Improvement of JT-60U negative ion source performance
نویسندگان
چکیده
منابع مشابه
Dynamics of ion internal transport barrier in LHD heliotron and JT-60U tokamak plasmas
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 ...
متن کاملStudy of Ion Cyclotron Emissions due to DD Fusion Product Ions on JT-60U
In this paper, ion cyclotron emissions (ICEs) due to deuterium-deuterium (DD) fusion-product (FP) He, T and P-ions on JT-60U are described. Electromagnetic waves with finite toroidal wave numbers are detected by using ion cyclotron range of frequency antennas as pickup loops. The toroidal wave numbers are evaluated from the phase differences between two antenna straps arrayed in the toroidal di...
متن کاملModelling 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...
متن کاملParticle simulation of bursting Alfvén modes in JT-60U
The results of particle-in-cell simulations of a negative neutral beam heated Alfvén-mode experiment in the Japan Atomic Energy Research Institute Tokamak-60 Upgrade JT-60U H. Ninomiya et al., Fusion Sci. Technol. 42, 7 2002 ; A. Kitsunezaki et al., ibid. 42, 179 2002 are presented. They seem to match quite well the dynamics of the abrupt large-amplitude event ALE experimentally observed in the...
متن کاملDevelopment of Long Pulse Neutral Beam Injector on JT-60U for JT-60SA
The paper reports the progress of R&D toward the JT-60SA at Japan Atomic Energy Agency (JAEA) during 2006-2008. Significant progress has been made in the long pulse operation of the negative-ion-based NBI (N-NBI) where a 10 MW D beam is required to be injected for 100s in JT-60SA. The injection pulse length has been successfully extended from 20s in the last campaign to 30s of the heating time ...
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ژورنال
عنوان ژورنال: Nuclear Fusion
سال: 2001
ISSN: 0029-5515
DOI: 10.1088/0029-5515/41/5/312