Two-dimensional full-wave simulation of microwave reflectometry on Alcator C-Mod
نویسندگان
چکیده
منابع مشابه
Two-dimensional full wave simulation of microwave reflectometry on Alcator C-Mod
A new 2-D full-wave code has been developed to simulate ordinary (O) mode reflectometry signals caused by plasma density fluctuations. The code uses the finite-difference time-domain method with a perfectly-matched-layer absorption boundary to solve Maxwell’s equations. Huygens wave sources are incorporated to generate Gaussian beams. The code has been used to simulate the reflectometer measure...
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The finite element method (FEM) has the potential of simulating plasma waves seamlessly from the core to the vacuum and antenna regions. We explored the possibility of using a versatile FEM solver package, COMSOL, for lower hybrid (LH) wave simulation. Special care was paid to boundary conditions to satisfy toroidal symmetry. The non-trivial issue of introducing hot plasma effects was addressed...
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The high neutral densities and short neutral mean free paths in the Alcator C-Mod divertor have provided a unique testing ground for our understanding of the role of neutrals in a tokamak. The high neutral pressures found in the C-Mod divertor can only be reproduced in models by including such collisional processes as ion-neutral and neutral-neutral collisions, neutral viscosity, as well as tak...
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Research on the Alcator C-Mod tokamak has emphasized RF heating, self-generated flows, momentum transport, scrape-off layer turbulence and transport and the physics of transport barrier transitions, stability and control. The machine operates with PRF up to 6 MW corresponding to power densities on the antenna of 10 MW/m. Analysis of rotation profile evolution, produced in the absence of externa...
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The Rydberg series (1s – 1snp) up to n=14 of helium-like argon (Z=18) has been observed from Alcator C-Mod plasmas using a high resolution x-ray spectrometer array. High n satellites to these lines of the form 1s2s – 1s2snp and 1s2p – 1s2pnp with 3 ≤ n ≤ 12 have been recorded. X-ray spectra of 2l nl′ transitions with 3 ≤ n ≤ 18 in molybdenum (Z=42) and 3 ≤ n ≤ 12 in krypton (Z=36) and niobium (...
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ژورنال
عنوان ژورنال: Review of Scientific Instruments
سال: 2001
ISSN: 0034-6748,1089-7623
DOI: 10.1063/1.1323249