[PDF] Top 20 Ion Heating Experiments Using Perpendicular Neutral Beam Injection in the Large Helical Device

... with beam current during beam injection, which is shown in ...The beam fueling calculated by the FIT code [14] is consistent with the experimental results, and is also shown in ...to ... See full document

... deuterium experiments in the Large Helical Device (LHD) and the introduction of wide-band and long-time data acquisition ...of Ion Cyclotron Emissions (ICEs) driven by ... See full document

... keV) perpendicular neu- tral beam (NBI4A and NBI4B) was injected along with the ion cyclotron range of frequency (ICRF) from t = ...cyclotron heating (ECH) turn-off), with superposition of ... See full document

... This paper reviews various global instabilities destabilized by tangential neutral beam injection (NBI) in the Large Helical Device (LHD) plasmas. These global modes are toroidal ... See full document

... In experiments at the GOL-3 device it was demon- strated that axial injection of high power electron beam with energy 1 MeV and current of 20 kA during 1 ms into linear device with a ... See full document

... negative-NBI heating successfully ex- tended the LHD parameter regime for high-nτT , high- density, and high-β plasmas, the achieved ion tempera- ture was less than 2 - 3 keV in hydrogen discharges be- ... See full document

... the Large Helical ...the ion (electron) flows consist of the E × B and ion (electron) diamagnetic drift ...compensated using a finite beta equilibrium. Experiments with different ... See full document

... the Large Helical Device (LHD), deuterium exper- iments have been performed by using tangentially-injected neutral beams (NBs) with the ∼ 180 keV deuterium and perpendicularly-injected ... See full document

... vertical injection antenna system consists of two or four millimeter-wave focusing and steering ...designed beam- waist size of 15 mm in radial and 50 mm in toroidal di- rections for the upper-port antennas ... See full document

... heavy ion beam probe (HIBP) in the Large Helical Device ...tangential neutral beam injection (NBI) phase, just after the switch from tangential to ... See full document

... inant helical magnetic component, B (1,4) . In order to break the helical symmetry, however, the mirror configuration of HSX includes two additional toroidal mirror magnetic components, B (0,4) and B (0,8) ... See full document

... fast ion angular distribution in comparison to that with an inward-shifted configura- ...effective heating and bet- ter ion confinement, the inward-shifted configuration with a co-injected NBI is ... See full document

... Gaussian beam using vertical and horizontal an- tenna systems with quasi-optical ...The beam-waist radius at the focal point is 15-30 ...total injection power achieved is 2.1 MW. In the ... See full document

... the Large Helical Device (LHD) using short pulse injections of neutral beams ...evaluated using the fast neutral decay times after NB turn-off, where the neutrals are ... See full document

... charge-coupled device (CCD) to measure the density, and an optical fiber bundle coupled with photomultiplier tubes (PMTs) is used to mea- sure the fluctuation, from the outer port on the equatorial plane through ... See full document

... side injection in the Large Helical Device ...to helical variation of the magnetic field ...in helical configurations, the parallel scale length of the gradient variation is ... See full document

... after one shot (3-second pulse). Using this data, the time evolution of γ-ray dose rate during an experimental series was calculated by summing up the contributions of each shot. Figure 6 shows the results of one ... See full document

... helps in optimizing pellet fueling. As for the understand- ing of pellet ablation, the identification of position of the pellet ablation is of great importance. In the LHD, a three dimensional observation system for ... See full document

... In helical systems, e-ITB formation has been explained in association with the transition of the radial electric field from negative (ion root) to positive (electron root) and has been induced by centrally ... See full document

... (RF) heating of fusion plasmas in the ion cyclotron range of frequencies (ICRF) is now being widely applied to fusion experiments around the ... See full document