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Overview of recent experimental results on the EAST Tokamak

Journal Article · · Nuclear Fusion
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  1. Chinese Academy of Sciences (CAS), Hefei (China). Institue of Plasma Physics (IPP); EAST Team. et al.
+ Show Author Affiliations
Since the last IAEA-FEC in 2021, significant progress on the development of long pulse steady state scenario and its related key physics and technologies have been achieved, including the reproducible 403 s long-pulse steady-state H-mode plasma with pure radio frequency (RF) power heating. A thousand-second time scale (~1056 s) fully non-inductive plasma with high injected energy up to 1.73 GJ has also been achieved. The EAST operational regime of high βP has been significantly extended (H98y2 > 1.3, βP ~ 4.0, βN ~ 2.4 and ne/nGW ~ 1.0) using RF and neutral beam injection (NBI). The full edge localized mode suppression using the n = 4 resonant magnetic perturbations has been achieved in ITER-like standard type-I ELMy H-mode plasmas with q95 ≈ 3.1 on EAST, extrapolating favorably to the ITER baseline scenario. The sustained large ELM control and stable partial detachment have been achieved with Ne seeding. The underlying physics of plasma-beta effect for error field penetration, where toroidal effect dominates, is disclosed by comparing the results in cylindrical theory and MARS-Q simulation in EAST. Breakdown and plasma initiation at low toroidal electric fields (<0.3 V m-1) with EC pre-ionization is developed. A beneficial role on the lower hybrid wave injection to control the tungsten concentration in the NBI discharge is observed for the first time in EAST suggesting a potential way toward steady-state H-mode NBI operation.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
Sponsoring Organization:
National Natural Science Foundation of China (NSFC); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Fusion Energy Sciences (FES)
Contributing Organization:
EAST Team
Grant/Contract Number:
AC52-07NA27344; SC0010685
OSTI ID:
2441288
Alternate ID(s):
OSTI ID: 2512445
Report Number(s):
LLNL-JRNL-2002544; 2022YFE03050000; 2019YFE03040000; 12375229; 12375230; 12305254
Journal Information:
Nuclear Fusion, Journal Name: Nuclear Fusion Journal Issue: 11 Vol. 64; ISSN 0029-5515
Publisher:
IOP ScienceCopyright Statement
Country of Publication:
United States
Language:
English

References (37)

The CHEASE code for toroidal MHD equilibria journal September 1996
Development of Langmuir probe array for the new lower tungsten divertor in EAST journal February 2022
A gyrokinetic continuum code based on the numerical Lie transform (NLT) method journal July 2016
Real time wall conditioning with lithium powder injection in long pulse H-mode plasmas in EAST with tungsten divertor journal May 2019
Experiences and lessons from the mitigation of leading edge induced melting on actively cooled ITER-like W/Cu monoblocks for divertor target in EAST journal December 2023
Full toroidal plasma response to externally applied nonaxisymmetric magnetic fields journal December 2010
Toroidal modeling of penetration of the resonant magnetic perturbation field journal April 2013
Development of a time-of-flight low-energy neutral particle analyzer for EAST tokamak journal October 2018
Performance improvement of space-resolved extreme ultraviolet spectrometer by use of complementary metal-oxide semiconductor detectors at the Experimental Advanced Superconducting Tokamak journal December 2022
Threshold density for toroidal rotation reversal bifurcation induced by symmetry breaking journal May 2023
Tungsten transport due to the neoclassical toroidal viscosity induced by resonant magnetic perturbation in the EAST tokamak journal December 2023
Chapter 8: Plasma operation and control journal December 1999
Chapter 6: Steady state operation journal June 2007
I-mode: an H-mode energy confinement regime with L-mode particle transport in Alcator C-Mod journal August 2010
Plasma current, position and shape feedback control on EAST journal March 2013
Plasma vertical stabilisation in ITER journal June 2015
Progress of physics understanding for long pulse high-performance plasmas on EAST towards the steady-state operation of ITER and CFETR journal December 2019
ITER-like vertical stabilization system for the east Tokamak journal July 2017
Multi-machine analysis of termination scenarios with comparison to simulations of controlled shutdown of ITER discharges journal December 2017
Assessment of the baseline scenario at q 95 ~ 3 for ITER journal September 2018
Recent advances in EAST physics experiments in support of steady-state operation for ITER and CFETR journal June 2019
GPU-optimized fast plasma equilibrium reconstruction in fine grids for real-time control and data analysis journal June 2020
Overview of the ICRF antenna coupling experiments on EAST journal February 2021
Comparison of divertor behavior and plasma confinement between argon and neon seeding in EAST journal April 2021
Overview of the SPARC physics basis towards the exploration of burning-plasma regimes in high-field, compact tokamaks journal March 2022
First demonstration of full ELM suppression in low input torque plasmas to support ITER research plan using n = 4 RMP in EAST journal October 2021
Symmetry breaking driving spontaneous plasma rotation in tokamak fusion devices journal September 2021
Integrated ELM and divertor power flux control using RMPs with low input torque in EAST in support of the ITER research plan journal September 2021
Advances in the long-pulse steady-state high beta H-mode scenario with active controls of divertor heat and particle fluxes in EAST journal February 2022
Understanding core heavy impurity transport in a hybrid discharge on EAST journal April 2022
Understanding core tungsten (W) transport and control in an improved high-performance fully non-inductive discharge on EAST journal April 2022
Achievements of Actively Controlled Divertor Detachment Compatible with Sustained High Confinement Core in DIII-D and EAST journal December 2021
First experimental results with new ICRF antenna in EAST journal June 2022
Progress on physics understanding of improved confinement with fishbone instability at low q 95 < 3.5 operation regime in EAST journal November 2022
Modeling of aluminum erosion by neutral particles in dedicated EAST experiments using the 3D-GAPS code journal April 2023
Extension of ELM suppression window using n=4 RMPs in EAST journal August 2023
Realization of thousand-second improved confinement plasma with Super I-mode in Tokamak EAST journal January 2023

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