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Intense Electron Beam Propagation Across A Magnetic Field
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Book Synopsis Intense Electron Beam Propagation Across a Magnetic Field by :
Download or read book Intense Electron Beam Propagation Across a Magnetic Field written by and published by . This book was released on 1989 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this paper we consider the propagation of an intense electron-ion beam across an applied magnetic field. In the absence of the applied field, the beam system is in a Bennett equilibrium state that involves electrons with both large axial and thermal velocities and a cold stationary space-charge neutralizing ion species. Typical parameters under consideration are V{sub o} (approximately) 1 MV, I (approximately) 5 kA, T{sub e} (approximately) 100 keV, and beam radii (approximately) 1 cm. We find that in the intense beam regime, the propagation is limited due to space-charge depression caused by the deflection of the electron beam by the transverse field. This critical field is of the order of the peak self-magnetic field of the electron beam which is substantially higher than the single particle cut-off field. 8 refs., 3 figs.
Book Synopsis Propagation of an Intense Electron Beam in Neutral Gas Along a Strong Magnetic Field by : Booth Richard Myers
Download or read book Propagation of an Intense Electron Beam in Neutral Gas Along a Strong Magnetic Field written by Booth Richard Myers and published by . This book was released on 1804 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Soviet Research on the Transport of Intense Relativistic Electron Beams Through High-pressure Air by : Nikita Wells
Download or read book Soviet Research on the Transport of Intense Relativistic Electron Beams Through High-pressure Air written by Nikita Wells and published by . This book was released on 1987 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soviet research on the propagation of intense relativistic electron beams (IREB) through fairly high-pressure air (pressure range 0.1 to 760 Torr) since the early 1970s has included the study of the plasma channel created by the passage of the electron beam through air, the resistive hose instability and its effect on beam propagation, the effect of self-fields, current enhancement, gas expansion, return currents, inherent beam energy spread, and other factors. This report covers Soviet developments in IREB propagation through air where the beam is not focused by external magnetic fields. The information was obtained from Soviet open-source publications with emphasis given to the last ten years of beam propagation in the Soviet Union. The volume of papers published on this subject in recent years indicates a significant increase in Soviet research in this area.
Book Synopsis Interaction of an Intense Relativistic Electron Beam with Axial and Convergent Magnetic Guide Fields by : John Joseph Bzura
Download or read book Interaction of an Intense Relativistic Electron Beam with Axial and Convergent Magnetic Guide Fields written by John Joseph Bzura and published by . This book was released on 1971 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electric and Magnetic Fields of an Intense Pulse of Relativistic Electrons Propagating Through Air by : Kenneth Allen Dreyer
Download or read book Electric and Magnetic Fields of an Intense Pulse of Relativistic Electrons Propagating Through Air written by Kenneth Allen Dreyer and published by . This book was released on 1979 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since propagation characteristics of an electron beam traversing a neutral gas are determined by the response of the beam electrons to their self-fields, an accurate evaluation of the electric and magnetic (EM) fields is essential to any propagation analysis. We report here on theoretical models that were developed for the electromagnetic fields associated with an electron beam propagating in air. One- and two-dimensional models of the fields, and a model for the electron avalanche of the air, were solved on a computer. The major conclusions from calculational results are: the ionization model adequately describes the ionization process over a pressure range of from five Torr to 760 Torr; ionization lag from the high energy secondary electrons is unimportant; in many cases the one-dimensional model was found to be as good as the two-dimensional model; and the net current saturates near 15 kilo-Amperes at sea-level pressure, and saturates at lower values at lower air pressure. (Author).
Book Synopsis Extraction and Propagation of an Intense Rotating Electron Beam by : R. J. Adler
Download or read book Extraction and Propagation of an Intense Rotating Electron Beam written by R. J. Adler and published by . This book was released on 1982 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: A hollow electron beam produced in a strong axial magnetic field has been extracted into a neutral gas cell where the magnetic field is zero. Due to radial magnetic field in the transition region, the beam rotates and maintains its hollow profile. Equilbrium is provided by the vz x b0 inward force and centrifugal outward force. We have studied both extraction and propagation phenomena in this configuration. Measurements include beam and net currents, beam generated axial magnetic fields, beam rotation and emittance, and light produced. A filamentation instability has been observed outside the magnetic field in this configuration. Beam equilibrium results are also presented and are compared with both experiment and numerical simulation.
