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.

引用

页数：9