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Overview of the JET preparation for deuterium-tritium operation with the ITER like-wall

机译:使用ITER相似壁进行氘-操作的JET准备工作概述

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For the past several years, the JET scientific programme (Pamela et al 2007 Fusion Eng. Des. 82 590) has been engaged in a multi-campaign effort, including experiments in D, H and T, leading up to 2020 and the first experiments with 50%/50% D-T mixtures since 1997 and the first ever D-T plasmas with the ITER mix of plasma-facing component materials. For this purpose, a concerted physics and technology programme was launched with a view to prepare the D-T campaign (DTE2). This paper addresses the key elements developed by the JET programme directly contributing to the D-T preparation. This intense preparation includes the review of the physics basis for the D-T operational scenarios, including the fusion power predictions through first principle and integrated modelling, and the impact of isotopes in the operation and physics of D-T plasmas (thermal and particle transport, high confinement mode (H-mode) access, Be and W erosion, fuel recovery, etc). This effort also requires improving several aspects of plasma operation for DTE2, such as real time control schemes, heat load control, disruption avoidance and a mitigation system (including the installation of a new shattered pellet injector), novel ion cyclotron resonance heating schemes (such as the three-ions scheme), new diagnostics (neutron camera and spectrometer, active Alfven eigenmode antennas, neutral gauges, radiation hard imaging systems...) and the calibration of the JET neutron diagnostics at 14 MeV for accurate fusion power measurement. The active preparation of JET for the 2020 D-T campaign provides an incomparable source of information and a basis for the future D-T operation of ITER, and it is also foreseen that a large number of key physics issues will be addressed in support of burning plasmas.
机译:在过去的几年中,JET科学计划(Pamela等人2007 Fusion Ens。Des.82590)参与了多个活动,包括D,H和T的实验,直到2020年以及第一个实验自1997年以来采用50%/ 50%的DT混合物,并且是首个采用ITER的面向等离子体的成分材料的DT等离子体。为此目的,发起了一个协调一致的物理和技术计划,以准备D-T运动(DTE2)。本文论述了由JET计划开发的,直接有助于D-T准备的关键要素。紧张的准备工作包括对DT运行场景的物理基础进行回顾,包括通过第一性原理和综合建模预测聚变功率,以及同位素对DT等离子体运行和物理的影响(热和粒子传输,高约束模式) (H模式)访问,Be和W腐蚀,燃料回收等)。这项工作还需要改善DTE2的等离子体操作的多个方面,例如实时控制方案,热负荷控制,避免扰动和缓解系统(包括安装新的碎粒注入器),新型离子回旋加速器共振加热方案(例如作为三离子方案),新的诊断程序(中子相机和光谱仪,有源Alfven本征模式天线,中性仪表,辐射硬成像系统...)以及在14 MeV下对JET中子诊断程序的校准,以进行精确的聚变功率测量。为2020年D-T运动进行的JET的积极准备提供了无与伦比的信息来源,并为ITER的未来D-T行动奠定了基础,并且还可以预见到将解决大量关键物理问题以支持燃烧等离子体。

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