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首页> 外文期刊>Plasma physics and controlled fusion >A high-repetition rate edge localised mode replication system for the Magnum-PSI and Pilot-PSI linear devices
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A high-repetition rate edge localised mode replication system for the Magnum-PSI and Pilot-PSI linear devices

机译：Magnum-PSI和Pilot-PSI线性设备的高重复率边缘本地化模式复制系统

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摘要

A high-power edge-localized mode (ELM) striking onto divertor components presents one of the strongest lifetime and performance challenges for plasma facing components in future fusion reactors. A high-repetition-rate ELM replication system has been constructed and was commissioned at the Magnum-PSI linear device to investigate the synergy between steady state plasma exposure and the large increase in heat and particle flux to the plasma facing surface during repeated ELM transients in conditions aiming to mimic as closely as possible those in the ITER divertor. This system is capable of increasing the electron density and temperature from ～1 × 10~(20) m~(?3) to ～1 × 10~(21) m~(?3) and from 1 to 5 eV respectively, leading to a heat flux increase at the surface to ～130MWm~(?2). By combining Thomson scattering measurements with heat fluxes determined using the THEODOR code, the sheath heat transmission factor during the pulses was determined to be ≈7.7, in agreement with sheath theory. The heat flux is found to be linearly dependent upon the strength of the magnetic field at the target position, and, by adapting the system to Pilot-PSI, tests at 1.6 T showed heat fluxes of more than 600MWm~(?2). This gives confidence that with the installation of a 2.5 T superconducting magnetic solenoid at Magnum-PSI the heat flux will reach the ITER-relevant gigawatt per square metre heat flux regime.
机译：撞击偏滤器组件的高功率边缘定位模式（ELM）提出了未来聚变反应堆中面向等离子体组件的最强寿命和性能挑战之一。已经建立了一个高重复率的ELM复制系统，并在Magnum-PSI线性设备上调试了该系统，以研究稳态等离子体暴露与重复ELM瞬态过程中面对等离子体的表面的热量和粒子通量的大量增加之间的协同作用。旨在尽可能模仿ITER转向器的条件。该系统能够将电子密度和温度分别从〜1×10〜（20）m〜（？3）和〜1×10〜（21）m〜（？3）以及从1 eV升高到5 eV。表面的热通量增加到〜130MWm〜（？2）。通过将Thomson散射测量结果与使用THEODOR码确定的热通量相​​结合，可以确定脉冲期间的鞘层传热系数约为7.7，与鞘层理论一致。发现热通量与目标位置处的磁场强度呈线性关系，并且通过使系统适应Pilot-PSI，在1.6 T下的测试显示热通量超过600MWm〜（？2）。这使人们确信，在Magnum-PSI安装2.5 T超导电磁螺线管后，热通量将达到与ITER相关的千兆瓦/平方米热通量范围。

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