Observation of Spectral Broadening of Lower Hybrid Waves in Alcator C-Mod
نویسندگان
چکیده
منابع مشابه
Modification of H-mode pedestal structure with lower hybrid waves on Alcator C Mod
The application of lower hybrid waves (LH) in H-mode plasmas on Alcator C-Mod can result in significant reduction of core particle inventory, with no significant degradation of energy confinement. This phenomenon has been observed in steady enhanced Dα (EDA) H-mode targets, which are sustained by ion cyclotron RF auxiliary heating, in which pedestal density nped is usually tied firmly to plasma...
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The Lower Hybrid Current Drive (LHCD) system on Alcator C-Mod can produce spectra with a wide range of peak parallel refractive index (n||). An experiment in which LH power is square-wave modulated on a time scale much faster than the current relaxation time does not significantly alter the poloidal magnetic field inside the plasma and thus allows for realistic modeling and consistent plasma co...
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Lower hybrid current drive (LHCD) is an attractive tool for off-axis current profile control in magneticly confined tokamak plasmas and burning plasmas (ITER), because of its high current drive efficiency. The LHCD system on Alcator C-Mod operates at 4.6 GHz, with ∼ 1 MW of coupled power, and can produce a wide range of launched parallel refractive index (n ||) spectra. A 32 chord, perpendicula...
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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: Plasma and Fusion Research
سال: 2012
ISSN: 1880-6821
DOI: 10.1585/pfr.7.2402031