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Recent advances in the LHD experiment
In the first four years of the LHD experiment, several encouraging results have emerged, the most significant of which is that MHD stability and good transport are compatible in the inward shifted… Expand
SCALINGS OF ENERGY CONFINEMENT AND DENSITY LIMIT IN STELLARATOR/HELIOTRON DEVICES
The paper presents a study of empirical scaling of energy confinement observed experimentally in stellarator/heliotron devices (Heliotron E, Wendelstein VII-A, L2, Heliotron DR) for plasmas heated by… Expand
Molecular Zeeman spectroscopy for H2 Fulcher-α band spectra as a local measurement of rovibrational structures
A diagnostic technique for the local measurement of emissions from the molecular hydrogen has been developed. In the presence of an external magnetic field, the emission position can be deduced from… Expand
Particle balance in long duration RF driven plasmas on QUEST
Global particle balance in non-inductive long-duration plasma on QUEST has been investigated. Approximately 70% of the fuel hydrogen (H) was retained in the wall and then was almost exhausted just… Expand
"Physical Design of MW-class Steady-state Spherical Tokamak, QUEST"
QUEST (R=0.68m, a=0.4m) focuses on the steady state operation of the spherical tokamak (ST) by controlled PWI and electron Bernstain wave (EBW) current drive (CD). The QUEST project will be developed… Expand
Formation of H-mode Like Transport Barrier in the CHS Heliotron / Torsatron
Overview of steady-state tokamak operation and current drive experiments in TRIAM-1M
Experiments aiming at ‘day long operation at high performance’ have been carried out. The record value of the discharge duration was updated to 5 h and 16 min. Steady-state tokamak operation (SSTO)… Expand
Steady-State Operation Scenario and the First Experimental Result on QUEST
QUEST focuses on the steady state operation of the spherical tokamak by controlled PWI and electron Bernstein wave current drive. One of the main purposes of QUEST is an achievement of long duration… Expand
Heating by an electron Bernstein wave in a spherical tokamak plasma via mode conversion.
The first successful high power heating of a high dielectric constant spherical tokamak plasma by an electron Bernstein wave (EBW) is reported. An EBW was excited by mode conversion (MC) of an mode… Expand
DISCOVERY OF ELECTRIC PULSATION IN A TOROIDAL HELICAL PLASMA