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Reactor Issues For Tandem Mirrors Operating In The Negative Potential Mode
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Book Synopsis Reactor Issues for Tandem Mirrors Operating in the Negative-potential Mode by :
Download or read book Reactor Issues for Tandem Mirrors Operating in the Negative-potential Mode written by and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: During 1985, interest has been revived at LLNL in tandem mirrors operating in the negative-potential mode. The negative tandem is formed by combining ECRH-sustained hot electron end cell plasmas with pumping mechanisms to remove trapped ions from the end cells. No sloshing ions are required. The resulting negative potential in the end cells confines the central cell electrons. The requirement of charge neutrality causes the ambipolar potential of the central cell to become negative relative to the end wall (hence, the name ''negative' tandem mirror), thereby providing central cell ion confinement. This potential distribution is the exact inverse of the axial distribution for the conventional (positive) tandem mirror without thermal barriers. In the negative tandem mirror, central cell electrons are confined electrostatically, end cell electrons are confined magnetically, and ions are confined electrostatically everywhere. In this report, we briefly assess the reactor issues pertinent to the operation of the tandem mirror in the negative mode. 7 refs., 5 figs.
Book Synopsis Issues facing the U.S. mirror program by :
Download or read book Issues facing the U.S. mirror program written by and published by . This book was released on 1978 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Studies of Negative Potential Tandem Mirror Reactors by : Emad Samih Zawaideh
Download or read book Studies of Negative Potential Tandem Mirror Reactors written by Emad Samih Zawaideh and published by . This book was released on 1983 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Negative Deuterium Ions for Tandem Mirror Next Step and Tandem Mirror Reactors by :
Download or read book Negative Deuterium Ions for Tandem Mirror Next Step and Tandem Mirror Reactors written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent designs for mirror fusion reactors with good power balance include ambipolar potential plugs to reduce end losses and thermal barriers to maintain a difference in electron temperature between the large-volume central cell plasma and the confining end plugs. These designs led to several new requirements for D° neutral beams derived from negative ions at energies of 150 to 200 keV and possibly higher. Such beams are required for injection of fat ions into the plugs and the barrier and for charge-exchange pumping of thermal ions diffusing into the barrier. Negative ions are preferred for these purposes because of their relatively high efficiency of neutralization and their high purity of single-energy D−. Examples of injector designs for Tandem Mirror Next Step (TMNS) and Tandem Mirror Reactors (TMR) are presented.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1992-02 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Physics Parameter Calculations for a Tandem Mirror Reactor with Thermal Barriers by :
Download or read book Physics Parameter Calculations for a Tandem Mirror Reactor with Thermal Barriers written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermal barriers are localized reductions in potential between the plugs and the central cell, which effectively insulate trapped plug electrons from the central cell electrons. By then applying electron heating in the plug, it is possible to obtain trapped electron temperatures that are much greater than those of the central cell electrons. This, in turn, effects an increase in the plug potential and central cell confinement with a concomitant decrease in plug density and injection power. Ions trapped in the barrier by collisions are removed by the injection of neutral beams directed inside the barrier cell loss cone; these beam neutrals convert trapped barrier ions to neutrals by charge exchange permitting their escape. We describe a zero-dimensional physics model for this type of reactor, and present some preliminary results for Q.
Download or read book Negative Tandem Mirror written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A tandem mirror configuration can be created by combining hot electron end cell plasmas with neutral beam pumping. A region of large negative potential formed in each end cell confines electrons in the central cell. The requirement of charge neutrality causes the central cell potential to become negative with respect to ground in order to confine ions as well as electrons. We discuss the method of producing and calculating the desired axial potential profile, and show the calculated axial potential profile and plasma parameters for a negative configuration of TMX-Upgrade.
Book Synopsis Analysis of Tandem Mirror Reactor Performance by : K. F. Wu
Download or read book Analysis of Tandem Mirror Reactor Performance written by K. F. Wu and published by . This book was released on 1984 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tandem Mirror Reactor by : Taha Houssine Zerguini
Download or read book Tandem Mirror Reactor written by Taha Houssine Zerguini and published by . This book was released on 1979 with total page 178 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 1985-02 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Constraints on Very High Beta Tandem Mirror Reactor Operation by : Robert E. Potok
Download or read book Constraints on Very High Beta Tandem Mirror Reactor Operation written by Robert E. Potok and published by . This book was released on 1984 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design of Tandem Mirror Reactors with Thermal Barriers by :
Download or read book Design of Tandem Mirror Reactors with Thermal Barriers written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: End-plug technologies for tandem mirror reactors include high-field superconducting magnets, neutral beam injectors, and gyrotrons for electron cyclotron resonant heating (ECRH). In addition to their normal use for sustenance of the end-plug plasmas, neutral beam injectors are used for ''pumping'' trapped ions from the thermal barrier regions by charge exchange. An extra function of the axially directed pump beams is the removal of thermalized alpha particles from the reactor. The principles of tandem mirror operation with thermal barriers will be demonstrated in the upgrade of the Tandem Mirror Experiment (TMX-U) in 1981 and the tandem configuration of the Mirror fusion Test Facility (MFTF-B) in 1984.
Book Synopsis Tandem Mirror Reactors with Thermal Barriers by :
Download or read book Tandem Mirror Reactors with Thermal Barriers written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Preliminary calculations of Q and magnet designs are presented for three different versions of tandem mirror reactors (TMR) using thermal barriers to enhance plug potentials by auxiliary electron heating. These three versions, called A-cell-barrier TMR, axisymmetric-barrier TMR, and inside-barrier TMR, exhibit reduced plug density (n/sub p/ “1019 m−3) and less required magnetic mirror field (B/sub mirror approx. = 9 T) compared to TMR designs without thermal barriers. A-cell barrier TMR Q's range from 5 to 25 depending on the central-cell length (L/sub c/ = 100 to 200 m) and peak center-cell beta .beta./sub c/ (0.3 to 0.7) allowed by MHD stability. Axisymmetric-barrier TMR Q's range from 14 at L/sub c/ = 100 m to 30 at L/sub c/ = 200 m, if peak .beta./sub c/ = 1. From a global equilibrium model for the inside-barrier TMR, Q values greater than 15 are achieved for .nu. = 0.5 in the modified Boltzmann relation for the plug potential. Even higher Q's are obtained using ECRF heating in the barrier to create a hot, mirror-trapped electron population. TMR's burning D-D as a fuel have been analyzed with a modified version of the global equilibrium model and under the assumption of an axisymmetric plug and barrier stabilized by surface magnetic fields. High-barrier mirror ratio is now feasible (R/sub b/ = 30-50), and short barrier length permits Q/sub DD/ values greater than 5.
Download or read book Fusion Energy Update written by and published by . This book was released on 1986 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Congress. House. Committee on Appropriations. Subcommittee on Energy and Water Development Publisher : ISBN 13 : Total Pages :2386 pages Book Rating :4.F/5 ( download)
Book Synopsis Energy and water development appropriations for 1984 by : United States. Congress. House. Committee on Appropriations. Subcommittee on Energy and Water Development
Download or read book Energy and water development appropriations for 1984 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Energy and Water Development and published by . This book was released on 1983 with total page 2386 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 1989 with total page 798 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 1038 pages. Available in PDF, EPUB and Kindle. Book excerpt:
