Fast-ion velocity-space tomography using slowing-down regularization in EAST plasmas with co- and counter-current neutral beam injection

被引:36
作者
Madsen, B. [1 ]
Huang, J. [2 ]
Salewski, M. [1 ]
Jarleblad, H. [1 ]
Hansen, P. C. [3 ]
Stagner, L. [4 ]
Su, J. [2 ]
Chang, J. F. [2 ]
Fu, J. [2 ]
Wang, J. F. [2 ]
Liang, L. Z. [2 ]
Zhong, G. Q. [2 ]
Li, Y. Y. [2 ]
Lyu, B. [2 ]
Liu, H. Q. [2 ]
Zang, Q. [2 ]
Luo, Z. P. [2 ]
Nocente, M. [5 ,6 ]
Moseev, D. [7 ]
Fan, T. S. [8 ,9 ]
Zhang, Y. M. [8 ,9 ]
Yang, D. [8 ,9 ]
Sun, J. Q. [8 ,9 ]
Liao, L. Y. [8 ,9 ]
机构
[1] Tech Univ Denmark, Dept Phys, Lyngby, Denmark
[2] Chinese Acad Sci, Inst Plasma Phys, PO 1126, Hefei 230031, Anhui, Peoples R China
[3] Tech Univ Denmark, Dept Appl Math & Comp Sci, Lyngby, Denmark
[4] Gen Atom, San Diego, CA USA
[5] Univ Milano Bicocca, Dipartimento Fis G Occhialini, Milan, Italy
[6] CNR, Inst Plasma Sci & Technol, Milan, Italy
[7] Max Planck Inst Plasma Phys, Greifswald, Germany
[8] Peking Univ, Sch Phys, Beijing, Peoples R China
[9] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing, Peoples R China
基金
中国国家自然科学基金;
关键词
velocity-space tomography; fast-ion D-alpha spectroscopy; fast ions; slowing-down regularization; EAST tokamak; ALPHA;
D O I
10.1088/1361-6587/abb79b
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
We demonstrate 2D reconstructions of the fast-ion velocity distribution from two-view fast-ion D-alpha (FIDA) measurements at the EAST tokamak. By expressing the distribution in a basis relying on the fast-ion slowing-down process in fusion plasmas, the smoothness and velocity-space resolution of reconstructions are improved. We reconstruct distributions of fast ions born from simultaneous co- and counter-current neutral beam injection and detect the expected distinct change in fast-ion birth pitch when comparing discharges utilizing different neutral beam injectors. For purely co-current injection, we find a good agreement between TRANSP-predicted and reconstructed fast-ion densities, pressures and current densities for energies above 20 keV. We furthermore illustrate the improvement of the reconstructed high-energy range (> 40 keV) of the distribution by combining FIDA with neutron emission spectroscopy measurements with the compact single-plate EJ301 scintillator.
引用
收藏
页数:14
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