In situ calibration of neutral beam port-through power and estimation of neutral beam deposition on LHD

被引：35

作者：

Osakabe, M ^{[1
]}

Takeiri, Y ^{[1
]}

Tsumori, K ^{[1
]}

Murakami, S ^{[1
]}

Kaneko, O ^{[1
]}

Ikeda, K ^{[1
]}

Oka, Y ^{[1
]}

Asano, E ^{[1
]}

Kawamoto, T ^{[1
]}

Akiyama, R ^{[1
]}

Kawahata, K ^{[1
]}

Komori, A ^{[1
]}

Inoue, N ^{[1
]}

Yonezu, Y ^{[1
]}

Ohyabu, N ^{[1
]}

Motojima, O ^{[1
]}

机构：

[1] Natl Inst Fus Sci, Gifu 5095292, Japan

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2001年 / 72卷 / 01期

关键词：

D O I：

10.1063/1.1319867

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

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. (C) 2001 American Institute of Physics.

引用

页码：590 / 593

页数：4

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