Download or read book Modeling of ICRF Heating of a Tokamak Plasma written by David Li-Shui Quek Hwang and published by . This book was released on 1983 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling of ICRF Heating in PLT written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Significant heating with the fast magnetosonic wave near the ion cyclotron frequency has been demonstrated in the present generation of tokamaks. Effective wave absorption and heating can be achieved either by using the second harmonic or by heating at the fundamental of a minority ion component. Recent experiments in PLT have facilitated the refinement of a heating model which both shows good agreement with experiment and predicts favorable scaling to hotter, denser plasmas. Details of the model, including full wave theory, power deposition, Fokker-Planck theory, and scaling are discussed.
Download or read book Modelling and Simulation of Plasma Heating with ICRF Waves in JET Tokamak written by Eric Planas Parra and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the challenges that magnetic confinement fusion faces is achieving extreme temperatures inside the reactors. Absorption of electromagnetic waves in the ion cyclotron range of frequencies (ICRF) has demonstrated efficient plasma heating in present-day tokamak experiments and it is one of the three auxiliary heating methods foreseen for the International Thermonuclear Experimental Reactor (ITER). Therefore, the study of different heating schemes using ICRF waves is of utmost interest to optimize the fusion performance. The present thesis is focused in the computational assessment of plasma heating using ICRF waves and neutral beam injection (NBI) using the PION code. A strong emphasis is given to the physics behind these heating mechanisms and how they affect the fusion performance. This project has been carried out in the context of the present deuterium (D) campaign that is being performed at the Joint European Torus (JET) experimental reactor in preparation for the next deuterium-tritium (D-T) campaign DTE2, which is planned to begin in 2021. The results presented in this thesis consist of two parts. In the first part we model several D plasma discharges carried out at JET and we assess the role of different heating characteristics in the fusion yield in pure D plasmas. The second part of this project is focused on the extrapolation of a high performance plasma discharge to a 50%:50% D-T scenario. A comparison of the heating characteristics with pure D plasmas is provided, and special attention is given to the resulting fusion yield.
Download or read book Fast Wave Coupling and Heating of Reactor Type Tokamaks in the ICRF written by Hugo Adolfo Romero and published by . This book was released on 1982 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Numerical Simulations of ICRF Heated Tokamak Plasmas written by Donald Thomas Blackfield and published by . This book was released on 1980 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computational Modeling of ICRF Antenna Coupling in Tokamaks written by Michael H. Bettenhausen and published by . This book was released on 1995 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Power ICRF Heating Experiments on the JIPP T IIU Tokamak written by and published by . This book was released on 1989 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fusion Plasma Theory written by and published by . This book was released on 1992 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research performed under this grant during the past year has been concentrated on the following several key tokamak ICRF (Ion Cyclotron Range of Frequencies) coupling, heating and current drive issues: Efficient coupling during the L- to H- mode transition by analysis and computer simulation of ICRF antennas; analysis of ICRF cavity-backed coil antenna coupling to plasma edge profiles including fast and ion Bernstein wave coupling for heating and current drive; benchmarking the codes to compare with current JET, D-IIID and ASDEX experimental results and predictions for advanced tokamaks such as BPX and SSAT (Steady-State Advanced Tokamak); ICRF full-wave field solutions, power conservation, heating analyses and minority ion current drive; and the effects of fusion alpha particle or ion tail populations on the ICRF absorption. Research progress, publications, and conference and workshop presentations are summarized in this report.
Download or read book Fundamental Studies of Fusion Plasmas written by and published by . This book was released on 1993 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Work on ICRF interaction with the edge plasma is reported. ICRF generated convective cells have been established as an important mechanism for influencing edge transport and interaction with the H-mode, and for controlling profiles in the tokamak scrape-off-layer. Power dissipation by rf sheaths has been shown to be significant for some misaligned ICRF and IIBW antenna systems. Near-field antenna sheath work has been extended to the far-field case, important for experiments with low single pass absorption. Impurity modeling and Faraday screen design support has been provided for the ICRF community. In the area of core-ICRF physics, the kinetic theory of heating by applied ICRF waves has been extended to retain important geometrical effects relevant to modeling minority heated tokamak plasmas, thereby improving on the physics base that is standard in presently employed codes. Both the quasilinear theory of ion heating, and the plasma response function important in wave codes have been addressed. In separate studies, it has been shown that highly anisotropic minority heated plasmas can give rise to unstable field fluctuations in some situations. A completely separate series of studies have contributed to the understanding of tokamak confinement physics. Additionally, a diffraction formalism has been produced which will be used to access the focusability of lower hybrid, ECH, and gyrotron scattering antennas in dynamic plasma configurations.
Download or read book Computation of ICRF Heating Fields in a Tokamak written by David N. Smithe and published by . This book was released on 1985 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ICRF Heating in Tokamaks written by Hironori Takahashi and published by . This book was released on 1977 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selective ICRF Heating of Neutral Beam Injected Ions in a Tokamak Plasma written by Lars-Olof Pekkari and published by . This book was released on 1984 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ion Radial Transport Induced by ICRF Waves in Tokamaks written by and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The wave-induced fluxes of energetic-trapped ions during ICRF heating of tokamak plasmas are calculated using quasilinear equations. A simple single particle model of this transport mechanism is also given. Both a convective flux proportional to k/sub phi/vertical bar E+vertical bar2 and a diffusive flux proportional to k/sub phi/2vertical bar E+vertical bar2 are found. Here, k/sub phi/ is the toroidal wave number and E+ is the left-hand polarized wave field. The convective flux may become significant for large k/sub phi/ if the wave spectrum is asymmetric in k/sub phi/. But for the conditions of most previous experiments, these calculations indicate that radial transport driven directly by the ICRF wave is unimportant.
Download or read book Tokamak Fusion Reactor Design Using Recent Theoretical Models of Heat Transport written by Erfan Ibrahim and published by . This book was released on 1987 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ICRF Heating and Wave Generation in the ATC Tokamak written by Hironori Takahashi and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Two ion ICRF Heating in Tokamaks written by Einar Tennfors and published by . This book was released on 1985 with total page 28 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 1994-03 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
