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Hot Electron Plasma Formation And Confinement In The Tandem Mirror Experiment Upgrade
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Book Synopsis Hot-electron Plasma Formation and Confinement in the Tandem Mirror Experiment-upgrade by : David Bruce Ress
Download or read book Hot-electron Plasma Formation and Confinement in the Tandem Mirror Experiment-upgrade written by David Bruce Ress and published by . This book was released on 1988 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hot-electron Plasma Formation and Confinement in the Tandem Mirror Experiment-upgrade by :
Download or read book Hot-electron Plasma Formation and Confinement in the Tandem Mirror Experiment-upgrade written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The tandem mirror experiment-upgrade (TMX-U) at the Lawrence Livermore National Laboratory (LLNL) is the first experiment to investigate the thermal-barrier tandem-mirror concept. One attractive feature of the tandem magnetic mirror as a commercial power reactor is that the fusion reactions occur in an easily accessible center-cell. On the other hand, complicated end-cells are necessary to provide magnetohydrodynamic (MHD) stability and improved particle confinement of the center-cell plasma. In these end-cells, enhanced confinement is achieved with a particular axial potential profile that is formed with electron-cyclotron range-of-frequency heating (ECRF heating, ECRH). By modifying the loss rates of electrons at spatially distinct locations within the end-cells, the ECRH can tailor the plasma potential profile in the desired fashion. Specifically, the thermal-barrier concept requires generation of a population of energetic electrons near the midplane of each end-cell. To be effective, the transverse (to the magnetic field) spatial structure of the hot-electron plasma must be fairly uniform. In this dissertation we characterize the spatial structure of the ECRH-generated plasma, and determine how the structure builds up in time. Furthermore, the plasma should efficiently absorb the ECRF power, and a large fraction of the electrons must be well confined near the end-cell midplane. Therefore, we also examine in detail the ECRH power balance, determining how the ECRF power is absorbed by the plasma, and the processes through which that power is confined and lost. 43 refs., 69 figs., 6 tabs.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1990 with total page 852 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis ECRH and ICRH in the TMX-U Tandem Mirror by :
Download or read book ECRH and ICRH in the TMX-U Tandem Mirror written by and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In the Tandem Mirror Experiment Upgrade (TMX-U), the formation of a thermal barrier and the potential plugging of ion end loss were achieved at central-cell densities up to 2 x 1012 cm−3. The presence of a thermal barrier was confirmed by direct measurement, and ion axial-confinement times in the range 50 to 100 ms were measured. The ECRH in the end cells (a) initiates plasma startup, (b) generates hot, mirror-confined electrons to form thermal barriers, and (c) creates the plugging potential for central-cell ions. The ECRH system consists of four 200 kW, 28 GHz gyrotrons each feeding power to a separate heating location (two in each end plug). Fundamental heating is used at the potential plug, and second harmonic is used in the thermal barrier. Hot-electron plasmas are produced at total end-cell antenna power levels up to 300 kW. Strong single-pass absorption and net hot-electron heating efficiencies exceeding 40% are observed. Hot-electron parameters achieved are: n/sub eh//n/sub et/ up to 0.8, volume-average beta .beta. approx. = 0.15, and T/sub x/ (x-ray tail above 40 keV) in the range 75 to 200 keV.
Book Synopsis Plasma Potential Measurements in the Tandem Mirror Experiment-Upgrade Using a Time-of-flight Neutral Particle Analyzer by : Michael Robert Carter
Download or read book Plasma Potential Measurements in the Tandem Mirror Experiment-Upgrade Using a Time-of-flight Neutral Particle Analyzer written by Michael Robert Carter and published by . This book was released on 1987 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fusion Energy Update written by and published by . This book was released on 1980 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis CONFINEMENT OF A HOT ELECTRON PLASMA A MIRROR MACHINE,DECA I. REPRINTED FORM THE PHYSICS OF FLUIDS VOL.7 N°9-1964 by :
Download or read book CONFINEMENT OF A HOT ELECTRON PLASMA A MIRROR MACHINE,DECA I. REPRINTED FORM THE PHYSICS OF FLUIDS VOL.7 N°9-1964 written by and published by . This book was released on 1965 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1983 with total page 1028 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 1983 with total page 510 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 1989 with total page 1134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plasma Physics Index written by and published by . This book was released on 1982 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A review of electron-beam heating of magnetic-mirror confined plasmas, with application to the tandem mirror experiment by : Miloš Seidl
Download or read book A review of electron-beam heating of magnetic-mirror confined plasmas, with application to the tandem mirror experiment written by Miloš Seidl and published by . This book was released on 1979 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1989 with total page 1006 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Formation of Toroidal Plasma Confinement Configurations by Using Hot Electrons by :
Download or read book Formation of Toroidal Plasma Confinement Configurations by Using Hot Electrons written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Two possible means are described for producing closed, toroidal pinch-like configurations with hot electrons starting from a microwave-heated, hot electron plasma confined in open fields. The final configurations are directly related to Spheromak and Tormac.
Book Synopsis Progress in the Tandem Mirror Program by :
Download or read book Progress in the Tandem Mirror Program written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental results in TMX have confirmed the basic principles of the tandem-mirror concept. A center-cell particle confinement parameter eta tau approx. 1011 cm−3 s has been obtained at ion temperatures around 100 eV, which is a hundred-fold improvement over single mirrors at the same temperatures. For TMX these results have been obtained at peak beta values in the center cell in the range 10 to 40%, not yet limited by MHD activity; and ion-cyclotron resonant heating (ICRH) in the Phaedrus tandem-mirror experiment has produced beta values approx. 25%, which is several times the ideal MHD limit for that device. In addition, it has been demonstrated that the end fan chambers of TMX simultaneously isolate the hot electrons from the end walls, provide adequate pumping and conveniently dispose of the exhaust plasma energy either by thermal deposition on the end wall or by direct conversion to electricity (at 48% efficiency in agreement with calculations). Also, evidence was obtained for inherent divertor action in TMX, presumably in part responsible for the observed low impurity level (
Book Synopsis On the Formation of Toroidal Plasma Confinement Configurations by Using Hot Electrons by :
Download or read book On the Formation of Toroidal Plasma Confinement Configurations by Using Hot Electrons written by and published by . This book was released on 1979 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental Study of the Hot Electron Plasma Equilibrium in the Constance B Mirror Experiment by : Xing Chen
Download or read book Experimental Study of the Hot Electron Plasma Equilibrium in the Constance B Mirror Experiment written by Xing Chen and published by . This book was released on 1987 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: