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Mhd Induced Energetic Ion Loss During H Mode Discharges In The National Spherical Torus Experiment Nstx
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Book Synopsis MHD-induced Energetic Ion Loss During H-mode Discharges in the National Spherical Torus Experiment (NSTX). by : S. S. Medley
Download or read book MHD-induced Energetic Ion Loss During H-mode Discharges in the National Spherical Torus Experiment (NSTX). written by S. S. Medley and published by . This book was released on 2004 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis MHD-induced Energetic Ion Loss During H-mode Discharges in the National Spherical Torus Experiment (NSTX). by : S. S. Medley
Download or read book MHD-induced Energetic Ion Loss During H-mode Discharges in the National Spherical Torus Experiment (NSTX). written by S. S. Medley and published by . This book was released on 2004 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fusión Nuclear written by and published by . This book was released on 2004-12 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Neutral Particle Analyzer Vertically Scanning Measurements of MHD-induced Energetic Ion Redistribution Or Loss in the National Spherical Torus Experiment by :
Download or read book Neutral Particle Analyzer Vertically Scanning Measurements of MHD-induced Energetic Ion Redistribution Or Loss in the National Spherical Torus Experiment written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Observations of magneto-hydro-dynamic (MHD) induced redistribution or loss of energetic ions measured using the vertically scanning capability of the Neutral Particle Analyzer diagnostic on the National Spherical Torus Experiment (NSTX) are presented along with TRANSP and ORBIT code analysis of the results. Although redistribution or loss of energetic ions due to bursting fishbone-like and low-frequency (f ~ 10 kHz) kinktype MHD activity has been reported previously, the primary goal of this work is to study redistribution or loss due to continuous Alfvénic (f ~ 20 - 150 kHz) modes, a topic that heretofore has not been investigated in detail for NSTX plasmas. Initial indications are that the former drive energetic ion loss whereas the continuous Alfvénic modes only cause redistribution and the energetic ions remain confined.
Download or read book Fusion Science and Technology written by and published by . This book was released on 2008 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Beta-limiting MHD Instabilities in Improved-performance NSTX Spherical Torus Plasmas by :
Download or read book Beta-limiting MHD Instabilities in Improved-performance NSTX Spherical Torus Plasmas written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Global magnetohydrodynamic stability limits in the National Spherical Torus Experiment (NSTX) have increased significantly recently due to a combination of device and operational improvements. First, more routine H-mode operation with broadened pressure profiles allows access to higher normalized beta and lower internal inductance. Second, the correction of a poloidal field coil induced error-field has largely eliminated locked tearing modes during normal operation and increased the maximum achievable beta. As a result of these improvements, peak beta values have reached (not simultaneously) [beta]{sub t} = 35%, [beta]{sub N} = 6.4, [beta]{sub N} = 4.5, [beta]{sub N}/l{sub i} = 10, and [beta]{sub P} = 1.4. High [beta]{sub P} operation with reduced tearing activity has allowed a doubling of discharge pulse-length to just over 1 second with sustained periods of [beta]{sub N} ≈ 6 above the ideal no-wall limit and near the with-wall limit. Details of the [beta] limit scalings and [beta]-limiting instabilities in various operating regimes are described.
Book Synopsis MHD Induced Neutral Beam Ion Loss from NSTX Plasmas by :
Download or read book MHD Induced Neutral Beam Ion Loss from NSTX Plasmas written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Bursts of ~60 kHz activity on Mirnov coils occur frequently in NSTX plasmas and these are accompanied by bursts of neutral beam ion loss over a range in pitch angles. These losses have been measured with a scintillator type loss probe imaged with a high speed (>10,000 frames/s) video camera, giving the evolution of the energy and pitch angle distributions of the lost neutral beam ions over the course of the events. The instability occurs below the TAE frequency in NSTX (~100 kHz) in high beta plasmas and may be a beta driven Alfvén acoustic (BAAE) mode.
