Lectre Series in Energetic Particle Physics of Fusion Plasmas在聚变等离子体的高能粒子物理讲座系列.pptVIP

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Lectre Series in Energetic Particle Physics of Fusion Plasmas在聚变等离子体的高能粒子物理讲座系列.ppt

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Lectre Series in Energetic Particle Physics of Fusion Plasmas在聚变等离子体的高能粒子物理讲座系列

Lecture Series in Energetic Particle Physics of Fusion Plasmas Guoyong Fu Princeton Plasma Physics Laboratory Princeton University Princeton, NJ 08543, USA A series of 5 lectures (1) Overview of Energetic Particle Physics in Tokamaks (today) (2) Tokamak equilibrium, shear Alfven wave equation, Alfven eigenmodes (Jan. 4) (3) Linear stability of energetic particle-driven modes (Jan. 5) (4) Nonlinear dynamics of energetic particle-driven modes (Jan. 6) (5) Summary and future direction for research in energetic particle physics (Jan. 8) Overview of Energetic Particle Physics in Tokamaks Tokamak basics Roles of energetic particles in fusion plasmas Single particle confinement Alfven continuum and shear Alfven eigenmodes Energetic particle-driven collective instabilities Nonlinear dynamics Summary Tokamak basics Tokamak is an axisymmetric torus with toroidal magnetic field produced by external coils and poloidal field produced by toroidal plasma current Both fields are necessary to confine charged particles or plasmas Tokamak equilibrium is achieved at The plasma is heated externally to reach high temperature at high density in order to reach fusion ignition (Pfusion Ploss) What are energetic particles Typical fusion plasmas have density nth~ 1020m-3and Tth~10kev Typical energetic particle energy Eh100kev Tth . In current tokamak devices, energetic particles are usually introduced by neutral beam injection (NBI heating) or by Radio Frequency wave heating (RF heating). In a fusion reactor, energetic alpha particles are produced by fusion reaction: D+T?a(3.5Mev)+n(14Mev) Energetic particles heat plasmas via Coulomb collisions (mainly heat electrons) and slow down to thermal energy. Roles of energetic particles in fusion plasmas Current fusion plasma research topics: MHD stability (beta limit) Transport (energy confinement) Wave heating and current drive (equilibrium) Edge physics (edge stability and confinement) Energetic Particle Physics (