Book Synopsis Fast Magnetic Field Penetration Into an Intense Neutralized Ion Beam by :
Download or read book Fast Magnetic Field Penetration Into an Intense Neutralized Ion Beam written by and published by . This book was released on 1992 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experiments involving propagation of neutralized ion beams across a magnetic field indicate a magnetic field penetration time determined by the Hall resistivity rather than the Spitzer or Pedersen resistivity. In magnetohydrodynamics the Hall current is negligible because electrons and ions drift together in response to an electric field perpendicular to the magnetic field. For a propagating neutralized ion beam, the ion orbits are completely different from the electron orbits and the Hall current must be considered. There would be no effect unless there is a component of magnetic field normal to the surface which would usually be absent for a good conductor. It is necessary to consider electron inertia and the consequent penetration of the normal component to a depth c/?{sub p}. In addition it is essential to consider a component of magnetic field parallel to the velocity of the beam which may be initially absent, but is generated by the Hall effect. The penetration time is determined by whistler waves rather than diffusion.
Book Synopsis On the Propagation of High Intensity, Relativistic Electron Beams by : Thomas G. Roberts
Download or read book On the Propagation of High Intensity, Relativistic Electron Beams written by Thomas G. Roberts and published by . This book was released on 1970 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intense beams of relativistic electrons have been extracted from the electrode space of flash X-ray machines and projected into plasma columns and drift spaces. In the plasma columns the beam pinches itself and propagates to a target at the end of the discharge. The plasma column is produced by a conventional pinch discharge in argon and the magnetic field of the plasma column is sufficient to guide the high energy beam around rather sharp curves with little loss of energy. In addition to the very interesting properties of the beam itself, and its applications in thermonuclear work, the possibility of using these beams for a relatively inexpensive, ion accelerator which may produce intense pulses of heavy ions with energies as high as 10 to the 12th power eV per nucleon has recently stimulated research. It is the purpose of the paper to describe the principal experimental results so far obtained, and to derive an expression for the maximum current which a beam may possess by use of the Bennett theory and the equilibrium current distribution which the beam must assume. It will also be shown that this expression reduces to the Alfven limit in a frame in which the beam's space charge is fully neutralized, and indicates that beams which exceed the Alfven limit may be expected to propagate in the laboratory frame. (Author).
Book Synopsis Optical Angular Momentum by : L. Allen
Download or read book Optical Angular Momentum written by L. Allen and published by CRC Press. This book was released on 2016-04-19 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spin angular momentum of photons and the associated polarization of light has been known for many years. However, it is only over the last decade or so that physically realizable laboratory light beams have been used to study the orbital angular momentum of light. In many respects, orbital and spin angular momentum behave in a similar manner, but t
Book Synopsis Passage of an Intense Relativistic Electron Beam Through a Cusped Magnetic Field by : Moshe Friedman
Download or read book Passage of an Intense Relativistic Electron Beam Through a Cusped Magnetic Field written by Moshe Friedman and published by . This book was released on 1970 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: A high-intensity, high-current relativistic beam has been injected into a cusped magnetic field. Energy detected by a calorimeter has been used to determine that 10 to the 14th power electrons are passed through the cusp. Preliminary observations indicate that these electrons produce a cloud of relativistic electrons gyrating in a magnetic field having a small ratio of translational to rotational energies. (Author).
Book Synopsis Propagation of a Nonrelativistic Electron Beam in a Plasma in a Magnetic Field by :
Download or read book Propagation of a Nonrelativistic Electron Beam in a Plasma in a Magnetic Field written by and published by . This book was released on 1986 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Soviet Research on the Transport of Intense Relativistic Electron Beams Through Low-pressure Air by : Nikita Wells
Download or read book Soviet Research on the Transport of Intense Relativistic Electron Beams Through Low-pressure Air written by Nikita Wells and published by . This book was released on 1986 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report analyzes Soviet research on the transport of intense relativistic electron beams (IREB) through low-pressure air and other gases without external magnetic fields. It reviews research reported in open-source technical publications from seven Soviet research institutes. These research papers indicate that Soviet interest in long-distance IREB transport at low gas pressure has endured from 1979 to the present.
