Application of beam emission spectroscopy to NBI plasmas of Heliotron J.
Application of beam emission spectroscopy to NBI plasmas of Heliotron J.
复制标题
束发射光谱在 Heliotron J 的 NBI 等离子体中的应用。
DOI：
10.1063/1.3495787
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
F. Sano
中科院分区：
文献类型：
--
作者：
S. Kobayashi;S. Kado;Tetsutarou Oishi;T. Kagawa;S. Ohshima;T. Mizuuchi;K. Nagasaki;S. Yamamoto;Hiroyuki Okada;T. Minami;Sadayoshi Murakami;H. Lee;Y. Nakamura;K. Hanatani;S. Konoshima;M. Takeuchi;K. Toushi;F. Sano
本文描述了束流发射光谱(BES)在非对称螺旋磁轴结构的氦-J加速器上的应用。通过等离子体(电子/离子)与束流原子碰撞激发过程的数值计算，估算了束流发射的光谱和空间分布。给出了两组具有良好空间分辨率的视线。一种是优化的观察弦线，它有20条视线，利用新设计的观察口观测整个等离子体区域，空间分辨率Δρ小于±0.055。另一组是目前氦-J观测区的15个视线，用于初步测量，以讨论北京谱仪测量密度起伏的可行性。用带CCD相机的单色仪测量了束流发射。单色仪测得的束流发射光谱分布与模型计算得到的束流发射光谱有很好的一致性。在本实验装置中，还使用了带有干涉滤光片系统的雪崩光电二极管来评估光束发射的信噪比(S/N)。正在计划对光学系统进行修改，以提高S/N比，这将使我们能够估计氦J的密度涨落。
This paper describes the application of the beam emission spectroscopy (BES) to Heliotron J, having the nonsymmetrical helical-magnetic-axis configuration. The spectral and spatial profile of the beam emission has been estimated by the numerical calculation taking the collisional excitation processes between plasmas (electrons/ions) and beam atoms. Two sets of the sightlines with good spatial resolution are presented. One is the optimized viewing chords which have 20 sightlines and observe the whole plasma region with the spatial resolution Δρ less than ±0.055 using the newly designed viewing port. The other is 15 sightlines from the present viewing port of Heliotron J for the preliminary measurement to discuss the feasibility of the density fluctuation measurement by BES. The beam emission has been measured by a monochromator with a CCD camera. A good consistency has been obtained between the spectral profiles of the beam emission measured by the monochromator and the beam emission spectrum deduced by the model calculation. An avalanche photodiode with an interference filter system was also used to evaluate the signal-to-noise (S/N) ratio of the beam emission in the present experimental setup. The modification of the optical system is being planned to improve the S/N ratio, which will enable us to estimate the density fluctuation in Heliotron J.
影响因子：
3.3
作者：
F. Sano;T. Mizuuchi;K. Kondo;K. Nagasaki;H. Okada;S. Kobayashi;K. Hanatani;Y. Nakamura;S. Yamamoto;Y. Torii;Y. Suzuki;H. Shidara;M. Kaneko;H. Arimoto;T. Azuma;J. Arakawa;K. Ohashi;M. Kikutake;N. Shimazaki;T. Hamagami;G. Motojima;H. Yamazaki;M. Yamada;H. Kitagawa;T. Tsuji;H. Nakamura;S. Watanabe;S. Murakami;N. Nishino;M. Yokoyama;Y. Ijiri;T. Senju;K. Yaguchi;K. Sakamoto;K. Tohshi;M. Shibano
通讯作者：
F. Sano;T. Mizuuchi;K. Kondo;K. Nagasaki;H. Okada;S. Kobayashi;K. Hanatani;Y. Nakamura;S. Yamamoto;Y. Torii;Y. Suzuki;H. Shidara;M. Kaneko;H. Arimoto;T. Azuma;J. Arakawa;K. Ohashi;M. Kikutake;N. Shimazaki;T. Hamagami;G. Motojima;H. Yamazaki;M. Yamada;H. Kitagawa;T. Tsuji;H. Nakamura;S. Watanabe;S. Murakami;N. Nishino;M. Yokoyama;Y. Ijiri;T. Senju;K. Yaguchi;K. Sakamoto;K. Tohshi;M. Shibano