Physics analyses on the core plasma properties in the helical fusion DEMO reactor FFHR-d1
Physics analyses on the core plasma properties in the helical fusion DEMO reactor FFHR-d1
复制标题
螺旋聚变DEMO反应堆FFHR-d1中核心等离子体特性的物理分析
DOI：
10.1088/0029-5515/54/4/043010
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
A. Sagara and the FFHR Design Group
中科院分区：
文献类型：
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作者：
J. Miyazawa;Y. Suzuki;S. Satake;R. Seki;Y. Masaoka;S. Murakami;M. Yokoyama;Y. Narushima;M. Nunami;T. Goto;C. Suzuki;I. Yamada;R. Sakamoto;H. Yamada;A. Sagara and the FFHR Design Group
利用从大螺旋装置外推的径向分布，对螺旋聚变DEMO反应堆FFHR-d1的磁流体力学平衡、新经典输运和α粒子约束进行了物理评估。由于FFHR-d1的高β特性，预计其会产生较大的Shafranov位移。这导致新古典输运和α粒子约束的恶化。等离子体位置控制使用垂直磁场已被检查，并证明是有效的Shafranov移位缓解。特别地，在高纵横比配置中，可以通过施加适当的垂直磁场来保持磁性表面类似于具有108%的高中心β的真空中的磁性表面。只要Shafranov位移被减轻，新古典热损失可以保持在与α加热功率兼容的水平。如果α粒子的损失边界在包层表面上并且适当地应用等离子体位置控制，则α粒子损失也可以保持在低水平。α粒子的丢失位置位于FFHR-d1中位于包层后面的偏滤器区域周围。
Physics assessments on magnetohydrodynamics equilibrium, neoclassical transport and alpha particle confinement have been carried out for the helical fusion DEMO reactor FFHR-d1, using radial profiles extrapolated from the Large Helical Device. Large Shafranov shift is foreseen in FFHR-d1 due to its high-beta property. This leads to deterioration in neoclassical transport and alpha particle confinement. Plasma position control using vertical magnetic field has been examined and shown to be effective for Shafranov shift mitigation. In particular, in the high-aspect-ratio configuration, it is possible to keep the magnetic surfaces similar to those in vacuum with high central beta of∼ 8% by applying a proper vertical magnetic field. As long as the Shafranov shift is mitigated, the neoclassical heat loss can be kept at a level compatible with the alpha heating power. The alpha particle loss can also be kept at a low level if the loss boundary of alpha particles is on the blanket surface and the plasma position control is properly applied. The lost positions of alpha particles are localized around the divertor region that is located behind the blanket in FFHR-d1.