EBookClubs

Read Books & Download eBooks Full Online

EBookClubs

Read Books & Download eBooks Full Online

Book Study on Impurity Radiation and Transport of JT 60U Plasmas

Download or read book Study on Impurity Radiation and Transport of JT 60U Plasmas written by Tatsuo Ishijima and published by . This book was released on 2000 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Self consistent Modeling of Plasma Response to Impurity Spreading from Intense Localized Source

Download or read book Self consistent Modeling of Plasma Response to Impurity Spreading from Intense Localized Source written by Mikhail Koltunov and published by Forschungszentrum Jülich. This book was released on 2012 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Scientific and Technical Aerospace Reports

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Energy Research Abstracts

Download or read book Energy Research Abstracts written by and published by . This book was released on 1995 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Impurity Transport Studies in Tokamak Edge Plasmas Using Visibe Imaging

Download or read book Impurity Transport Studies in Tokamak Edge Plasmas Using Visibe Imaging written by Sanjay Gangadhara and published by . This book was released on 2001 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding impurity transport in the scrape-off layer (SOL) of tokamak plasmas is a necessary piece of developing the physics basis for designing next-generation reactors. A system for inferring impurity transport parallel and perpendicular to local magnetic field lines has been developed on Alcator C-Mod using gas-injection "plumes". In this system, impurity gas is injected at a fixed position in the SOL via a reciprocating fast-scanning probe, and the resulting emission is imaged. In this paper visible light emission patterns from C+1 and C+2 ions are presented.

Book Technical Publications by JAERI Staff in

Download or read book Technical Publications by JAERI Staff in written by Nihon Genshiryoku Kenkyujo and published by . This book was released on 2001 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Review of JT 60U Experimental Results in 1998

Download or read book Review of JT 60U Experimental Results in 1998 written by and published by . This book was released on 1999 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Effects of Impurity Radiation on Reversed field Pinch Evolution

Download or read book Effects of Impurity Radiation on Reversed field Pinch Evolution written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of impurity radiation on the evolution of a reversed-field pinch plasma are studied by means of a one-dimensional MHD simulation code that includes both plasma transport and impurity effects, and follows the plasma through a series of equilibrium states. The equations are split into two sets, one that contains plasma transport and another that contains atomic physics effects. Two codes were developed and linked together to solve the full problem. Results are presented for the ZT-S, ZT-40, and RFX experiments with a fixed set of parameters, typical or envisioned, and various concentrations of impurities. Radiation barriers are encountered, and limits are found on the acceptable level of low Z impurities that may be present in these devices. It is shown that the temperatures currently observed in the ZT-S experiment are radiation limited. Next, a criterion for radiation barrier burn-through is derived in terms of appropriate nondimensional parameters and calibrated by comparison to the numerical simulations for the case of oxygen.

Book Impurity Transport Magnetically Confined Plasmas

Download or read book Impurity Transport Magnetically Confined Plasmas written by Katsumi Ida and published by IOP Publishing Limited. This book was released on 2023-12-19 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Motivated by a renewed interest in impurity transport in nuclear fusion research, this reference text covers the diagnostics, experimental approach, and results of recent impurity transport studies in tokamak and helical plasmas. It also covers the impurity transport parallel to the magnetic field in the scrape-off layer (SOL) and the impact of magnetic topology on impurity transport. Topics covered include an introduction to impurity transport; the diagnostics system with passive and active spectroscopy; impurity transport across magnetic flux surfaces; the effect of magnetic topology; and the control of impurity transport using electron cyclotron resonance heating and ion cyclotron resonance heating. With few books available on impurity transport in plasmas, this book would appeal to academic researchers and graduate students on the field of plasma physics and nuclear fusion research. Key Features Describes recent developments in diagnostics for impurity transport Covers recent developments of an experimental approach for impurity transport study Provides a comprehensive understanding of impurity transport in different magnetic configurations Covers a new area of impurity transport experiment including the effect of magnetic topology Written by high-profile authors

Book Impurity Transport Studies on MAST

Download or read book Impurity Transport Studies on MAST written by Stuart Henderson and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Impurity transport is a subject of fundamental importance in plasma physics in general and in tokamak physics in particular. The behaviour of the various impurity species and the evolution of their concentration determines, among other things, the fuel dilution and the fusion reaction rate, the plasma radiation pattern and the local energy balance, the plasma effective charge and resistivity and the neutral beam particle and power deposition profile. It is therefore important to develop both a sound experimental base and reliable models to interpret the experimental results and to predict the transport properties of impurities. Time-dependent helium and methane gas puff experiments have been performed on the Mega Ampere Spherical Tokamak (MAST) during a two point plasma current, Ip, scan in L-mode and a confinement scan at constant Ip. For the Ip scan, a dimensionless safety factor, q, scan was attempted by using a constant toroidal magnetic field and by moderating the beam power to match the plasma temperature. The temperature and magnetic field was also kept constant during the confinement scan to probe the effects of the electron density gradient. An evaluation of the He II (n = 4 -> 3) and C VI (n = 8 -> 7) spectral lines, induced by active charge exchange emission and measured using the RGB 2D camera on MAST, indicate that carbon experiences moderately higher rates of diffusion and inward convection than helium in the L-mode high Ip plasma. Lowering Ip in Lmode caused a moderate increase in the helium diffusion and convection coefficients near the plasma edge. Neoclassical simulations were carried out which indicate anomalous rates of helium and carbon diffusion and inward convection in the outer regions of both L-mode plasmas. Similar rates of helium diffusion are found in the H-mode plasma, however these rates are consistent with neoclassical predictions. The anomalous inward pinch found for helium in the L-mode plasmas is also not apparent in H-mode. An outward flux of helium and carbon is found at mid-radius in H-mode, corresponding the region of positive electron density gradient. Linear gyrokinetic simulations of one flux surface in L-mode using the gs2 and gkw codes were performed which show that equilibrium flow shear is sufficient to stabilise ion temperature gradient (ITG) modes, consistent with BES observations, and suggest that collisionless trapped electron modes (TEMs) may dominate the anomalous helium particle transport. A quasilinear estimate of the dimensionless peaking factor associated with TEMs is in good agreement with experiment. Collisionless TEMs are more stable in H-mode because the electron density gradient is flatter. The steepness of this gradient is therefore pivotal in determining the inward neoclassical particle pinch and the particle flux associated with TEM turbulence.

Book Plasma Physics and Controlled Nuclear Fusion Research

Download or read book Plasma Physics and Controlled Nuclear Fusion Research written by and published by . This book was released on 1992 with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt: