Particle simulation of detached plasma in the presence of diffusive particle loss and radiative energy loss
Particle simulation of detached plasma in the presence of diffusive particle loss and radiative energy loss
复制标题
存在扩散粒子损失和辐射能量损失的情况下分离等离子体的粒子模拟
DOI：
10.1016/s0022-3115(00)00452-9
复制
发表时间：
2001
影响因子：
3.1
通讯作者：
K. Shimizu
中科院分区：
文献类型：
--
作者：
T. Takizuka;M. Hosokawa;K. Shimizu
用粒子模拟程序PARASOL研究了扩散粒子损失和辐射能量损失对分离等离子体形成的影响。偏滤器板附近的密度降低的扩散，和温度降低的辐射。由于在平板附近产生超音速流动，温度下降并不使密度变高。超音速流动的条件是C（R r/Rp）Tplate/Tthroat<1（R r：粒子通量放大因子; Rp：动量通量减小因子; Tplate：平板处的温度; Tthroat：喉部处的温度），平板处的马赫数为M=C−1+ C−2−1，大于1。仿真结果与该表达式吻合较好。讨论了扩散/辐射与分离等离子体的关系，由于超声速流的低密度，容易导致分离。
The effect of diffusive particle loss and radiative energy loss on the formation of detached plasma is studied by using a particle simulation code PARASOL. The density near the divertor plate is decreased by the diffusion, and temperature is decreased by the radiation. The temperature drop does not make the density high, because of the generation of supersonic flow near the plate. The condition of the supersonic flow is C≡(RΓ/Rp) Tplate/Tthroat<1 (RΓ: particle flux amplification factor; Rp: momentum flux reduction factor; Tplate: temperature at the plate; Tthroat: temperature at the throat), and the Mach number at the plate is given as M=C−1+ C−2−1 , which is larger than unity. The simulation results agree well with this expression. The relation between diffusion/radiation and the detached plasma is discussed; low density due to the supersonic flow can bring about the detachment easily.