Book Synopsis Physics of Neutralization of Intense High-Energy Ion Beam Pulses by Electrons by :
Download or read book Physics of Neutralization of Intense High-Energy Ion Beam Pulses by Electrons written by and published by . This book was released on 2010 with total page 567 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neutralization and focusing of intense charged particle beam pulses by electrons forms the basis for a wide range of applications to high energy accelerators and colliders, heavy ion fusion, and astrophysics. For example, for ballistic propagation of intense ion beam pulses, background plasma can be used to effectively neutralize the beam charge and current, so that the self-electric and self- magnetic fields do not affect the ballistic propagation of the beam. From the practical perspective of designing advanced plasma sources for beam neutralization, a robust theory should be able to predict the self-electric and self-magnetic fields during beam propagation through the background plasma. The major scaling relations for the self-electric and self-magnetic fields of intense ion charge bunches propagating through background plasma have been determined taking into account the effects of transients during beam entry into the plasma, the excitation of collective plasma waves, the effects of gas ionization, finite electron temperature, and applied solenoidal and dipole magnetic fields. Accounting for plasma production by gas ionization yields a larger self-magnetic field of the ion beam compared to the case without ionization, and a wake of current density and self-magnetic field perturbations is generated behind the beam pulse. A solenoidal magnetic field can be applied for controlling the beam propagation. Making use of theoretical models and advanced numerical simulations, it is shown that even a small applied magnetic field of about 100G can strongly affect the beam neutralization. It has also been demonstrated that in the presence of an applied magnetic field the ion beam pulse can excite large-amplitude whistler waves, thereby producing a complex structure of self-electric and self-magnetic fields. The presence of an applied solenoidal magnetic field may also cause a strong enhancement of the radial self-electric field of the beam pulse propagating through the background plasma. If controlled, this physical effect can be used for optimized beam transport over long distances.
Book Synopsis Physics of Nonneutral Plasmas by : Davidson
Download or read book Physics of Nonneutral Plasmas written by Davidson and published by Allied Publishers. This book was released on 1990 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Physics Of Nonneutral Plasmas by : Ronald C Davidson
Download or read book Physics Of Nonneutral Plasmas written by Ronald C Davidson and published by World Scientific Publishing Company. This book was released on 2001-10-22 with total page 755 pages. Available in PDF, EPUB and Kindle. Book excerpt: A nonneutral plasma is a many-body collection of charged particles in which there is not overall charge neutrality. The diverse areas of application of nonneutral plasmas include: precision atomic clocks, trapping of antimatter plasmas and antihydrogen production, quantum computers, nonlinear vortex dynamics and fundamental transport processes in trapped nonneutral plasmas, strongly-coupled one-component plasmas and Coulomb crystals, coherent radiation generation in free electron devices, such as free electron lasers, magnetrons and cyclotron masers, and intense charged particle beam propagation in periodic focusing accelerators and transport systems, to mention a few examples. Physics of Nonneutral Plasmas is a graduate-level text — complete with 138 assigned problems and the results from several classic experiments — which covers a broad range of topics related to the fundamental properties of collective processes and nonlinear dynamics of one-component and multispecies charged particle systems in which there is not overall charge neutrality. The subject matter is treated systematically from first principles, using a unified theoretical approach, and the emphasis is on the development of basic concepts that illustrate the underlying physical processes in circumstances where intense self fields play a major role in determining the evolution of the system. The theoretical analysis includes the full influence of dc space charge effects on detailed equilibrium, stability and transport properties. The statistical models used to describe the properties of nonneutral plasmas are based on the nonlinear Vlasov-Maxwell equations, the macroscopic fluid-Maxwell equations, or the Klimontovich-Maxwell equations, as appropriate, and extensive use is made of theoretical techniques developed in the description of multispecies electrically-neutral plasmas, as well as established techniques in classical mechanics, electrodynamics and statistical physics.Physics of Nonneutral Plasmas emphasizes basic physics principles, and the thorough presentation style is intended to have a lasting appeal to graduate students and researchers alike. Because of the advanced theoretical techniques developed for describing one-component charged particle systems, this book serves as a useful companion volume to Physics of Intense Charged Particle Beams in High Energy Accelerators by Ronald C Davidson and Hong Qin.
Download or read book Extreme Physics written by Jeff Colvin and published by Cambridge University Press. This book was released on 2014 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: Emphasising computational modeling, this introduction to the physics on matter at extreme conditions is invaluable for researchers and graduate students.
