论文标题
非轴对称磁流失动力冲洗后失控的电子电流重建
Runaway electron current reconstitution after a non-axisymmetric magnetohydrodynamic flush
论文作者
论文摘要
在最近的JET和DIII-D实验中，有令人信服地证明了Mega-Ampere（MA）水平失控电流的良性终止，并确立了对ITER失控减轻失控的领先候选人的确定。这是通过沿着随机磁场线的平行流损失沿全球磁性水力动力学不稳定性形成的，以平行流损失的形式出现，发现与低量子的注入相关，该注射从后速率后血浆中清除了高Z杂质。在这里，我们显示了竞争性的物理学，该物理是在类似iTer的反应堆中浮动后的流量重建后的重建。发现被困的``Runaway''被发现占据了失控的重建的播种，而高Z杂质的不完整清除有助于排出种子，但产生了更有效的雪崩，其中两个竞争在当前的降落中产生2-3〜MA阶梯，然后再降低了等离子体的重新集合。
Benign termination of mega-ampere (MA) level runaway current has been convincingly demonstrated in recent JET and DIII-D experiments, establishing it as a leading candidate for runaway mitigation on ITER. This comes in the form of a runaway flush by parallel streaming loss along stochastic magnetic field lines formed by global magnetohydrodynamic instabilities, which are found to correlate with a low-Z injection that purges the high-Z impurities from a post-thermal-quench plasma. Here we show the competing physics that govern the post-flush reconstitution of the runaway current in a ITER-like reactor where significantly higher current is expected. The trapped ``runaways'' are found to dominate the seeding for runaway reconstitution, and the incomplete purge of high-Z impurities helps drain the seed but produces a more efficient avalanche, two of which compete to produce a 2-3~MA step in current drop before runaway reconstitution of the plasma current.
