scholarly journals Progress of physics understanding for long pulse high-performance plasmas on EAST towards the steady-state operation of ITER and CFETR

2019 ◽  
Vol 62 (1) ◽  
pp. 014019
Author(s):  
J Huang ◽  
X Gong ◽  
A M Garofalo ◽  
J Qian ◽  
J Chen ◽  
...  
Keyword(s):  
Steady State ◽  
High Performance ◽  
Steady State Operation ◽  
Long Pulse

scholarly journals Recent progress of the development of a long pulse 140GHz ECRH system on EAST

2019 ◽  
Vol 203 ◽  
pp. 04002
Author(s):  
Handong Xu ◽  
Xiaojie Wang ◽  
Jian Zhang ◽  
Fukun Liu ◽  
Yiyun Huang ◽  
...  
Keyword(s):  
Steady State ◽  
Recent Progress ◽  
Short Pulse ◽  
Mode Operation ◽  
Steady State Operation ◽  
Dummy Load ◽  
Long Pulse

A long pulse ECRH system with a goal of 140GHz 4MW 100~1000s has been developed to meet the requirement of steady-state operation on EAST. Gycom gyrotrons are employed in the No.1 and No.3 systems, CPI gyrotrons are used in the No.2 and No.4 systems. The development of the two Gycom gyrotron systems has been finished. The first short pulse EC wave injection has been demonstrated successfully during the EAST 2015 Spring campaign. In the commissioning and operation towards steady-state operation, 0.4MW 100s has been injected to plasma successfully by using the No.1 system, 4.7keV 102s L-mode and 102s H-mode plasma have been achieved on EAST with the help of ECRH. Recently, a longest pulse of 0.55MW 1000s has been obtained based on calorimetric dummy load measurements on the No.3 gyrotron. The No.2 gyrotron also has been installed and partially tested, 500kW 80s has been demonstrated in the dummy load. The remaining No.4 gyrotron will be ready to test in 2018 or 2019. The whole 4MW system will be completed within two years. The 400s fully non-inductive H-mode operation would be expected in the next four years in the condition of fully tungsten diverter on EAST.

Study of plasma wall interactions in the long-pulse NB-heated discharges of JT-60U towards steady-state operation

2005 ◽  
Vol 337-339 ◽  
pp. 802-807 ◽  
Author(s):  
H. Takenaga ◽  
N. Asakura ◽  
S. Higashijima ◽  
T. Nakano ◽  
H. Kubo ◽  
...  
Keyword(s):  
Steady State ◽  
Steady State Operation ◽  
Long Pulse ◽  
Wall Interactions

The Experimental Consideration for TBM Mock-Up Effect on Plasma Performance Based on MAPES Platform in EAST

2013 ◽  
Author(s):  
Songlin Liu ◽  
Fang Ding ◽  
Xiangcun Chen ◽  
Yong Pu ◽  
Jia Li ◽  
...  
Keyword(s):  
Steady State ◽  
Plasma Physics ◽  
Evaluation System ◽  
High Performance ◽  
Martensitic Steels ◽  
Steady State Operation ◽  
Magnetic Analysis ◽  
Rafm Steel ◽  
The Impact

EAST can provide better opportunities to contribute development of ITER-relevant plasma physics and engineering because it has ITER-like configuration, and has achieved 10s H-mode plasma, and aims steady-state operation of DD high performance plasma. The impact of Test blanket module (TBM) using RAFM (reduced activation ferritic/martensitic) steels on tokomak plasma is a major concern in ITER operations. In order to assess this effect due to TBM local ripple, an experiment plan of TBM mockup using RAFM steel is being planned on MAPES (Material and Plasma Evaluation System) in EAST. This paper reports experimental consideration on MAPES based on magnetic analysis and ripple calculation at separatrix point. The relevant experiments strategy and plan in EAST are also proposed.

Advanced Control Scenario of High-Performance Steady-State Operation for JT-60 Superconducting Tokamak

2004 ◽  
Vol 6 (3) ◽  
pp. 2281-2285
Author(s):  
H Tamai ◽  
G Kurita ◽  
M Matsukawa ◽  
K Urata ◽  
S Sakurai ◽  
...  
Keyword(s):  
Steady State ◽  
High Performance ◽  
Steady State Operation ◽  
Advanced Control ◽  
Superconducting Tokamak

scholarly journals Progress towards high-performance steady-state operation on DIII-D

2006 ◽  
Vol 81 (23-24) ◽  
pp. 2807-2815 ◽  
Author(s):  
C.M. Greenfield ◽  
M. Murakami ◽  
A.M. Garofalo ◽  
E.J. Doyle ◽  
J.R. Ferron ◽  
...  
Keyword(s):  
Steady State ◽  
High Performance ◽  
Steady State Operation

Simulations of KSTAR high performance steady state operation scenarios

2009 ◽  
Vol 49 (11) ◽  
pp. 115018 ◽  
Author(s):  
Yong-Su Na ◽  
C.E. Kessel ◽  
J.M. Park ◽  
Sumin Yi ◽  
A. Becoulet ◽  
...  
Keyword(s):  
Steady State ◽  
High Performance ◽  
Steady State Operation

scholarly journals Integration of full divertor detachment with improved core confinement for tokamak fusion plasmas

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
L. Wang ◽  
H. Q. Wang ◽  
S. Ding ◽  
A. M. Garofalo ◽  
X. Z. Gong ◽  
...  
Keyword(s):  
Steady State ◽  
High Performance ◽  
Confinement Loss ◽  
Fusion Plasmas ◽  
Large Radius ◽  
Transport Barrier ◽  
Self Organized ◽  
Steady State Operation ◽  
Core Plasma ◽  
Promising Solution

AbstractDivertor detachment offers a promising solution to the challenge of plasma-wall interactions for steady-state operation of fusion reactors. Here, we demonstrate the excellent compatibility of actively controlled full divertor detachment with a high-performance (βN ~ 3, H98 ~ 1.5) core plasma, using high-βp (poloidal beta, βp > 2) scenario characterized by a sustained core internal transport barrier (ITB) and a modest edge transport barrier (ETB) in DIII-D tokamak. The high-βp high-confinement scenario facilitates divertor detachment which, in turn, promotes the development of an even stronger ITB at large radius with a weaker ETB. This self-organized synergy between ITB and ETB, leads to a net gain in energy confinement, in contrast to the net confinement loss caused by divertor detachment in standard H-modes. These results show the potential of integrating excellent core plasma performance with an efficient divertor solution, an essential step towards steady-state operation of reactor-grade plasmas.

Experimental studies towards long pulse steady state operation in LHD

2001 ◽  
Vol 41 (6) ◽  
pp. 779-790 ◽  
Author(s):  
N Noda ◽  
Y Nakamura ◽  
Y Takeiri ◽  
T Mutoh ◽  
R Kumazawa ◽  
...  
Keyword(s):  
Steady State ◽  
Experimental Studies ◽  
Steady State Operation ◽  
Long Pulse
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