Comparison of long term fuel retention in JET between carbon and the ITER-Like Wall
Comparison of long term fuel retention in JET between carbon and the ITER-Like Wall
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DOI：
10.1016/j.jnucmat.2013.01.017
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发表时间：
2013-07
影响因子：
3.1
通讯作者：
T. Loarer;S. Brezinsek;V. Philipps;J. Bucalossi;D. Douai;H. Esser;S. Grünhagen;J. Hobirk;S. Ja
中科院分区：
文献类型：
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作者：
T. Loarer;S. Brezinsek;V. Philipps;J. Bucalossi;D. Douai;H. Esser;S. Grünhagen;J. Hobirk;S. Ja
在欧姆、L和H模式等离子体情况下，在具有ITER类壁的JET（JET-ILW）中进行了长期燃料保留实验，并与具有碳壁的前一阶段参考放电（JET-C）进行了比较。通过全球气体平衡评估长期燃料保持率，对于在一整天实验中进行的一系列重复脉冲（10-25），准确度为1.2%。与碳壁相比，对于L模式，JET-ILW的保留也从1.26× 1021 Ds − 1下降到4-8× 1019 Ds −1。最后，对于III型和I型ELMy H模，保持率分别从1.37× 1021 Ds − 1下降到7.2× 1019 Ds − 1和从1.7× 1021 Ds − 1下降到2.7× 1020 Ds − 1。与JET-ILW的保留率表现出约10倍的JET-C归因于减少的碳杂质和更少的燃料含量在Be共沉积相比，减少。
Long term fuel retention experiments have been performed in JET with the ITER- Like Wall (JET-ILW) and compared with reference discharges in the preceding phase with carbon wall (JET-C) in ohmic, L and H-mode plasma scenarios. The long term fuel retention is evaluated through global gas balance with an accuracy of 1.2% for series of repetitive pulses (10–25) carried out over a full day of experiments. Compared to carbon wall, with the JET-ILW, for L mode, the retention exhibits also a drop from 1.26×1021Ds−1to 4–8×1019Ds−1. Finally for Type III and type I ELMy H-mode, the retention decreases from 1.37×1021Ds−1to 7.2×1019Ds−1and from 1.7×1021Ds−1to 2.7×1020Ds−1respectively. The retention rates with the JET-ILW exhibit a decrease by a factor of about 10 compared to JET-C attributed to a reduction of carbon impurities and less fuel content in Be codeposition.