J. W. Poukey

Sandia National Laboratories California

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M.G. Mazarakis

Sandia National Laboratories California

J.A. Halbleib

Sandia National Laboratories

T. W. L. Sanford

California Polytechnic State University

S.L. Shope

Sandia National Laboratories

C.A. Frost

University of New Mexico

R. C. Mock

n&k Technology (United States)

John R. Freeman

University of Minnesota

J.J. Ramirez

Duke University

T. R. Lockner

Electro Magnetic Applications (United States)

David L. Smith

Australian Research Council

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Sandia National Laboratories

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Sandia National Laboratories California

181

Office of Scientific and Technical Information

Lawrence Livermore National Laboratory

Los Alamos National Laboratory

National Technical Information Service

United States Naval Research Laboratory

n&k Technology (United States)

Radiology Associates of Albuquerque

Pulse Biosciences (United States)

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A study of REB target irradiation, deposition, and implosion

J. Chang L. P. Mix F. C. Perry M. M. Widner J. W. Poukey

Implosion

Deposition

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Comments on “Reverse current induced by injection of a relativistic electron beam into a pinched plasma”

The Physics of Fluids (1974)

J. W. Poukey A. J. Toepfer

First Page

Relativistic electron beam

10.1063/1.1694746

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Citations (3)

Trajectory versus PIC methods in diode design

J. W. Poukey

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Positive polarity voltage adder miti, experiments on helia"'

J.P. Corley C.E. Heath D.L. Johnson S.E. Rosenthal J. W. Poukey

HELIA is a four stage, 4-MV, 250-kA, 30-ns accelerator used to study the design concepts for Hermes III. The accelerator consists of eight pulse forming lines (PFLs) that deliver 1-MV, 125-kA pulses to four linear induction cavities. The cavities are in series. and the voltage addition is accomplished in a coaxial self magnetically insulated transmission line (MITL). A positive polarity experiment has been performed on Hermes Ill that shows efficient current transport through the system. HELIA has been reconfigured for positive polarity operation, and initial experimental results show operation consistent with Hermes Ill results. These experiments are aimed at obtaining a more complete understanding of the system performance in positive polarity and to investigate the interactions of the cavities, adder MITL, and extensions in this configuration. Initial results and details of these tests are presented in this paper.

Polarity (international relations)

Polarity symbols

Coaxial

Line (geometry)

High Voltage

10.1109/ppc.1989.767550

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Citations (12)

Energetic electrons in the Pulselac-C accelerator

T. R. Lockner J. W. Poukey

We have observed energetic electrons (> 400 eV) upstream of a transverse magnetic field barrier (i.e., the insulating magnetic field of an accelerating gap) in the Pulselac-C accelerator. If the barrier is not energized, the peak electron energy drops below 200 eV and the flux is reduced by more than a factor of three. This result indicates that it is the beam interaction with the field that is responsible for generating electrons with large transverse energies. Numerical simulations of this experiment suggest a simple electrostatic basis for these phenomena. 5 references, 11 figures.

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Axially Dependent Equilibria for a Relativistic Electron Beam

Physical Review Letters (1971)

J. W. Poukey A. J. Toepfer J.G. Kelly

Experimental measurements and numerical simulation show that relativistic electron beams propagating in a drift tube with a net current less than the Alfv\'en critical current assume an axially dependent equilibrium. The equilibrium of a 40-kA, 3-MeV electron beam propagating in air at 22.5 Torr has been studied analytically, numerically, and experimentally. Reasonable agreement among the results of the three approaches has been found.

Axial symmetry

Relativistic electron beam

10.1103/physrevlett.26.1620

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Citations (14)

OBSERVATION OF REFLECTED WAVES ON THE SABRE POSITIVE POLARITY INDUCTIVE ADDER MITL

M. E. Cuneo J. W. Poukey C. W. Mendel S.E. Rosenthal D. L. Hanson

Polarity (international relations)

Polarity symbols

10.1109/ppc.1993.513365

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Citations (10)

Radial oscillations of a relativistic electron beam in an accelerating gap

Journal of Applied Physics (1981)

T. C. Genoni M. R. Franz B. G. Epstein Robert B. Miller J. W. Poukey

Radial oscillations of hollow, relativistic electron beams have been observed on Sandia’s RADLAC I, a multistage high-current linear induction accelerator. These oscillations, which arise because the presence of the accelerating gaps prevents radial force balance, can be responsible for poor beam quality and low current-transport efficiency. The method of magnetic field shaping to suppress oscillations is investigated. Two analytical models are formulated to derive nonuniform fields necessary to maintain force balance in a single-gap geometry. Particle code simulations have been made to test beam propagation in contoured fields. Field shaping does suppress oscillations and is not sensitive to fluctuations in beam and gap parameters.

Relativistic electron beam

Oscillation (cell signaling)

10.1063/1.329063

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Citations (12)

RADLAC II High Current Electron Beam

C.A. Frost S.L. Shope K. W. Struve R.L. Feinstein M.G. Mazarakis

10.1109/plasma.1991.695513

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Collective Acceleration Investigations with the Ionization Front Accelerator

IEEE Transactions on Nuclear Science (1977)

C. L. Olson J. W. Poukey J. Pace VanDevender A. Owyoung Jay Pearlman

Part I of a three part program to demonstrate feasibility of the Ionization Front Accelerator (IFA) has been completed, and is successful. Experiments describing intense relativistic electron beam (IREB) propagation in Cs are reported. The threshold pressure for electron beam ionization of Cs is found to agree with earlier theoretical predictions. These results experimentally establish Cs as a feasible working gas for the IFA. Numerical simulation results are also reported which demonstrate controlled potential well motion and collective ion acceleration with the IFA.

10.1109/tns.1977.4329043

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Citations (9)