Stability analysis of alpha driven toroidal Alfven eigenmodes observed in JET deuterium-tritium internal transport barrier plasmas

被引：19

作者：

Fitzgerald, M. ^{[1
]}

Dumont, R. ^{[2
]}

Keeling, D. ^{[1
]}

Mailloux, J. ^{[1
]}

Sharapov, S. ^{[1
]}

Dreval, M. ^{[3
]}

Figueiredo, A. ^{[4
]}

Coelho, R. ^{[4
]}

Ferreira, J. ^{[4
]}

Rodrigues, P. ^{[4
]}

Nabais, F. ^{[4
]}

Borba, D. ^{[4
]}

Stancar, Z. ^{[1
]}

Szepesi, G. ^{[1
]}

Tinguely, R. A. ^{[5
]}

Puglia, P. G. ^{[6
]}

Oliver, H. J. C. ^{[1
]}

Kiptily, V. ^{[1
]}

Baruzzo, M. ^{[7
]}

Lennholm, M. ^{[1
]}

Siren, P. ^{[1
]}

Garcia, J. ^{[2
]}

Maggi, C. F. ^{[1
]}

机构：

[1] United Kingdom Atom Energy Author, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England

[2] CEA, IRFM, St Paul Les Durance, France

[3] Kharkov Inst Phys & Technol, Natl Sci Ctr, Akademichna 1, UA-61108 Kharkiv, Ukraine

[4] Univ Lisbon, Inst Plasmas & Fusao Nucl, Inst Super Tecn, P-1049001 Lisbon, Portugal

[5] MIT Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA

[6] Ecole Polytech Fed Lausane EPFL, Swiss Plasma Ctr SPC, CH-1015 Lausanne, Switzerland

[7] ENEA CR Frascati, Dipto Fus & Tecnol Sicurezza Nucl, Via E Fermi 45, I-00044 Rome, Italy

来源：

NUCLEAR FUSION | 2023年 / 63卷 / 11期

关键词：

JET DT; TAE; Alfven; MHD; fast particle; ITB; afterglow; CHAPTER; 5; MODES;

D O I：

10.1088/1741-4326/acee14

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：

A toroidal Alfven eigenmode (TAE) has been observed to be driven by alpha particles in a JET deuterium-tritium internal transport barrier plasma. The observation occurred 50 ms after the removal of neutral beam heating (NBI). The mode is observed on magnetics, soft-xray, interferometry and reflectometry measurements. We present detailed stability calculations using a similar tool set validated during deuterium only discharges. These calculations strongly support the conclusion that the observed mode is a TAE, and that this mode was destabilized by alpha particles. Non-ideal effects from the bulk plasma are interpreted as responsible for suppressing the majority of TAEs which were also driven by alpha particles, but the modes that match the observations are predicted to be particularly weak for these non-ideal effects. This mode located far from the core on the outboard midplane is found to be driven by both trapped and passing particles despite alpha particles originating in the core.

引用

页数：20

共 2 条

[1] Toroidal Alfven eigenmodes observed in low power JET deuterium-tritium plasmas
Oliver, H. J. C.
Sharapov, S. E.
Stancar, Z.
Fitzgerald, M.
Tholerus, E.
Breizman, B. N.
Dreval, M.
Ferreira, J.
Figueiredo, A.
Garcia, J.
Hawkes, N.
Keeling, D. L.
Puglia, P. G.
Rodrigues, P.
Tinguely, R. A.
NUCLEAR FUSION, 2023, 63 (11)
[2] Toroidal Alfven eigenmode stability in JET internal transport barrier afterglow experiments
Fitzgerald, M.
Sharapov, S. E.
Siren, P.
Tholerus, E.
Dreval, M.
Szepesi, G.
Vallejos, P.
Johnson, T.
Fil, N.
Ferreira, J.
Rodrigues, P.
Figueiredo, A.
Borba, D.
Coelho, R.
Nabais, F.
Mailloux, J.
Oliver, H. J. C.
Di Troia, C.
Napoli, F.
Stancar, Z.
Dumont, R.
Keeling, D.
NUCLEAR FUSION, 2022, 62 (10)

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