Upgrades to electronic hardware and detector design have been made to the JET thin-foil Faraday cup fast ion loss detector [Darrow et al., Rev. Sci. Instrum. 75, 3566 (2004)] in anticipation of the upcoming deuterium-tritium (DT) campaign. An improved foil stack design has been implemented, which greatly reduces the number of foil-to-foil shorts, and triaxial cabling has mitigated ambient noise pickup. Initial tests of 200 kHz digitizers, as opposed to the original 5 kHz digitizers, have provided enhanced analysis techniques and direct coherence measurements of fast ion losses with magnetohydrodynamic activity. We present recent loss measurements in JET deuterium plasmas correlated with kink modes, fishbone modes, edge-localized modes, and sawteeth. Sources of systematic noise are discussed with emphasis on capacitive plasma pickup. Overall, the system upgrades have established a diagnostic capable of recording alpha particle losses due to a wide variety of resonant fast ion transport mechanisms to be used in future DT-experiments and modeling efforts.

中文翻译：

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法拉第杯快速离子损失检测器和联合欧洲环面等离子体中磁流体动力学诱导的快速离子损失测量的改进

JET 薄箔法拉第杯快速离子损失检测器已对电子硬件和检测器设计进行了升级 [Darrow 等人，Rev. Sci. 仪器。75, 3566 (2004)] 期待即将到来的氘氚 (DT) 运动。已经实施了改进的箔堆叠设计，这大大减少了箔对箔短路的数量，并且三轴布线减轻了环境噪声拾取。与最初的 5 kHz 数字化仪相比，200 kHz 数字化仪的初始测试提供了增强的分析技术和具有磁流体动力学活动的快速离子损失的直接相干测量。我们介绍了与扭结模式、鱼骨模式、边缘局部模式和锯齿相关的 JET 氘等离子体的最近损耗测量。系统噪声源的讨论重点是电容式等离子体拾取。全面的，