Recent progress in the development of intensive neutron sources and required peripheral equipment has enabled high-spatial-resolution imaging that is simultaneously energy-resolved. The authors demonstrate a high-speed neutron-imaging system with cutting-edge superconducting detector. This detector potential not just for applications requiring high spatial resolution, but also two-dimensional detectors other kinds beams, by adopting an adequate conversion layer.

Abstract In this paper, we propose a new control strategy for an antilock braking system (ABS) to maintain the force at maximum. The popularization of ABS that prevents wheels from locking has resulted in improvement vehicle stability and shortening distance. Further is anticipated if maximization realized. We found interesting phenomenon which characteristics resonance composed body wheel road surface reflects slip condition surface. Using phenomenon, realized method maintaining maximum value force.

In order to increase the transfer efficiency in a metal V-belt type CVT (Continuously Variable Transmission), it is effective lower belt clamping force from current setting value. However, too low will cause macro slip (large slip). Thus, set proper level, friction characteristics between and pulley (belt characteristics) must be understood detail, threshold defined. this paper, we shall propose expression model for use explain speed reducing ratio dependence of maximum coefficient (μmax)....

We demonstrate neutron detection using a solid-state 3He-free superconducting current-biased kinetic inductance detector (CB-KID), which consists of Nb meander line and 10B absorption layer. The CB-KID is based on the transient process Cooper pairs induced by nuclear reaction between neutrons. Therefore, can be operated in wide region bias current–temperature diagram, as demonstrated this paper. change induces electromagnetic wave pulse under DC current. signal propagates along toward both...

Physics and engineering designs of Chinese First Quasi-axisymmetric Stellarator (CFQS) have been performed under the collaboration between National Institute for Fusion Science Southwest Jiaotong University.To obtain high plasma parameter to study beam ion confinement in quasi-axisymmetric configuration, installation neutral (NB) injector is planned with CFQS.The feasibility NB injection CFQS by means deposition calculation code (HFREYA) guiding center orbit following (DELTA5D).The angle 48...

Characteristics of the new vertical neutron camera (VNC3) installed for study energetic-particle transport in relatively low emission rate (Sn) Large Helical Device (LHD) deuterium plasma is investigated. Dependence signal VNC3 operating with current mode on Sn shows that accurate obtained using range 10ms time bin where error counts first (VNC1) pulse counting significantly large. Time-resolved measurements profiles beam heated plasmas are performed. Although line-integrated by wider due to...

Neutral beam (NB) fast-ion loss mechanisms in the large helical device (LHD) are investigated by combination of neutron measurement, classical slowing-down simulation, and neo-classical guiding center orbit following simulation. It is found that transport provides little contribution to tangentially injected NB fast-ions. For perpendicularly fast-ions, has more than 40% fast ion loss. These results indicate there other dominant LHD plasmas. The charge exchange one plausible candidates for mechanism.

A tangential Fast-Ion D Alpha (FIDA) diagnostic is applied to the Large Helical Device (LHD) in order observe energetic distribution of toroidal circulating particles which are produced by Negative Neutral Beams (NNB). perpendicular Positive NB (PNB) used as probe beam tangential-FIDA this observation geometry. In assess appropriateness diagnostic, experimental result was compared with a Silicon-diode-based Fast Analyzer (Si-FNA) installed on same line sight. As comparison, and Si-FNA data...

A neutral beam injection heating simulation of time-development plasma in the Large Helical Device high-ion-temperature experiment is presented. The effects density and temperature on ion birth profile slowing-down are considered using a new code, GNET-TD, which based GNET. results show that heat deposition to ions increases core region when decays after pellet injection.

The effect of impurity ions on NBI heating is numerically investigated in LHD plasmas. Helium and carbon are the two species considered simulation. Fast-ion birth rates with various fractions calculated using HFREYA code, taking into account ionization by electron ion impacts, charge exchanges ions. fast-ion rate found to increase increasing effective plasma tangential injection (beam energy: 180 keV) case, whereas decreased perpendicular one 40 keV). slowing down GNET considering Coulomb...

Abstract A new numerical method for designing the external coils of a stellarator is presented. In this method, shape filamentary expressed using fully three-dimensional B-spline curves that are not necessarily constrained on winding surface. The control points optimized together with coil position and current to minimize an objective function, which defined normal field components engineering constraints. genetic algorithm employed function arbitrary combinations modular, helical, circular...

Particle transport processes of impurity ions in a multi-ion-species plasma the Large Helical Device are investigated by neoclassical simulations. While quasi-linear gyrokinetic analyses indicate that anomalous contribution particle is radially inward-directed, it found external momentum sources can cause existence electron root with positive radial electric field and outward-directed flux ion.

In this study, we have investigated the heat transport of multi-ion species plasma by modifying and improving integrated simulation code TASK3D in LHD. The impurities electron hydrogen plasmas were assumed to be helium carbon. Turbulent is independent impurity density ratio. ion temperature, which higher for carbon than that helium, increases linearly as ratio increases. increment temperature due decrease effective neoclassical density. case lower

The integrated simulation code for helical plasmas, TASK3D, is improved to solve the particle transport equation and has been applied neutral beam injection (NBI) plasma of LHD. To we consider two types sources: ionization particles recycling gas beams by NBI heating. code, AURORA, incorporated calculate particles, source evaluated. heating evaluated FIT3D code. A with three turbulent models performed. We find that experimental results agree well constant model. heat have also performed be...

Neutral beam injection (NBI) heating simulations of Large Helical Device (LHD) plasma in the presence magnetic islands are performed using a drift kinetic equation solver, GNET. A perturbation that causes island with poloidal and toroidal mode numbers (m, n) = (1, 1) is considered. It found spatial distribution ions for counter-tangential NBI significantly modified near island, exhibiting strong dependency on phase island. The changes velocity space orbits transition particles imply an...

Abstract Research has repeatedly shown that people tend to conform local norms. In intergroup conflicts, where most group members engage in some type of aggressive behavior towards out‐group (out‐group aggression), individuals are predicted other in‐group engaging aggression. this study, we defined aggression was a result conformity as “conformity‐based aggression” and examined its emergence the possibility being observed by (in‐group audience) strengthens such an experimental setting. We...

Our preceding works reported the development of a high spatial and temporal resolution imaging system by using current biased kinetic inductance detector (CB-KID) with use delay-line technique. We called this as CB-KID, succeeded in neutron events caused nuclear reaction hot spots produced CB-KID system. It was essentially important for our proposal to superconducting stripline guide pulsed signal where propagates at constant fast velocity along stripline. In present study, we intend measure...

Beam-beam nuclear fusion reactions in the Large Helical Device (LHD) deuterium plasma are investigated by Global NEoclassical Transport (GNET) code, which can solve five-dimensional drift kinetic equation using Monte Carlo methods. We evaluate velocity space distribution of energetic deuterons to calculate reaction rates between beams. The calculated fraction beam-beam contribution is approximately 1.3% 1 MW heating power case and 6.7% 5 case, would not be negligible. rate depends on square...

The practicability of a statistically induced thermal transport model (fit to the database) by exploiting analyses database accumulated TASK3D-a (integrated analysis suite for LHD plasmas) is examined. promising results, such as reproduction measured ion temperature profiles and observed tendency, have been obtained through systematic comparison against plasmas. It encourages further pursue statistical approach modelling fusion