In situ calibration of neutral beam port-through power and estimation of neutral beam deposition on LHD
In situ calibration of neutral beam port-through power and estimation of neutral beam deposition on LHD
复制标题
中性束端口通过功率的原位校准和 LHD 上中性束沉积的估计
DOI：
10.1063/1.1319867
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发表时间：
2001
影响因子：
1.6
通讯作者：
O. Motojima
中科院分区：
文献类型：
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作者：
M. Osakabe;Y. Takeiri;K. Tsumori;S. Murakami;O. Kaneko;K. Ikeda;Y. Oka;E. Asano;T. Kawamoto;R. Akiyama;K. Kawahata;A. Komori;N. Inoue;Y. Yonezu;N. Ohyabu;O. Motojima
在大型螺旋装置 (LHD) 上定期监测中性束 (NB) 穿透轮廓，以校准 NB 的端口通过功率并评估 LHD 等离子体的 NB 沉积功率。该轮廓通过 LHD 真空容器内 NB 计数器壁的装甲板上的热量计 (CM) 阵列进行测量。红外热像仪还用于检查未放置 CM 的光束轮廓，并测量由于 NB 热负载而导致的装甲板温度升高。将测得的光束轮廓与计算出的装甲板上的 NB 轮廓进行比较。测量表明离子源出口处束流不均匀，水平方向束流转向角与设计值不一样。研究发现，监测 NB 透光轮廓对于估计 NB 端口通过功率和 NB 沉积功率非常重要，特别是当中性束注入器 (NBI) 基于大型负氢离子源时。
The neutral beam (NB) shine-through profile is routinely monitored on the Large Helical Device (LHD) both to calibrate the port-through power of the NB and to evaluate the NB-deposition power to LHD plasmas. The profile is measured with a calorimeter (CM) array on an armor plate of the NB counter wall inside the LHD vacuum vessel. An infrared camera is also used to check the beam profile where CMs are not located, and measures a temperature increase of the armor plate due to the NB heat load. The measured beam profile is compared to the calculated NB profile at the armor plate. The measurement indicates that the beam is not uniform at the exit of the ion source and that the steering angle of the beam in the horizontal direction is not the same as the designed value. It is found that the monitoring of the NB shine-through profile is important to estimate the NB port-through power and the NB deposition power, especially when the neutral beam injector (NBI) is based on a large negative-hydrogen ion source.
S. Sudo、Y. Nagayama、M. Emoto、M. Goto、Y. Hamada、K. Ida、T. Ido、H. Iguchi、S. Inagaki、M. Isobe、K. Kawahata、K. KMopenkov、S.
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