To study helium(He)supersonic molecular beam injection(SMBI)into H-mode tokamak plasma,a simplified multicomponent-plasma model under the assumption of quasi-neutral condition is developed and implemented in the frame...To study helium(He)supersonic molecular beam injection(SMBI)into H-mode tokamak plasma,a simplified multicomponent-plasma model under the assumption of quasi-neutral condition is developed and implemented in the frame of BOUT++.The simulation results show that He species propagate inwards after He SMBI,and are deposited at the bottom of the pedestal due to intensive ionization and weak spreading speed.It is found that almost all injected helium particles strip off all the bounded electrons.He species interact intensively with background plasma along the injection path during He SMBI,making deuterium ion density profile drop at the He-deposited location and resulting in a large electron temperature decreasing,but deuterium ion temperature decreasing a little at the top of the pedestal.展开更多
The interaction between the supersonic molecular beam(SMB)and the low-temperature plasma is a critical issue for the diagnosis and fueling in the Tokamak device.In this work,the interaction process between the argon S...The interaction between the supersonic molecular beam(SMB)and the low-temperature plasma is a critical issue for the diagnosis and fueling in the Tokamak device.In this work,the interaction process between the argon SMB and the argon plasma is studied by a high-speed camera based on the Linear Experimental Advanced Device(LEAD)in Southwestern Institute of Physics,China.It is found that the high-density SMB can extinct the plasma temporarily and change the distribution of the plasma density significantly,while the low-density SMB can hardly affect the distribution of plasma density.This can be used as an effective diagnostic technique to study the evolution of plasma density in the interaction between the SMB and plasma.Moreover,the related simulation based on this experiment is carried out to better understand the evolution of electron density and ion density in the interaction.The simulation results can be used to analyze and explain the experimental results well.展开更多
基金Chunhui Program of the Ministry of Education of China(Grant No.Z2017091)the Sichuan Provincial Science Foundation for Distinguished Young Leaders of Disciplines in Science and Technology,China(Grant Nos.2019JDJQ0051 and 2019JDJQ0050)+2 种基金the National Natural Science Foundation of China(Grant Nos.11575055 and 11605143)the Fund for Young Scientists of China,the Open Research Subjects of the Key Laboratory of Advanced Computation in Xihua University,China(Grant Nos.szjj2017-011 and szjj2017-012)the Young Scholarship Plan of Xihua University,China(Grant No.0220170201).
文摘To study helium(He)supersonic molecular beam injection(SMBI)into H-mode tokamak plasma,a simplified multicomponent-plasma model under the assumption of quasi-neutral condition is developed and implemented in the frame of BOUT++.The simulation results show that He species propagate inwards after He SMBI,and are deposited at the bottom of the pedestal due to intensive ionization and weak spreading speed.It is found that almost all injected helium particles strip off all the bounded electrons.He species interact intensively with background plasma along the injection path during He SMBI,making deuterium ion density profile drop at the He-deposited location and resulting in a large electron temperature decreasing,but deuterium ion temperature decreasing a little at the top of the pedestal.
基金National Natural Science Foundation of China(Grant Nos.11575121,11275133,and 11575055)the National Magnetic Confinement Fusion Program of China(Grant No.2014GB125004).
文摘The interaction between the supersonic molecular beam(SMB)and the low-temperature plasma is a critical issue for the diagnosis and fueling in the Tokamak device.In this work,the interaction process between the argon SMB and the argon plasma is studied by a high-speed camera based on the Linear Experimental Advanced Device(LEAD)in Southwestern Institute of Physics,China.It is found that the high-density SMB can extinct the plasma temporarily and change the distribution of the plasma density significantly,while the low-density SMB can hardly affect the distribution of plasma density.This can be used as an effective diagnostic technique to study the evolution of plasma density in the interaction between the SMB and plasma.Moreover,the related simulation based on this experiment is carried out to better understand the evolution of electron density and ion density in the interaction.The simulation results can be used to analyze and explain the experimental results well.
