ELM energy and particle losses and their extrapolation to burning plasma experiments
ELM energy and particle losses and their extrapolation to burning plasma experiments
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DOI：
10.1016/s0022-3115(02)01398-3
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发表时间：
2003-03
影响因子：
3.1
通讯作者：
A. Loarte;G. Saibene;R. Sartori;M. Becoulet;L. Horton;T. Eich;A. Herrmann;M. Laux;G. Matthews;S. Jachmich;N. Asakura;A. Chankin;A. Leonard;G. Porter;G. Federici;M. Shimada;M. Sugihara;G. Janeschitz
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文献类型：
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作者：
A. Loarte;G. Saibene;R. Sartori;M. Becoulet;L. Horton;T. Eich;A. Herrmann;M. Laux;G. Matthews;S. Jachmich;N. Asakura;A. Chankin;A. Leonard;G. Porter;G. Federici;M. Shimada;M. Sugihara;G. Janeschitz
对现有实验的I型ELM的分析表明，ELM的能量损失随着基座等离子体碰撞度(ν∗PED)和/或τ前沿∥的增加而减小，其中τ∥前沿=2πRq95/cs，PED是典型的离子从基座到偏滤器靶的输运时间。ν∗Ped和τ∥不是影响ELMS的唯一参数，边缘磁切变也影响ELMS影响的等离子体体积。ELM粒子损失受ELM影响体积的影响，并且弱依赖于其他基座等离子体参数。在JET和DIII-D的某些条件下，观测到了具有ITER可接受的能量损失的“最小”I型ELM，其中在ELM期间等离子体温度分布没有变化。偏滤器ELM功率脉冲的持续时间与τ波前∥有很好的相关性，而与ELM相关的磁流体活动的持续时间无关。同样，榆树粒子通量的时间尺度也由τ前沿∥确定。总结了目前实验结果对ITER的外推。
Analysis of Type I ELMs from present experiments shows that ELM energy losses decrease with increasing pedestal plasma collisionality (ν∗ped) and/or increasing τFront∥, where (τ∥Front=2πRq95/cs,ped) is the typical ion transport time from the pedestal to the divertor target. ν∗pedand τFront∥are not the only parameters that affect the ELMs, also the edge magnetic shear influences the plasma volume affected by the ELMs. ELM particle losses are influenced by this ELM affected volume and are weakly dependent on other pedestal plasma parameters. ‘Minimum’ Type I ELMs, with energy losses acceptable for ITER, where there is no change in the plasma temperature profile during the ELM, are observed for some conditions in JET and DIII-D. The duration of the divertor ELM power pulse is well correlated with τFront∥and not with the duration of the ELM-associated MHD activity. Similarly, the time scale of ELM particle fluxes is also determined by τFront∥. The extrapolation of present experimental results to ITER is summarised.