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Plasma Science, IEEE Transactions on

Issue 2 • Date April 1987

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Displaying Results 1 - 25 of 26
  • Table of contents

    Publication Year: 1987 , Page(s): c1
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  • IEEE Transactions on Plasma Science

    Publication Year: 1987 , Page(s): c2
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  • Guest Editorial Introduction to the Special Issue on Plasma-Based High-Energy Accelerators

    Publication Year: 1987 , Page(s): 85 - 87
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  • On Beat Wave Excitation of Relativistic Plasma Waves

    Publication Year: 1987 , Page(s): 88 - 106
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (3535 KB)  

    The beat wave excitation process is examined analytically in the Eulerian fluid description. The effects of plasma drifts, harmonics, pump rise time, frequency mismatch, phenomenological damping, plasma inhomogeneities, and two dimensions are discussed. The consistency between the Eulerian and Lagrangian fluid descriptions is verified. View full abstract»

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  • Electrostatic Mode Coupling of Beat-Excited Electron Plasma Waves

    Publication Year: 1987 , Page(s): 107 - 130
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    The process of beat excitation of electron plasma waves in a plasma containing a density ripple is studied theoretically, experimentally, and computationally. A simple theoretical model has been developed which, for modest experimental parameters, predicts a new beat wave saturation mechanism. This mechanism involves the excitation of a spectrum of secondary electrostatic modes which divert pump e... View full abstract»

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  • Temporal Energy Cascading in the Beat Wave Accelerator

    Publication Year: 1987 , Page(s): 131 - 133
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (535 KB)  

    A preliminary analytic study of the temporal evolution of the beat wave accelerator (BWA) has been conducted. It was found that while energy cascading is crucial to the interpretation of current simulations, it will be less important in an actual device where the existing simple fluid model will be adequate. View full abstract»

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  • Beat Wave Generation of Plasma Waves for Particle Acceleration

    Publication Year: 1987 , Page(s): 134 - 144
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    The space-time evolution of beat wave generation is studied analytically and numerically. Electromagnetic cascading, collisional damping and relativistic frequency shift of the beat plasmon are taken into account in the model. In particular, detuning and dispersion effects are investigated. The achievable plasmon amplitude depends strongly on the collisional damping. At low electron temperatures, ... View full abstract»

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  • Relativistic Self-Focusing of Short-Pulse Radiation Beams in Plasmas

    Publication Year: 1987 , Page(s): 145 - 153
    Cited by:  Papers (15)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1566 KB)  

    An envelope equation is derived which describes the radial evolution of a radiation beam propagating through a plasma. The radiation envelope equation contains a defocusing term due to diffraction spreading and a focusing term due to relativistic oscillations of the plasma electrons. The case of a constant density background plasma is analyzed in detail and an expression for a critical laser power... View full abstract»

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  • Laser Self-Trapping for the Plasma Fiber Accelerator

    Publication Year: 1987 , Page(s): 154 - 160
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1215 KB)  

    A short-pulsed intense laser is injected into an underdense plasma to sustain a self-trapped photon channel. With either high-enough intensity or strong-enough focusing the optical beam causes total electron evacuation on the beam axis. Under appropriate conditions this laser and plasma fiber system can provide a slow wave structure of the electromagnetic wave that is suitable for high-energy acce... View full abstract»

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  • Generation of Uniform Plasmas for Beat Wave Experiments

    Publication Year: 1987 , Page(s): 161 - 166
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2584 KB)  

    The laser plasma "beat wave" mechanism for the generation of ultrahigh electric fields requires plasmas of several meters length with density uniformity of about 1 percent. Multiphoton ionization of molecular hydrogen gas at a pressure of a few torr provides a scalable mechanism for generating these plasmas using the same laser beams that drive the beat wave. We describe measurements of electron d... View full abstract»

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  • High-Intensity CO2 Laser Breakdown of Low-Pressure Gas

    Publication Year: 1987 , Page(s): 167 - 172
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    We have performed CO2 interferometry measurements to characterize the high-intensity (1 ¿ 1.0 × 1014 W/cm2) CO2 laser breakdown in low-pressure (0.4 torr < P < 2.0 torr) dry air and demonstrate that this plasma can be used for beat wave accelerator studies. The plasma has a diameter and axial length of 0.2 mm and 2.0 mm, respectively, slightly greater than the focal diameter and depth of focus o... View full abstract»

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  • Enhanced Beat Wave Saturation Amplitude in an Ionizing Plasma

    Publication Year: 1987 , Page(s): 173 - 178
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1003 KB)  

    The excitation of a plasma wave by two laser beams, whose frequency difference is near the plasma frequency, is studied in a plasma with a density that is slowly increasing with time due to ongoing ionization as appropriate for experiments done in laser breakdown plasmas. Numerical integration of the relativistic equation for the evolution of the wave amplitude reveals that for a rate of increase ... View full abstract»

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  • A Microwave-Driven Beat Wave Accelerator for Scaled Experments

    Publication Year: 1987 , Page(s): 179 - 185
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    It is shown that large-amplitude (~ 104 V/cm) plasma waves can be resonantly excited by beating microwave pumps in an open resonator filled with plasma of subcritical density. The advantages and the possibilities of scaled experiments on beat wave accelerator concepts are discussed, in particular the plasma wave growth and saturation and the role of competing instabilities. View full abstract»

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  • Nonlinear Plasma Dynanics in the Plasma Wakefield Accelerator

    Publication Year: 1987 , Page(s): 186 - 191
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (970 KB)  

