Investigation of RF-enhanced plasma potentials on Alcator C-Mod
نویسندگان
چکیده
منابع مشابه
RF Plasma Edge Interactions and Their Impact on ICRF Antenna Performance in Alcator C-Mod
In Alcator C-Mod, we have investigated the compatibility of high power ion cyclotron range of frequencies antenna with high performance plasmas and all high-Z plasma facing components, to provide operational information for future devices such as ITER. Boronization appears to be critical achieving low radiated power plasmas and is eroded rapidly such that the best performance is lost when the i...
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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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Introduction Understanding divertor detachment is essential to predicting the operation of future diverted tokamaks. The current plan for ITER operation assumes that the plasma is detached from the divertor, that f e be near the Greenwald limit [1] and that the main plasma is not diluted by impurities. However, we do not know whether these conditions can be achieved simultaneously. In this set ...
متن کاملOverview of the Alcator C-mod Program Overview of the Alcator C-mod Program
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: Journal of Nuclear Materials
سال: 2013
ISSN: 0022-3115
DOI: 10.1016/j.jnucmat.2013.01.189