Understanding the improved confinement still remain one of the major goals of the tokamak fusion program, and most important research schemes in tokamak relate to plasma confinement with auxiliary heating and current ...Understanding the improved confinement still remain one of the major goals of the tokamak fusion program, and most important research schemes in tokamak relate to plasma confinement with auxiliary heating and current drive. When auxiliary power exceeds a threshold value, L-H transition will take place. Theoreties and experiments show that this transition is concerned with the sheared plasma poloidal rotation in the edge. Whenan external electromagnetic wave is injected into plasma by antenna,展开更多
Recently, to save the current drive power and to obtain more favorable confinement merit for a tokamak reactor, large fraction of bootstrap current sustained equilibrium has attracted great interests both theoreticall...Recently, to save the current drive power and to obtain more favorable confinement merit for a tokamak reactor, large fraction of bootstrap current sustained equilibrium has attracted great interests both theoretically and experimentally. We use an powerful expanding technique and the tokamak ordering to expand the GSh-E to obtain a series of ordinary differential equations which allow for different sets of input profiles. The fully bootstrap current sustained tokamak equilibria are then solved analytically.展开更多
Recently, the L-mode to H-mode (L-H) transition in tokamak plasma confinement was found to be related to the presence of the poloidal flow shear near the plasma edge. An important mechanism is the ion orbit loss cause...Recently, the L-mode to H-mode (L-H) transition in tokamak plasma confinement was found to be related to the presence of the poloidal flow shear near the plasma edge. An important mechanism is the ion orbit loss caused by interaction with the limiter. A complementary explanation is the generation of poloidal flows by plasma fluctuations via the Reynolds stress and the poloidal spin-up of plasmas from poloidal asymmetryof particle and momentum sources.展开更多
An eight-shots pellet injection (PI) and a supersonic molecular beam injection (SMBI) system have proposed and developed on the HL-1M tokamak for advanced fuelling experiments. The peaked density profile and improved ...An eight-shots pellet injection (PI) and a supersonic molecular beam injection (SMBI) system have proposed and developed on the HL-1M tokamak for advanced fuelling experiments. The peaked density profile and improved confinement are typical feature of PI and SMBI discharge. It strongly depends on the wall recycling conditions of the HL-1M tokamak and injection parameters.展开更多
A tokamak plasma discharge involves a series of complex and concerted actions conducted by its control system. The HL-2A control system can be divided into two partst, the machine control system and the discharge cont...A tokamak plasma discharge involves a series of complex and concerted actions conducted by its control system. The HL-2A control system can be divided into two partst, the machine control system and the discharge control system. The machine control system, which consists of industrial PC (IPC), configures and operates the tokamak' s various technical subsystems. Timing sys-tem is integrated into machine control system giving absolute time for all subsystems. The discharge control system,展开更多
The scaling laws of energy confinement are very significant for confinement improvement. A typical scaling law of ohmic heating with low effective charge and radiation power is given by
文摘Understanding the improved confinement still remain one of the major goals of the tokamak fusion program, and most important research schemes in tokamak relate to plasma confinement with auxiliary heating and current drive. When auxiliary power exceeds a threshold value, L-H transition will take place. Theoreties and experiments show that this transition is concerned with the sheared plasma poloidal rotation in the edge. Whenan external electromagnetic wave is injected into plasma by antenna,
文摘Recently, to save the current drive power and to obtain more favorable confinement merit for a tokamak reactor, large fraction of bootstrap current sustained equilibrium has attracted great interests both theoretically and experimentally. We use an powerful expanding technique and the tokamak ordering to expand the GSh-E to obtain a series of ordinary differential equations which allow for different sets of input profiles. The fully bootstrap current sustained tokamak equilibria are then solved analytically.
文摘Recently, the L-mode to H-mode (L-H) transition in tokamak plasma confinement was found to be related to the presence of the poloidal flow shear near the plasma edge. An important mechanism is the ion orbit loss caused by interaction with the limiter. A complementary explanation is the generation of poloidal flows by plasma fluctuations via the Reynolds stress and the poloidal spin-up of plasmas from poloidal asymmetryof particle and momentum sources.
文摘An eight-shots pellet injection (PI) and a supersonic molecular beam injection (SMBI) system have proposed and developed on the HL-1M tokamak for advanced fuelling experiments. The peaked density profile and improved confinement are typical feature of PI and SMBI discharge. It strongly depends on the wall recycling conditions of the HL-1M tokamak and injection parameters.
文摘A tokamak plasma discharge involves a series of complex and concerted actions conducted by its control system. The HL-2A control system can be divided into two partst, the machine control system and the discharge control system. The machine control system, which consists of industrial PC (IPC), configures and operates the tokamak' s various technical subsystems. Timing sys-tem is integrated into machine control system giving absolute time for all subsystems. The discharge control system,
文摘The scaling laws of energy confinement are very significant for confinement improvement. A typical scaling law of ohmic heating with low effective charge and radiation power is given by