Modification of Tomography Technique for Two-Dimensional Spectroscopic Measurement in JT-60U Divertor Plasmas
نویسندگان
چکیده
منابع مشابه
Modelling of JT-60U Detached Divertor Plasma using SONIC code
The characteristics of the JT-60U detached divertor plasma in the SONIC simulation are investigated. With increasing mid-plane density, the electron temperature at the divertor decreases and the ion flux to the divertor plate increases. At higher densities, the temperature becomes less than 1 eV. However, rollover of the ion flux at the divertor plate, which is a characteristic of the detachmen...
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Deposition profiles of tungsten released from the outer divertor were studied in JT-60U. A neutron activation method was used for the first time to accurately measure deposited tungsten. Surface density of tungsten in the thick carbon deposition layer can be measured by this method. Tungsten was mainly deposited on the inner divertor (around inner strike points) and on the outer wing of the dom...
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Dynamics of ion internal transport barrier (ITB) formation and impurity transport both in the Large Helical Device (LHD) heliotron and JT-60U tokamak are described. Significant differences between heliotron and tokamak plasmas are observed. The location of the ITB moves outward during the ITB formation regardless of the sign of magnetic shear in JT-60U and the ITB becomes more localized in the ...
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The dynamics and stability of the resistive wall mode (RWM) are investigated in the JT-60U high-β plasmas, and the sustainment of high-β plasmas above the ideal no-wall β-limit βno-wall N has been demonstrated using a plasma rotation. To suppress an n = 1 RWM that limits the achievable βN in the regime βN > βno-wall N , the plasma rotation is kept larger than the critical rotation. Therefore, w...
متن کاملCharacteristics of Internal Transport Barrier in JT-60U Reversed Shear Plasmas
Characteristics of internal transport barrier (ITB) structure are studied and the active ITB control has been developed in JT-60U reversed shear plasmas. The following results are found. Outward propagation of the ITB with steep Ti gradient is limited to the minimum safety factor location (ρqmin). However the ITB with reduced Ti gradient can move to the outside of ρqmin. Lower boundary of ITB w...
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ژورنال
عنوان ژورنال: Plasma and Fusion Research
سال: 2007
ISSN: 1880-6821
DOI: 10.1585/pfr.2.s1121