Isotope mass scaling and transport comparison between JET Deuterium and Tritium L-mode plasmas

被引：14

作者：

Tala, T. ^{[1
]}

Jarvinen, A. E. ^{[1
]}

Maggi, C. F. ^{[2
]}

Mantica, P. ^{[3
]}

Mariani, A. ^{[3
]}

Salmi, A. ^{[1
]}

Carvalho, I. S. ^{[2
,6
]}

Chomiczewska, A. ^{[4
]}

Delabie, E. ^{[2
]}

Devasagayam, F. ^{[5
]}

Ferreira, J. ^{[6
]}

Gromelski, W. ^{[4
]}

Hawkes, N. ^{[2
]}

Horvath, L. ^{[2
]}

Karhunen, J. ^{[1
]}

King, D. ^{[2
]}

Kirjasuo, A. ^{[1
]}

Kowalska-Strzeciwilk, E. ^{[4
]}

Leerink, S. ^{[5
]}

Lennholm, M. ^{[2
]}

Lomanowski, B. ^{[7
]}

Maslov, M. ^{[2
]}

Menmuir, S. ^{[2
]}

Morales, R. B. ^{[2
]}

Sharma, R. ^{[2
]}

Sun, H. ^{[2
]}

Tanaka, K. ^{[8
]}

机构：

[1] VTT Espoo, VTT, POB 1000, FI-02044 Espoo, Finland

[2] UKAEA, Culham Sci Ctr, Abingdon OX14 3DB, England

[3] CNR, Inst Plasma Sci & Technol, Milan, Italy

[4] IPPLM, Warsaw, Poland

[5] Aalto Univ, Espoo, Finland

[6] Univ Lisbon, Inst Plasmas & Fusao Nucl, Lisbon, Portugal

[7] Oak Ridge Natl Lab, Oak Ridge, TN USA

[8] Natl Inst Fus Sci, Toki, Gifu, Japan

来源：

NUCLEAR FUSION | 2023年 / 63卷 / 11期

关键词：

isotope mass scaling; Deuterium and Tritium; confinement and transport; JET; dimensionless scaling; heat and particle transport; CONFINEMENT; TOKAMAKS;

D O I：

10.1088/1741-4326/acea94

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 dimensionless isotope mass scaling experiment between pure Deuterium and pure Tritium plasmas with matched rho* , nu* , beta n , q and Te/Ti has been achieved in JET L-mode with dominant electron heating (NBI+ohmic) conditions. 28% higher scaled energy confinement time Bt tau E,th/A is found in favour of the Tritium plasma. This can be cast in the form of the dimensionless energy confinement scaling law as omega i tau E,th similar to A0.48 +/- 0.16 . This significant isotope mass scaling is consequently seen in the scaled one-fluid heat diffusion coefficient A chi eff/Bt which is around 50% lower in the Tritium plasma throughout the whole plasma radius. The isotope mass dependence in the particle transport channel is negligible, supported also by the perturbative particle transport analysis with gas puff modulation. The comparison of the edge particle fuelling or ionisation profiles from the EDGE2D-EIRENE simulations show that the absolute density differences that are necessary for the dimensionless match in the confined plasma dominate over any isotope mass dependencies of particle fuelling and ionization profiles at the plasma edge. Local GENE simulation results indicate a mild anti-gyroBohm effect at rho tor = 0.6 and thereby a small isotope mass dependence in favour of Tritium on heat transport and a negligible effect on particle transport. A significant fraction of the isotope scaling and reduced heat transport observed in the Tritium plasma is not captured in the GENE and ASTRA-TGLF-SAT2 simulations by simply changing the isotope mass for the same input profiles.

引用

页数：27

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