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Book Measurement of Density Fluctuations on the JIPP T II Tokamak Plasma by Millimeter and Sub millimeter Wave Scattering

Download or read book Measurement of Density Fluctuations on the JIPP T II Tokamak Plasma by Millimeter and Sub millimeter Wave Scattering written by Tsutomu Tetsuka and published by . This book was released on 1986 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Density Fluctuations and Particle thermal Transport for Ohmically and Auxiliarily Heated Plasmas in the JIPP T IIU Tokamak

Download or read book Density Fluctuations and Particle thermal Transport for Ohmically and Auxiliarily Heated Plasmas in the JIPP T IIU Tokamak written by K. Kawahata and published by . This book was released on 1988 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Fast Wave Current Drive Experiment on the DIII D Tokamak

Download or read book Fast Wave Current Drive Experiment on the DIII D Tokamak written by and published by . This book was released on 1992 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: One method of radio-frequency heating which shows theoretical promise for both heating and current drive in tokamak plasmas is the direct absorption by electrons of the fast Alfven wave (FW). Electrons can directly absorb fast waves via electron Landau damping and transit-time magnetic pumping when the resonance condition [omega] - [kappa]{sub {parallel}e}[upsilon]{sup {parallel}e} = O is satisfied. Since the FW accelerates electrons traveling the same toroidal direction as the wave, plasma current can be generated non-inductively by launching FW which propagate in one toroidal direction. Fast wave current drive (FWCD) is considered an attractive means of sustaining the plasma current in reactor-grade tokamaks due to teh potentially high current drive efficiency achievable and excellent penetration of the wave power to the high temperature plasma core. Ongoing experiments on the DIII-D tokamak are aimed at a demonstration of FWCD in the ion cyclotron range of frequencies (ICRF). Using frequencies in the ICRF avoids the possibility of mode conversion between the fast and slow wave branches which characterized early tokamak FWCD experiments in the lower hybrid range of frequencies. Previously on DIII-D, efficient direct electron heating by FW was found using symmetric (non-current drive) antenna phasing. However, high FWCD efficiencies are not expected due to the relatively low electron temperatures (compared to a reactor) in DIII-D.

Book Fast Wave Heating at Intermediate Ion Cyclotron Harmonics on the JIPP T IIU Tokamak

Download or read book Fast Wave Heating at Intermediate Ion Cyclotron Harmonics on the JIPP T IIU Tokamak written by Y. Takase and published by . This book was released on 1990 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Application of Intermediate Frequency Range Fast Wave to JIPP T IIU Plasma

Download or read book Application of Intermediate Frequency Range Fast Wave to JIPP T IIU Plasma written by T. Seki and published by . This book was released on 1990 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Fast Wave Heating at Intermediate Ion Cyclotron Harmonicsonthe JIPP T IIU Tokamak

Download or read book Fast Wave Heating at Intermediate Ion Cyclotron Harmonicsonthe JIPP T IIU Tokamak written by R. (and others). Kumazawa and published by . This book was released on 1990 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Propagation and Damping of Lower Hybrid Fast Waves in a Tokamak Plasma

Download or read book Propagation and Damping of Lower Hybrid Fast Waves in a Tokamak Plasma written by Kwok Fai Lai and published by . This book was released on 1989 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Full Wave Simulations of Fast Wave Mode Conversion and Lower Hybrid Wave Propagation in Tokamaks

Download or read book Full Wave Simulations of Fast Wave Mode Conversion and Lower Hybrid Wave Propagation in Tokamaks written by John C. Wright and published by . This book was released on 2004 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fast Wave (FW) studies of mode conversion (MC) processes at the ion -- ion hybrid layer in toroidal plasmas N must capture the disparate scales of the FW and mode converted ion Bernstein (IBW) and ion cyclotron waves (ICW). Correct modeling of the MC layer requires resolving wavelengths on the order of k pi~1 which leads to a scaling of the maximum poloidal mode number, Mmax, proportional to 1/p (p=pi/L). The computational resources needed a scale with the number of radial (Nr), poloidal (No), and toroidal (No) elements as Nr * No * N3o. Two full wave codes, a massively-parallel-processor (MPP) version of the TORIC-2D finite Larmor radius code [M. Brambilla, Plasma Phys. Controlled Fusion 41, 1 (1999)] and also an all orders spectral code AORSA2D [E. F. Jaeger et al., Phys. Plasmas 9, 1873 (2002) ], have been developed which for the first time are capable of achieving the resolution and speed necessary to address mode conversion phenomena in full two-dimensional (2-D) toroidal geometry. These codes have been used in conjunction with theory and experimental data from the Alcator C-Mod [I. H. Hutchinson et al., Phys. Plasmas 1, 1511 (1994)] to gain new understanding into the nature of FWMC in tokamaks. The MPP version of TORIC is also now capable of running with sufficient resolution to model planned lower hybrid range of frequencies (LHRF) experiments in the Alcator C-Mod.