    Excitation of nonlinear plasma oscillations by an ultrarelativistic electron beam is considered in this paper. It is shown, by analytical solutions of the fully relativistic nonlinear fluid equations in one dimension, that under certain conditions on the relative densities of the electron beam and the plasma, extremely large longitudinal electric fields can be generated in the wake of the beam. Th... View full abstract»

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  • Stability of the Driving Bunch in the Plasma Wakefield Accelerator

    Publication Year: 1987 , Page(s): 192 - 198
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1939 KB)  

    We investigate the stability of the driving electron or positron beam in the plasma wakefield accelerator (PWFA). Although the beam is subject to self-focusing, filamentation, and two-stream instability, we find that all of these can be stabilized by introducing thermal energy and an axial magnetic field. View full abstract»

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  • Simulation of the Wisconsin-Argonne Plasma Wakefield Experiment

    Publication Year: 1987 , Page(s): 199 - 202
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2803 KB)  

    The plasma wakefield accelerator (PWFA) is an advanced accelerator concept that uses the large electric fields that can be generated in a plasma to accelerate charged particles. We present the results of a self-consistent two-dimensional simulation of the first experiment designed to test this concept. Linear theory predicts for this experiment an accelerating gradient of approximately 95 MV/m. Ho... View full abstract»

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  • Ion Plasma Wave Wakefield Accelerators

    Publication Year: 1987 , Page(s): 203 - 209
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (3266 KB)  

    The possibility of using space-charge waves on an ion beam or column as a wakefield accelerator is discussed. The primary advantages of using ion plasma waves over electron plasma waves are that the kinetic energy and fall-time requirements on the driving beam are reduced. One disadvantage in using a lower plasma frequency is that a larger current is required to achieve the same accelerating gradi... View full abstract»

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  • Beam Loading in Plasma Waves

    Publication Year: 1987 , Page(s): 210 - 217
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1342 KB)  

    Certain key accelerator issues relevant to plasma-based accelerators are studied in this article. Analytic results for important quantities of interest, such as maximum beam current, efficiency, and energy spread will be given. These results will then be compared with one-and two-dimensional particle-in-cell (PIC) computer simulations. Special emphasis will be placed on those schemes that offer no... View full abstract»

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  • Plasma Focusing for High-Energy Beams

    Publication Year: 1987 , Page(s): 218 - 225
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1316 KB)  

    We analyze the self-focusing effect of a relativistic electron or positron beam traversing through a thin slab of plasma in a linearized fluid theory, and show that the effect is very strong. The idea of employing this effect for a plasma lens suggested by Chen is then reviewed. The self-focusing force can be made uniform over the length of the beam by injecting an appropriate precursor. Computer ... View full abstract»

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  • A Z-Pinch Plasma Lens for Focusing High-Energy Particles in an Accelerator

    Publication Year: 1987 , Page(s): 226 - 237
    Cited by:  Papers (11)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (5505 KB)  

    The high azimuthal magnetic field of a current-carrying plasma column (z-pinch) can be used to collect and focus high-energy charged particles in accelerators. The beam optics and the apparent advantages of such a linear lens compared with conventional focusing devices, such as magnets and magnetic horns, are described. When a plasma lens shall be operated in routine accelerator runs, the physics ... View full abstract»

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  • Acceleration of Electron-Positron Plasmas to High Energies

    Publication Year: 1987 , Page(s): 238 - 242
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    It is suggested that electron-positron (e+ e-) plasma can be accelerated using the concept of cyclotron autoresonance between the particles and a linearly polarized laser radiation propagating along an axial magnetic field (Bz). This scheme can also be applied for other plasmas with oppositely charged particles of equal ¿q¿/m (e.g., positive and negative ions). An e+ e- plasma can be accelerated... View full abstract»

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  • High-Energy Electron Production by Vp × B Acceleration in Microwave-Plasma Interaction Experiments

    Publication Year: 1987 , Page(s): 243 - 250
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (3482 KB)  

    Detailed experimental observations on the microwave plasma interaction in a nonuniform plasma with weak magnetic field (¿/¿ ¿ 10-2) have revealed that high-energy electrons are produced by a process of the VP × B acceleration, where ¿ and ¿ are, respectively, electron cyclotron and microwave frequencies. The maximum energy of hot electrons increases almost linearly to about 1 keV with the RF... View full abstract»

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  • A TB-Mode Accelerator

    Publication Year: 1987 , Page(s): 251 - 255
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (865 KB)  

    An accelerator is proposed in which a TE-mode wave is used to drive charged particles in contrast to the usual linear accelerators in which longitudinal electric fields or TM-mode waves are supposed to be utilized. The principle of the acceleration is based on the Vp × B acceleration of a dynamo force acceleration. That is, a charged particle trapped in a transverse wave feels a constant electric... View full abstract»

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  • Announcing the Second Special Issue of the IEEE Transactions on Plasma Science on High-Power Microwave Generation

    Publication Year: 1987 , Page(s): 256
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  • Information for authors

    Publication Year: 1987 , Page(s): 256a
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Aims & Scope

IEEE Transactions on Plasma Sciences focuses on plasma science and engineering, including: magnetofluid dynamics and thermionics; plasma dynamics; gaseous electronics and arc technology.

 

 

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Meet Our Editors

Editor-in-Chief
Steven J. Gitomer, Ph.D.
Senior Scientist, US Civilian Research & Development Foundation
Guest Scientist, Los Alamos National Laboratory
1428 Miracerros Loop South
Santa Fe, NM  87505  87505  USA
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