Development of high poloidal beta, steady-state scenario with ITER-like tungsten divertor on EAST

Garofalo, Andrea M.; Gong, X. Z.; Qian, J.; Chen, J.; Li, G.; Li, K.; Li, M. H.; Zhai, X.; Bonoli, P.; Brower, D.; Cao, L.; Cui, L.; Ding, S.; Ding, W. X.; Guo, W.; Holcomb, Christopher; Huang, J.; Hyatt, Alan; Lanctot, Matthew; Lao, Lang L.; Liu, H.; Lyu, B.; McClenaghan, J.; Peysson, Y.; Ren, Q.; Shiraiwa, S.; Solomon, Wayne; Zang, Q.; Wan, B.

doi:10.1088/1741-4326/aa7186

Title: Development of high poloidal beta, steady-state scenario with ITER-like tungsten divertor on EAST

Journal Article · Wed Jun 07 00:00:00 EDT 2017 · Nuclear Fusion

DOI:https://doi.org/10.1088/1741-4326/aa7186· OSTI ID:1374823

Garofalo, Andrea M. ^[1]; Gong, X. Z. ^[2]; Qian, J. ^[2]; Chen, J. ^[2]; Li, G. ^[2]; Li, K. ^[2]; Li, M. H. ^[2]; Zhai, X. ^[2]; Bonoli, P. ^[3]; Brower, D. ^[4]; Cao, L. ^[2]; Cui, L. ^[5]; Ding, S. ^[2]; Ding, W. X. ^[4]; Guo, W. ^[2]; Holcomb, Christopher ^[6]; Huang, J. ^[2]; Hyatt, Alan ^[1]; Lanctot, Matthew ^[1]; Lao, Lang L. ^[1] more »

General Atomics, San Diego, CA (United States)
Chinese Academy of Sciences (CAS), Hefei (China). Inst. of Plasma Physics
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
Univ. of California, Los Angeles, CA (United States). Dept. of Physics and Astronomy
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Oak Ridge Associated Univ., Oak Ridge, TN (United States)
Alternative Energies and Atomic Energy Commission (CEA), Saint-Paul-Les-Durance Cedex (France). Inst. de Recherche sur la Fusion par confinement Magnetique (IRFM)

Recent experiments on EAST have achieved the first long pulse H-mode (61 s) with zero loop voltage and an ITER-like tungsten divertor, and have demonstrated access to broad plasma current profiles by increasing the density in fully-noninductive lower hybrid current-driven discharges. These long pulse discharges reach wall thermal and particle balance, exhibit stationary good confinement (H_98y2~1.1) with low core electron transport, and are only possible with optimal active cooling of the tungsten armors. In separate experiments, the electron density was systematically varied in order to study its effect on the deposition profile of the external lower hybrid current drive (LHCD), while keeping the plasma in fully-noninductive conditions and with divertor strike points on the tungsten divertor. A broadening of the current profile is found, as indicated by lower values of the internal inductance at higher density. A broad current profile is attractive because, among other reasons, it enables internal transport barriers at large minor radius, leading to improved confinement as shown in companion DIII-D experiments. These experiments strengthen the physics basis for achieving high performance, steady state discharges in future burning plasmas.

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Research Organization:: General Atomics, San Diego, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: FC02-04ER54698; SC0010685; SC0010492; FG02-01ER54615; AC02-09CH11466; AC52-07NA27344

OSTI ID:: 1374823

Alternate ID(s):: OSTI ID: 1838247

Report Number(s):: LLNL-JRNL-830403

Journal Information:: Nuclear Fusion, Vol. 57, Issue 7; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 31 works

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References (19)

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Modeling and advances in the high bootstrap fraction regime on EAST towards the steady-state operation Wu, M. Q.; Li, G. Q.; Qian, J. P. Nuclear Fusion, Vol. 59, Issue 10 https://doi.org/10.1088/1741-4326/ab2d60	journal	August 2019
Synergy of two lower hybrid waves with different frequencies on EAST Zhai, X. M.; Chen, J. L.; Xiang, N. Physics of Plasmas, Vol. 26, Issue 5 https://doi.org/10.1063/1.5095653	journal	May 2019
Study of Alfven eigenmodes stability in plasma with multiple NBI driven energetic particle species Varela, J.; Spong, D. A.; Garcia, L. Physics of Plasmas, Vol. 26, Issue 6 https://doi.org/10.1063/1.5098347	journal	June 2019
Analysis of Alfven eigenmode destabilization in DIII-D high poloidal β discharges using a Landau closure model Varela, J.; Spong, D. A.; Garcia, L. Nuclear Fusion, Vol. 58, Issue 7 https://doi.org/10.1088/1741-4326/aac33f	journal	June 2018
Theoretical analysis of key factors achieving reversed magnetic shear q -profiles sustained with lower hybrid waves on EAST Zhai, X. M.; Xiang, N.; Chen, J. L. Plasma Physics and Controlled Fusion, Vol. 61, Issue 4 https://doi.org/10.1088/1361-6587/aaffe5	journal	February 2019
Analysis of performance degradation in an electron heating dominant H-mode plasma after ECRH termination in EAST Du, Hongfei; Ding, Siye; Chen, Jiale Nuclear Fusion, Vol. 58, Issue 6 https://doi.org/10.1088/1741-4326/aabaab	journal	April 2018
Transport barriers in bootstrap-driven tokamaks Staebler, G. M.; Garofalo, A. M.; Pan, C. Physics of Plasmas, Vol. 25, Issue 5 https://doi.org/10.1063/1.5019282	journal	May 2018
Transport simulation of EAST long-pulse H-mode discharge with integrated modeling Wu, M. Q.; Li, G. Q.; Chen, J. L. Nuclear Fusion, Vol. 58, Issue 4 https://doi.org/10.1088/1741-4326/aaa990	journal	February 2018
Overview of EAST experiments on the development of high-performance steady-state scenario Wan, B. N.; Liang, Y. F.; Gong, X. Z. Nuclear Fusion, Vol. 57, Issue 10 https://doi.org/10.1088/1741-4326/aa7861	journal	July 2017
Progress of physics understanding for long pulse high-performance plasmas on EAST towards the steady-state operation of ITER and CFETR Huang, J.; Gong, X.; Garofalo, A. M. Plasma Physics and Controlled Fusion, Vol. 62, Issue 1 https://doi.org/10.1088/1361-6587/ab56a5	journal	December 2019
Integrated operation of steady-state long-pulse H-mode in Experimental Advanced Superconducting Tokamak Gong, X.; Garofalo, A. M.; Huang, J. Nuclear Fusion, Vol. 59, Issue 8 https://doi.org/10.1088/1741-4326/ab1c7b	journal	July 2019

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