Plasma flow measurements based on charge exchange recombination spectroscopy in the Wendelstein 7-X stellarator

被引：6

作者：

Alonso, J. A. ^{[1
]}

Ford, O. P. ^{[2
]}

Vano, L. ^{[2
]}

Akaslompolo, S. ^{[3
]}

Buller, S. ^{[2
]}

McDermott, R. ^{[4
]}

Smith, H. M. ^{[2
]}

Baldzuhn, J. ^{[2
]}

Beidler, C. D. ^{[2
]}

Beurskens, M. ^{[2
]}

Bozhenkov, S. ^{[2
]}

Brunner, K. J. ^{[2
]}

Calvo, I ^{[1
]}

Carralero, D. ^{[1
]}

Dinklage, A. ^{[2
]}

Estrada, T. ^{[1
]}

Fuchert, G. ^{[2
]}

Geiger, J. ^{[2
]}

Knauer, J. ^{[2
]}

Langenberg, A. ^{[2
]}

Pablant, N. A. ^{[5
]}

Pasch, E. ^{[2
]}

Poloskei, P. Zs ^{[2
]}

Velasco, J. L. ^{[1
]}

Windisch, T. ^{[2
]}

机构：

[1] CIEMAT, Lab Nacl Fus, Madrid 28040, Spain

[2] Max Planck Inst Plasma Phys, D-17489 Greifswald, Germany

[3] Aalto Univ, Espoo 02150, Finland

[4] Max Planck Inst Plasma Phys, D-85748 Garching, Germany

[5] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA

来源：

NUCLEAR FUSION | 2022年 / 62卷 / 10期

关键词：

magnetic confinement fusion; stellarator; plasma flow; neoclassical theory; CROSS-SECTION; TRANSPORT; HYDROGEN; VELOCITY; SPECTRA;

D O I：

10.1088/1741-4326/ac7e5b

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：

The initial operation of neutral beams in Wendelstein 7-X enabled the first measurements of carbon (C6+) temperature and rotation with a multi-chord charge exchange recombination spectroscopy system. In this article we analyse the velocity measurements obtained with this system to infer the profiles of radial electric field, E (r), and net parallel velocity of fully stripped carbon ions, V (||). We include a general treatment of the flow geometry and the velocity corrections due to the energy dependence of the charge exchange cross section. The inverted profiles are compared with neoclassical calculations for various plasma conditions and two magnetic configurations. It is found that both the E (r) and V (||) experimental profiles agree in sign and order of magnitude with the neoclassical expectations and reproduce the expected dependencies on plasma parameters and magnetic configuration, within the reduced dataset presented. However, quantitative differences with respect to the neoclassical profiles are observed above the estimated errors in various conditions.

引用

页数：17

共 50 条

[1] Charge exchange recombination spectroscopy at Wendelstein 7-X
Ford, O. P.
Vano, L.
Alonso, J. A.
Baldzuhn, J.
Beurskens, M. N. A.
Biedermann, C.
Bozhenkov, S. A.
Fuchert, G.
Geiger, B.
Hartmann, D.
Jaspers, R. J. E.
Kappatou, A.
Langenberg, A.
Lazerson, S. A.
McDermott, R. M.
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Neelis, T. W. C.
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Pasch, E.
Rust, N.
Schroeder, R.
Scott, E. R.
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[4] The Wendelstein 7-X Stellarator
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[10] Boundary modelling of the stellarator Wendelstein 7-X
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JOURNAL OF NUCLEAR MATERIALS, 1997, 241 : 946 - 949

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