Book Synopsis H-Mode Turbulence, PowerThreshold, ELM, and Pedestal Studies in NSTX. by : R. Maingi
Download or read book H-Mode Turbulence, PowerThreshold, ELM, and Pedestal Studies in NSTX. written by R. Maingi and published by . This book was released on 2004 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis H-Mode Turbulence, Power Threshold, ELM, and Pedestal Studies in NSTX. by :
Download or read book H-Mode Turbulence, Power Threshold, ELM, and Pedestal Studies in NSTX. written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: High-confinement mode (H-mode) operation plays a crucial role in NSTX [National Spherical Torus Experiment] research, allowing higher beta limits due to reduced plasma pressure peaking, and long-pulse operation due to high bootstrap current fraction. Here, new results are presented in the areas of edge localized modes (ELMs), H-mode pedestal physics, L-H turbulence, and power threshold studies. ELMs of several other types (as observed in conventional aspect ratio tokamaks) are often observed: (1) large, Type I ELMs, (2) ''medium'' Type II/III ELMs, and (3) giant ELMs which can reduce stored energy by up to 30% in certain conditions. In addition, many high-performance discharges in NSTX have tiny ELMs (newly termed Type V), which have some differences as compared with ELM types in the published literature. The H-mode pedestal typically contains between 25-33% of the total stored energy, and the NSTX pedestal energy agrees reasonably well with a recent international multi-machine scaling. We find that the L-H transition occurs on a [approx]100 [micro]sec timescale as viewed by a gas puff imaging diagnostic, and that intermittent quiescent periods precede the final transition. A power threshold identity experiment between NSTX and MAST shows comparable loss power at the L-H transition in balanced double-null discharges. Both machines require more power for the L-H transition as the balance is shifted toward lower single null. High field side gas fueling enables more reliable H-mode access, but does not always lead to a lower power threshold e.g., with a reduction of the duration of early heating. Finally the edge plasma parameters just before the L-H transition were compared with theories of the transition. It was found that while some theories can separate well-developed L- and H-mode data, they have little predictive value.
Book Synopsis 6.-IAEA-Shusai-"Jiki-Tojikome-Kei-ni-Okeru-Kōsoku-Ryūshi"-ni-Kansuru-Gijutsu-Senmon-Kaigō-hōbunshū by :
Download or read book 6.-IAEA-Shusai-"Jiki-Tojikome-Kei-ni-Okeru-Kōsoku-Ryūshi"-ni-Kansuru-Gijutsu-Senmon-Kaigō-hōbunshū written by and published by . This book was released on 2000 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Magnetic Fusion Energy by : George Neilson
Download or read book Magnetic Fusion Energy written by George Neilson and published by Woodhead Publishing. This book was released on 2016-06-02 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic Fusion Energy: From Experiments to Power Plants is a timely exploration of the field, giving readers an understanding of the experiments that brought us to the threshold of the ITER era, as well as the physics and technology research needed to take us beyond ITER to commercial fusion power plants. With the start of ITER construction, the world’s magnetic fusion energy (MFE) enterprise has begun a new era. The ITER scientific and technical (S&T) basis is the result of research on many fusion plasma physics experiments over a period of decades. Besides ITER, the scope of fusion research must be broadened to create the S&T basis for practical fusion power plants, systems that will continuously convert the energy released from a burning plasma to usable electricity, operating for years with only occasional interruptions for scheduled maintenance. Provides researchers in academia and industry with an authoritative overview of the significant fusion energy experiments Considers the pathway towards future development of magnetic fusion energy power plants Contains experts contributions from editors and others who are well known in the field
Book Synopsis Investigation of the Effect of Resistive MHD Modes on Spherical Torus Performance in CDX-U. by : D. Stutman
Download or read book Investigation of the Effect of Resistive MHD Modes on Spherical Torus Performance in CDX-U. written by D. Stutman and published by . This book was released on 1997 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The H-Mode Pedestal and Edge Localized Modes in NSTX. by : R. Maingi
Download or read book The H-Mode Pedestal and Edge Localized Modes in NSTX. written by R. Maingi and published by . This book was released on 2004 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis MHD High Performance Demonstration Experiment by : Arnold Engineering Development Center
Download or read book MHD High Performance Demonstration Experiment written by Arnold Engineering Development Center and published by . This book was released on 1978 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Impact of MHD Equilibrium Input Variations on High-beta Stability Boundaries on NSTX. by : Franco Paoletti
Download or read book Impact of MHD Equilibrium Input Variations on High-beta Stability Boundaries on NSTX. written by Franco Paoletti and published by . This book was released on 2001 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Report on the MHD performance demonstration experiment by : Arnold Engineering Development Center
Download or read book Report on the MHD performance demonstration experiment written by Arnold Engineering Development Center and published by . This book was released on 1978 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Trapped Energetic Ions on MHD Activity in Spherical Tori by : Ya. I. Kolesnichenko
Download or read book Effect of Trapped Energetic Ions on MHD Activity in Spherical Tori written by Ya. I. Kolesnichenko and published by . This book was released on 2002 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
