Inter-ELM evolution of the edge current density in JET-ILW type I ELMy H-mode plasmas
Inter-ELM evolution of the edge current density in JET-ILW type I ELMy H-mode plasmas
复制标题
JET-ILW I 型 ELMy H 模式等离子体中边缘电流密度的 ELM 间演变
DOI:
10.1088/1361-6587/aac7a9
复制
发表时间:
2018
影响因子:
2.2
通讯作者:
Horvath L
中科院分区:
文献类型:
--
作者:
Horvath L
Recent studies (Maggi et al 2015 Nucl. Fusion 55 113031; Maggi et al 2017 Nucl. Fusion 57 116012) have shown that on JET with the Be/W ITER-like wall (JET-ILW) in high β discharges with high D 2 gas rates, the inter-ELM temperature pedestal growth is saturated half way through the ELM cycle, leading to plasmas with reduced confinement, and that the linear MHD stability of these pedestals is inconsistent with the peeling–ballooning paradigm (Snyder et al 2002 Phys. Plasmas 9 2037–43; Wilson et al 2002 Phys. Plasmas 9 1277–86). In this paper, the inter-ELM evolution of the edge current density is investigated in a wide range of type I ELMy H-modes on JET-ILW. It is found that in discharges at a low gas rate, the peak edge bootstrap current continuously increases until the ELM crashes, while it saturates during the ELM cycle at high gas rates. The effect of current diffusion on the build-up of the edge current inter-ELM is assessed by simulating the Ohmic current contribution with the JETTO transport code. The simulations indicate that current diffusion contributes little to the time evolution of the total edge current in the second half of the ELM cycle and the total current is dominated by the bootstrap current. Therefore, current diffusion does not explain why JET-ILW type I ELMy pedestals at a high gas rate and high β N are found to be stable to peeling–ballooning modes.
登录
查看更多内容
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
C. Bowman;D. Dickinson;L. Horvath;A. Lunniss;H. Wilson;I. Cziegler;L. Frassinetti;K. Gibson;A. Kirk;B. Lipschultz;C. Maggi;C. Roach;S. Saarelma;P. Snyder;A. Thornton;A. Wynn
通讯作者:
A. Wynn
影响因子:
1.6
作者:
R. Scannell;M. Beurskens;P. Carolan;A. Kirk;M. Walsh;T. O’Gorman;T. Osborne
通讯作者:
T. Osborne
影响因子:
1.6
作者:
Frassinetti, L.;Beurskens, M. N. A.;Walsh, M.
通讯作者:
Walsh, M.
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
C. Maggi;S. Saarelma;F. Casson;C. Challis;E. L. Luna;L. Frassinetti;C. Giroud;E. Joffrin;J. Simpson;M. Beurskens;I. Chapman;J. Hobirk;M. Leyland;P. Lomas;C. Lowry;I. Nunes;F. Rimini;A. Sips;H. Urano;J. Contributors
通讯作者:
J. Contributors
DOI:
10.1063/1.4939855
发表时间:
2016
期刊:
The Review of scientific instruments
影响因子:
--
作者:
Leyland MJ
通讯作者:
Leyland MJ