Explaining Cold-Pulse Dynamics in Tokamak Plasmas Using Local Turbulent Transport Models.
Pablo Rodriguez-Fernandez,Anne White,Nathan Howard,Brian Grierson,G. M. Staebler,J. E. Rice,X. Yuan,N. M. Cao,Alexander Creely,Martin Greenwald,Amanda Hubbard,Jerry Hughes,J. H. Irby,F. Sciortino +13 more
TLDR
This Letter shows that the steady-state profiles, the cold-pulse rise time, and disappearance at higher density as measured in these experiments are successfully captured by a recent local quasilinear turbulent transport model, demonstrating that the existence of nonlocal transport phenomena is not necessary for explaining the behavior and time scales of cold-Pulse experiments in tokamak plasmas.Abstract:
A long-standing enigma in plasma transport has been resolved by modeling of cold-pulse experiments conducted on the Alcator C-Mod tokamak. Controlled edge cooling of fusion plasmas triggers core electron heating on time scales faster than an energy confinement time, which has long been interpreted as strong evidence of nonlocal transport. This Letter shows that the steady-state profiles, the cold-pulse rise time, and disappearance at higher density as measured in these experiments are successfully captured by a recent local quasilinear turbulent transport model, demonstrating that the existence of nonlocal transport phenomena is not necessary for explaining the behavior and time scales of cold-pulse experiments in tokamak plasmas.read more
Citations
More filters
Journal Article
A Theory-Based Transport Model With Comprehensive Physics
TL;DR: In this paper, a new theory-based transport model with comprehensive physics (trapping, general toroidal geometry, fully electromagnetic, electron-ion collisions, impurity ions) has been developed.
Towards an emerging understanding of non-locality phenomena and non-local transport
Katsumi Ida,Zhongbing Shi,H. J. Sun,Shigeru Inagaki,Kensaku Kamiya,John Rice,Naoki Tamura,Patrick Diamond,Guilhem Dif-Pradalier,X.L. Zou,Kimitaka Itoh,Satoru Sugita,Özgür D. Gürcan,T. Estrada,C. Hidalgo,T.S. Hahm,A. R. Field,Xuantong Ding,Yoshiteru Sakamoto,S. Oldenbürger,Mikio Yoshinuma,T. Kobayashi,Min Jiang,Sang-hee Hahn,You-Moon Jeon,Suk-Ho Hong,Yusuke Kosuga,Jiaqi Dong,S.-I. Itoh +28 more
TL;DR: In this article, the non-locality in the heat and momentum transport observed in the plasma, the departures from linear flux-gradient proportionality, and externally triggered non-local transport phenomena are described in both L-mode and improved-mode plasmas.
Journal ArticleDOI
Predictions of core plasma performance for the SPARC tokamak
Pablo Rodriguez-Fernandez,Nathan Howard,Martin Greenwald,Alexander Creely,J. W. Hughes,John Wright,Christopher Holland,Yuxuan Lin,F. Sciortino +8 more
TL;DR: In this article, the authors present a detailed analysis of expected turbulence regimes with linear and nonlinear CGYRO simulations, demonstrating that profile predictions with the TGLF reduced model are in reasonable agreement.
Journal ArticleDOI
Effect of the isotope mass on the turbulent transport at the edge of L-mode plasmas in ASDEX Upgrade and JET-ILW
Nicola Bonanomi,C. Angioni,P. C. Crandall,P. C. Crandall,A. Di Siena,C. F. Maggi,P. A. Schneider +6 more
TL;DR: Meyer et al. as mentioned in this paper presented an overview and summary report from the 27th Fusion Energy Conference (Ahmedabad, India, 22-27 October 2018) on the JET preparation for Deuterium-Tritium Operation.
Journal ArticleDOI
Main-ion intrinsic toroidal rotation across the ITG/TEM boundary in DIII-D discharges during ohmic and electron cyclotron heating
Brian Grierson,Colin Chrystal,Shaun Haskey,W. X. Wang,T. L. Rhodes,George McKee,Kshitish Barada,X. Yuan,M. F. F. Nave,Arash Ashourvan,Christopher Holland +10 more
TL;DR: In this paper, the deuterium main-ion toroidal rotation was measured in the linear ohmic to saturated ohmic confinement (LOC-SOC) regime and with additional electron cyclotron heating (ECH) was compared with the more commonly measured carbon ion rotation in DIII-D.
References
More filters
Journal ArticleDOI
Foundations of nonlinear gyrokinetic theory
Alain J. Brizard,T.S. Hahm +1 more
TL;DR: The nonlinear gyrokinetic equations play a fundamental role in our understanding of the long-time behavior of strongly magnetized plasmas as mentioned in this paper, and they have been used to describe the turbulent evolution of low-frequency electromagnetic fluctuations in a nonuniform magnetization with arbitrary magnetic geometry.
Journal ArticleDOI
Chapter 2: Plasma confinement and transport
E. J. Doyle,Wayne A Houlberg,Yutaka Kamada,V. S. Mukhovatov,T.H. Osborne,A. R. Polevoi,G. Bateman,J. W. Connor,J. G. Cordey,T. Fujita,Xavier Garbet,T. S. Hahm,L. D. Horton,A. E. Hubbard,F. Imbeaux,Frank Jenko,J. E. Kinsey,Yasuaki Kishimoto,J.X. Li,T. C. Luce,Y. R. Martin,M. Ossipenko,V.V. Parail,A. G. Peeters,T. L. Rhodes,J. E. Rice,C. M. Roach,V. A. Rozhansky,F. Ryter,G. Saibene,R. Sartori,A. C. C. Sips,J. A. Snipes,M. Sugihara,E. J. Synakowski,H. Takenaga,Tomonori Takizuka,K. Thomsen,M. R. Wade,H. R. Wilson,Itpa Confinement Database,Itpa Pedestal +41 more
TL;DR: The understanding and predictive capability of transport physics and plasma confinement is reviewed from the perspective of achieving reactor-scale burning plasmas in the ITER tokamak, for both core and edge plasma regions.
Journal ArticleDOI
A gyro-Landau-fluid transport model
R. E. Waltz,G. M. Staebler,William Dorland,William Dorland,Gregory W. Hammett,Gregory W. Hammett,Mike Kotschenreuther,J. A. Konings +7 more
TL;DR: In this paper, a physically comprehensive and theoretically based transport model tuned to three-dimensional (3-D) ballooning mode gyrokinetic instabilities and gyrofluid nonlinear turbulence simulations is formulated with global and local magnetic shear stabilization and E×B rotational shear stabilisation.
Journal ArticleDOI
Gyrokinetic simulations of turbulent transport
TL;DR: An overview of the gyrokinetic framework and simulations to compute turbulent transport in fusion plasmas can be found in this article, where the main results which have been brought by simulations with regard to transport of fusion devices and fluctuation measurements are discussed.
Journal ArticleDOI
A theory-based transport model with comprehensive physicsa)
TL;DR: In this article, a new theory-based transport model with comprehensive physics (trapping, general toroidal geometry, fully electromagnetic, electron-ion collisions, impurity ions) has been developed.