For power plants heliotron-type reactors have attractive advantages, such asno current-disruptions, no current-drive, and wide space between helical coils for the maintenanceof in-vessel components. However, one disad...For power plants heliotron-type reactors have attractive advantages, such asno current-disruptions, no current-drive, and wide space between helical coils for the maintenanceof in-vessel components. However, one disadvantage is that a major radius has to be large enough toobtain large Q-value or to produce sufficient space for blankets. Although the larger radius isconsidered to increase the construction cost, the influence has not been understood clearly, yet.Scale effects on superconducting magnet systems have been estimated under the conditions of aconstant energy confinement time and similar geometrical parameters. Since the necessary magneticfield with a larger radius becomes lower, the increase rate of the weight of the coil support to themajor radius is less than the square root. The necessary major radius will be determined mainly bythe blanket space. The appropriate major radius will be around 13 m for a reactor similar to theLarge Helical Device (LHD).展开更多
Parameters of self-consistent magnetized dusty sheaths are investigated usingcomputer simulations of a temporal evolution of one-dimensional slab plasma with dust particles.The evolution is caused by a collection of e...Parameters of self-consistent magnetized dusty sheaths are investigated usingcomputer simulations of a temporal evolution of one-dimensional slab plasma with dust particles.The evolution is caused by a collection of electrons and ions by both a wall (electrode) and dustparticles, which are initially immersed into plasma and distributed in front of the electrode.Obtained results show the existence of oscillations of a self-consistent potential in magnetizeddusty sheaths including boundary potentials. Dust particles weaken magnetized sheaths and createadditional sheaths close to a boundary of dust particles. The magnetic field does not influence onthe dust particle charge.展开更多
文摘For power plants heliotron-type reactors have attractive advantages, such asno current-disruptions, no current-drive, and wide space between helical coils for the maintenanceof in-vessel components. However, one disadvantage is that a major radius has to be large enough toobtain large Q-value or to produce sufficient space for blankets. Although the larger radius isconsidered to increase the construction cost, the influence has not been understood clearly, yet.Scale effects on superconducting magnet systems have been estimated under the conditions of aconstant energy confinement time and similar geometrical parameters. Since the necessary magneticfield with a larger radius becomes lower, the increase rate of the weight of the coil support to themajor radius is less than the square root. The necessary major radius will be determined mainly bythe blanket space. The appropriate major radius will be around 13 m for a reactor similar to theLarge Helical Device (LHD).
基金The project partially supported by the Science and Technology Center in Ukraine(project NN-37)
文摘Parameters of self-consistent magnetized dusty sheaths are investigated usingcomputer simulations of a temporal evolution of one-dimensional slab plasma with dust particles.The evolution is caused by a collection of electrons and ions by both a wall (electrode) and dustparticles, which are initially immersed into plasma and distributed in front of the electrode.Obtained results show the existence of oscillations of a self-consistent potential in magnetizeddusty sheaths including boundary potentials. Dust particles weaken magnetized sheaths and createadditional sheaths close to a boundary of dust particles. The magnetic field does not influence onthe dust particle charge.
