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in creator/contributor: "Lee, E."  
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Efficient computation of matched solutions of the KV envelope equations for periodic focusing lattices.

Description: A new iterative method is developed to numerically calculate the periodic, matched beam envelope solution of the coupled Kapchinskij-Vladimirskij (KV) equations describing the transverse evolution of a beam in a periodic, linear focusing lattice of arbitrary complexity. Implementation of the method is straightforward. It is highly convergent and can be applied to all usual parameterizations of the matched envelope solutions. The method is applicable to all classes of linear focusing lattices wi… more
Date: January 17, 2006
Creator: Lund, S M; Chilton, S H & Lee, E P
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Recent U.S. advances in ion-beam-driven high energy densityphysics and heavy ion fusion

Description: During the past two years, significant experimental and theoretical progress has been made in the US heavy ion fusion science program in longitudinal beam compression, ion-beam-driven warm dense matter, beam acceleration, high brightness beam transport; and advanced theory and numerical simulations. Innovations in longitudinal compression of intense ion beams by > 50 X propagating through background plasma enable initial beam target experiments in warm dense matter to begin within the next t… more
Date: July 5, 2006
Creator: Logan, B. G.; Bieniosek, F. M.; Celata, C. M.; Coleman, J.; Greenway, W.; Henestroza, E. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Optical Properties in Non-equilibrium Phase Transitions

Description: An open question about the dynamical behavior of materials is how phase transition occurs in highly non-equilibrium systems. One important class of study is the excitation of a solid by an ultrafast, intense laser. The preferential heating of electrons by the laser field gives rise to initial states dominated by hot electrons in a cold lattice. Using a femtosecond laser pump-probe approach, we have followed the temporal evolution of the optical properties of such a system. The results show inte… more
Date: January 5, 2006
Creator: Ao, T; Ping, Y; Widmann, K; Price, D F; Lee, E; Tam, H et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

DETONATION PRESSURE MEASUREMENTS ON PETN

Description: PETN is widely recognized as an example of nearly ideal detonation performance. The chemical composition is such that little or no carbon is produced in the detonation products. The reaction zone width is less than currently detectable. (<1 ns) Observations on PETN have thus become a baseline for EOS model predictions. It has therefore become important to characterize the detonation parameters as accurately as possible in order to provide the most exacting comparisons of EOS predictions with… more
Date: June 23, 2006
Creator: Green, L. G. & Lee, E. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

APPLICATION OF THE EMBEDDED FIBER OPTIC PROBE IN HIGH EXPLOSIVE DETONATION STUDIES: PBX-9502 AND LX-17

Description: The Embedded Fiber Optic probe directly measures detonation speed continuously in time, without the need to numerically differentiate data, and is a new tool for measuring time-dependent as well as steady detonation speed to high accuracy. It consists of a custom-design optical fiber probe embedded in high explosive. The explosive is detonated and a refractive index discontinuity is produced in the probe at the location of the detonation front by the compression of the detonation. Because this … more
Date: September 26, 2006
Creator: Hare, D; Goosman, D; Lorenz, K & Lee, E
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Electron Production and Collective Field Generation in Intense Particle Beams

Description: Electron cloud effects (ECEs) are increasingly recognized as important, but incompletely understood, dynamical phenomena, which can severely limit the performance of present electron colliders, the next generation of high-intensity rings, such as PEP-II upgrade, LHC, and the SNS, the SIS 100/200, or future high-intensity heavy ion accelerators such as envisioned in Heavy Ion Inertial Fusion (HIF). Deleterious effects include ion-electron instabilities, emittance growth, particle loss, increase … more
Date: February 9, 2006
Creator: Molvik, A W; Vay, J; Cohen, R; Friedman, A; Lee, E; Verboncoeur, J 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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