Characterisation of the scrape-off layer in JET-ILW deuterium and helium low-confinement mode plasmas

被引：0
|
作者：
Rees, D. [1 ]
Groth, M. [1 ]
Aleiferis, S. [2 ]
Brezinsek, S. [3 ]
Brix, M. [2 ]
Jepu, I. [2 ]
Lawson, K. D. [2 ]
Meigs, A. G. [2 ]
Menmuir, S. [2 ]
Kirov, K. [2 ]
Lomas, P. [2 ]
Lowry, C. [2 ]
Thomas, B. [2 ]
Widdowson, A. [2 ]
Carvalho, P. [2 ]
Delabie, E. [4 ]
机构：
[1] Aalto Univ, Dept Appl Phys, Espoo, Finland
[2] UKAEA, Culham Sci Ctr, Abingdon, England
[3] Forschungszentrum Julich GmbH, Inst Energy & Climate Res Plasma Phys, Julich, Germany
[4] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA
来源：
NUCLEAR MATERIALS AND ENERGY | 2024年 / 39卷
关键词：
Helium plasma; Detachment; JET; Tokamak; Divertor; SOL; DIVERTOR; DETACHMENT; PARTICLE;
D O I：
10.1016/j.nme.2024.101657
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
Langmuir probe measurements in neutral beam injection (NBI) heated, low-confinement mode plasmas in JET ITER-like wall showed that the current to the divertor targets, I div , in helium (He) plasmas was up to 70 % lower on the low-field side (LFS) than in otherwise identical deuterium (D) plasmas. The edge plasma density at which the rollover of Idivoccurred div occurred i.e. the onset of detachment, was 10 % higher in He plasmas on both the LFS and high-field side (HFS). The density of I div rollover increases by 25 % for He when the NBI power increases 1 MW to 5 MW. The total radiated power was similar in He and D plasmas for densities below the I div rollover. At densities above the I div rollover density, the total radiated power and power from within the separatrix are higher in He, reducing the power across the separatrix and subsequently I div,LFS . In He plasmas, the peak radiated power was observed within the confined region above the X-point in tomographic reconstructions from bolometry.
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页数：9
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