[PDF] Propagation Of High Current Relativistic Electron Beams eBook

Author : Thomas G. Roberts
Publisher :
Page : 13 pages
File Size : 42,74 MB
Release : 1970
Category :
ISBN :

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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).

Author : Nikita Wells
Publisher :
Page : 100 pages
File Size : 29,68 MB
Release : 1987
Category : Electron beams
ISBN :

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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.

Author : M. L. Andrews
Publisher :
Page : 14 pages
File Size : 27,25 MB
Release : 1971
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ISBN :

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Measurements on electron beams propagating in a gas-filled drift tube show pressure dependent longitudinally periodic variations of light intensity, microwave emission, beam head velocity and net current. These results are consistent with an ionization instability, such as that proposed by Eastlund. (Author).

Author : D. P. Bacon
Publisher :
Page : 29 pages
File Size : 23,50 MB
Release : 1980
Category :
ISBN :

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Experimental results of propagating up to 400 kA of relativistic electron beams (approx. 1 MeV) over a distance of 64 cm in a tightly focused mode are reported. Efficient transport (greater than 80%) was observed when a channel of plasma containing enough current to confine the hot electrons was used. Theory of the flow includes return current effects, and is in good agreement with experimental results. The theory is used to predict limits of this technique. (Author).

Author : Vyacheslov A. Buts
Publisher : Springer Science & Business Media
Page : 268 pages
File Size : 25,5 MB
Release : 2006-08-26
Category : Science
ISBN : 3540306900

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Spurred by the development of high-current, high-energy relativistic electron beams, this books delves into the foundations of a device- and geometry-independent theoretical treatment of a large collection of interacting and radiating electron bunches. Covers a broad swath of topics, from the radiation emission of a single charged particle to collective behaviour of a high-density electron bunch, to application in modern sytems.