Download or read book Transverse Oscillations Observed in IFR Ion Focused Regime Electron Beam Propagation written by R. F. Schneider and published by . This book was released on 1986 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Charge neutralized electron beam propagation in ionized gases has been studied recently at several laboratories. Such propagation in which the background plasma ions serve to neutralize the charge of tghe beam electrons is said to be the ion focused regime (IFR). There are currently several methods employed to create the background plasma channel through which the beam will propagate. The first is a beam induced plasma channel, the second is a low energy electron beam excited plasma, and the third is a laser initiated plasma channel. With the second and third methods, a pre-ionized channel is provided so that the beam space charge field will eject the plasma electrons leaving the positive ion channel. With the first method, the beam electrons leaving the positive ion channel. With the first method, the beam electrons themselves ionize the gas along the channel, so that much of the beam front is scattered by the higher pressure gas required leaving only a fraction of the pulse length to propagate. Of these methods, only the first, a beam induced plasma channel, is utilized in this work. A parallel reference gives much of the background for this work, and a subsequent paper will discuss results with a low energy electron beam excited channel.
Download or read book Electron Beam Propagation in the Ion Focused Regime IFR with the Experimental Test Accelerator ETA written by and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The IFR is a well-known stable, low pressure (0.10 to 0.120 torr in air) propagation window. Secondary electrons created by collisions of beam electrons with gas atoms are rapidly expelled by the strong radial electric field of the beam charge. The ions that remain inside the beam partially neutralize the electric field, allowing magnetic pinch forces to focus the beam. Experiments with the ETA beam have re-verified this stable window and are reported. Image forces from a close wall IFR propagation tank are also experimentally shown to center the beam and damp transverse oscillations. Results of experiments using 5 and 15 cm dia beam tubes are reported. For p tau> 2 torr-nsec (gas pressure x time into pulse the beam charge becomes completely neutralized by the ions, allowing a build up of plasma and resultant beam-plasma instabilities. The onset of these instabilities has been measured using rf pickup loops (0 to 2 GHz) and microwave detectors (6 to 40 GHz), and are also reported.
Download or read book Technical Reports Awareness Circular TRAC written by and published by . This book was released on 1987-02 with total page 746 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Intense Microwave and Particle Beams III written by Howard E. Brandt and published by . This book was released on 1992 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Intense Microwave and Particle Beams written by and published by . This book was released on 1992 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-11 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Brightness Accelerators written by Anthony D. Hyder and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt: A NATO Advanced Study Institute (ASI) on High-Brightness Accelerators was held at the Atholl Palace Hotel, Pitlochry, Perthshire, Scotland, from July 13 through July 25, 1986. This publication is the Proceedings of the Institute. This ASI emphasized the basic physics and engineering of the rela tively new and fast-emerging field of high-brightness particle accelera tors. These machines are high- to very-high-current (amperes to hundreds of kiloamperes), modest-voltage (megavolt to tens of megavolts) devices, and as such are opposed to those historically used for high-energy physics studies (i.e., gigavolt and higher energies and rather low currents). The primary focus of the Institute was on the physics of the accelerator and the beam, including the dynamics, equilibria, and insta bilities of high-current beams near the space-charge limit; accelerator engineering techniques; and the applications of high-brightness beams in areas such as free-electron lasers, synchrotron-radiation sources, food processing, and heavy- and light-ion fusion. The Institute concentrated on bringing together several diverse but related communities which, we hope, benefited from this opportunity to interact: the North American activity in machine technology, engineer ing, and diagnostics with the strong European theoretical community; the basic beam physicists with the engineering technologists.
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1987 with total page 1174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics Briefs written by and published by . This book was released on 1993 with total page 1334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 1572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific Program and Abstracts written by and published by . This book was released on 1985 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the 1987 IEEE Particle Accelerator Conference written by Eric R. Lindstrom and published by . This book was released on 1987 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1990 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Digest of Technical Papers written by and published by . This book was released on 1993 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book INIS Atomindex written by and published by . This book was released on 1987 with total page 1214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1726 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1993 with total page 916 pages. Available in PDF, EPUB and Kindle. Book excerpt:
