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ITER operation window determined from mutually consistent core-SOL-divertor simulations: definition and application

机译:由相互一致的核心-SOL-divertor仿真确定的ITER操作窗口:定义和应用

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摘要

An operating window for ITER is defined based on mutually consistent core-SOL-divertor modelling, in which the core turbulent transport is based on the Weiland formulation as incorporated into the multi-mode model. The window consists of five limits, one of which is the edge-based density limit based on divertor detachment. The predicted operating space is ample for ITER to fulfil its mission, reaching a maximum Q ≈ 60 at P_(alpha) ≈ 150 MW (65% of the edge-based density limit, 1.1 times the Greenwald limit), and a maximum P_(alpha) of 220 MW at Q ≈ 15 (90% of the edge-based density limit, 1.45 times the Greenwald limit). This operating window takes into account physics constraints and the technical constraints imposed by the divertor system, i.e. peak power load and attainable pumping speed, but does not include further constraints arising from other technological aspects of the ITER design, such as first wall cooling or shielding, which may further limit operation at high fusion power. The operating window is still compatible with the ITER mission if the magnetic field were reduced by 5% or if the underlying core transport were GLF-like rather than Weiland-like. A moderate reduction in helium exhaust or in pumping speed could be accommodated. Other changes in the operating window resulting from different technical or physical hypotheses are also evaluated.
机译:基于相互一致的堆芯-SOL-偏滤器建模来定义ITER的运行窗口,其中堆芯湍流传输基于纳入多模模型的Weiland公式。该窗口包括五个限制,其中之一是基于偏滤器分离的基于边缘的密度限制。预计的运行空间足以满足ITER的任务,在P_α≈150 MW时达到最大Q≈60(基于边缘的密度极限的65%,是格林瓦尔德极限的1.1倍),以及最大P_( Q≈15时为220兆瓦(α)(基于边缘的密度极限的90%,是格林瓦尔德极限的1.45倍)。该运行窗口考虑了物理限制和分流器系统施加的技术限制,即峰值功率负载和可达到的抽速,但不包括ITER设计的其他技术方面(例如第一壁冷却或屏蔽)引起的其他限制,这可能会进一步限制高融合功率下的运行。如果将磁场降低5%或基础堆芯的传输类似于GLF而不是Weiland,则操作窗口仍与ITER任务兼容。可以适当减少氦气排放量或抽速。还评估了由不同的技术或物理假设导致的操作窗口中的其他变化。

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