pulse shapes. Realistic effects of quadrupole focusing and displaced beam centroid in the presence of space charge are being studied with the help of the 3D ARGUS particle-in-cell (PIC) code. We discuss the results and code development for these studies.
Date: June 30, 1988
Creator: Mark, J. W. K.; Friedman, A.; Chang, Chia-Lie; Drobot, A. & Mankofsky, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A 2-MV multi-beam injector for heavy ion fusion

Description: Construction of a sixteen beam (0.5 A per beam) injector for use in scaled heavy ion fusion experiments is underway at LBL. The machine was designed and partially constructed at LANL. The injector is designed to use carbon arc sources which will provide 25 mA/cm/sup 2/ of extractable current density. The plasma from the arcs is confined electrostatically from drifting into the ion gun before firing the extraction pulse. The acceleration column consists of a set of aperture lenses which both tra… more
Date: June 1, 1988
Creator: Rutkowski, H. L.; Faltens, A.; Vanecek, D.; Pike, C.; Humphries, S., Jr. & Meyer, E. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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HIF/HIFAR accomplishments: A synopsis (December 1988)

Description: The goal of the HIFAR program is to build a physics and technology data base for high-current introduction linacs using multiple ion beams and current amplification. A central issue is maintaining a low enough 6-D emittance to allow focussing to a small focal spot. High current sources of heavy ions have more than adequate brightness; the single-beam transport experiment established linac transport limits; the multiple-beam experiment amplifies current in four beams; high-voltage injector for 1… more
Date: December 1, 1988
Creator: Keefe, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Applications of large-scale computation to particle accelerators

Description: The rapid growth in the power of large-scale computers has had a revolutionary effect on the study of charged-particle accelerators that is similar to the impact of smaller computers on everyday life. Before an accelerator is built, it is now the absolute rule to simulate every component and subsystem by computer to establish modes of operation and tolerances. We will bypass the important and fruitful areas of control and operation, and consider only application to design and diagnostic interpr… more
Date: May 1, 1991
Creator: Herrmannsfeldt, W.B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Recent Livermore research on ion beam fusion targets

Description: Targets using indirect drive optimize symmetry and are the mainline approach at LLNL based on a number of favorable factors. Recently we have also investigated several examples of ion beam targets that use the energy efficiency of direct drive while at the same time optimizing on the symmetry requirements. Heavy ion beams of charge state Z greater than or equal to 3 at 5-10 GeV have less than or equal to15-20 m bending radii with 3.5 Tesla fields. Beams like them could be used with targets invo… more
Date: August 1, 1988
Creator: Mark, J.W.K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Substantial reductions of input energy and peak power requirements in targets for heavy ion fusion

Description: Two ways of reducing the requirements of the heavy ion driver for inertial confinement fusion (ICF) target implosion are described. Compared to estimates of target gain not using these methods, the target input energy and peak power may be reduced by about a factor of two with the use of the hybrid-implosion concept. Another factor of two reduction in input energy may be obtained with the use of spin-polarized DT fuel in the ICF target.
Date: October 6, 1986
Creator: Mark, J.W.K. & Pan, Y.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Collisions of deformed nuclei and superheavy-element production

Description: A detailed understanding of complete fusion cross sections in heavy-ion collisions requires a consideration of the effects of the deformation of the projectile and target. The aim here is to show that deformation and orientation of the colliding nuclei have a very significant effect on the fusion-barrier height and on the compactness of the touching configuration. To facilitate discussions of fusion configurations of deformed nuclei, the authors develop a classification scheme and introduce a n… more
Date: September 1, 1995
Creator: Iwamoto, Akira; Moeller, P.; Nix, J. R. & Sagawa, Hiroyuki
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The threshold anomaly for heavy-ion scattering

Description: The real parts of optical potentials deduced from heavy-ion scattering measurements become rapidly more attractive as the bombarding energy is reduced close to the top of the Coulomb barrier. This behavior is explained as a coupled-channels effect, and is related to the corresponding reduction in the absorptive potential through a dispersion relation which expresses the consequences of causality. Another manifestation of this ''anomaly'' is the striking enhancement observed for the near- and su… more
Date: January 1, 1987
Creator: Satchler, G.R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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From Simple to Complex Reactions: Nuclear Collisions Near the Coulomb Barrier

Description: Collisions between two heavy nuclei produce a diverse spectrum of reaction modes which is much wider than that observed in light ion studies. For the latter case, two processes are observed: direct reactions and compound nucleus formation. Heavy ion reaction studies on the other hand have identified additional processes such as deep-inelastic scattering, incomplete fusion and quasi-fission reactions. While the boundaries between the various processes are usually not well defined, it is generall… more
Date: January 1, 1992
Creator: Rehm, K. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Induction linac drivers: Prospects for the future

Description: This review is intended to place in perspective our current view of the parameter ranges for induction linac drivers that lead to attractive scenarios for civilian electrical power plants; there is a surprising degree of choice (a factor of two or so in most parameters) before any significant impact on the cost of energy results. The progress and goals of the US Heavy Ion Accelerator Research (HIFAR) program are reviewed. The step between the realization of the HIFAR goals and a full-scale driv… more
Date: June 1, 1988
Creator: Keefe, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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