Enhancement of edge turbulence concomitant with ELM suppression during boron powder injection in EAST

Sun, Z.; Maingi, R.; Diallo, A.; Xu, W.; Qian, Y. Z.; Tritz, K.; Ye, Y.; Li, C. L.; Xu, Z.; Wang, Y. F.; Ye, K. X.; Bortolon, A.; Nagy, A.; Zhang, L.; Duan, Y. M.; Lu, Z. Y.; Wang, H. Q.; Shi, T. H.; Zhao, H. L.; Gao, W.; Xu, J. C.; Chen, R.; Huang, M.; Zuo, G. Z.; Xu, G. S.; Gong, X. Z.; Hu, J. S.

doi:10.1063/5.0058809

Enhancement of edge turbulence concomitant with ELM suppression during boron powder injection in EAST

Journal Article · Wed Aug 25 00:00:00 EDT 2021 · Physics of Plasmas

DOI:https://doi.org/10.1063/5.0058809· OSTI ID:1818374

^[1]; ^[1]; ^[1]; Xu, W. ^[2]; Qian, Y. Z. ^[3]; Tritz, K. ^[4]; Ye, Y. ^[2]; Li, C. L. ^[5]; ^[5]; Wang, Y. F. ^[5]; Ye, K. X. ^[5]; ^[1]; Nagy, A. ^[1]; ^[5]; Duan, Y. M. ^[5]; ^[5]; ^[6]; Shi, T. H. ^[5]; ^[5]; Gao, W. ^[5] more »

Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Hefei Comprehensive National Science Center (China)
Nanchang Univ. (China)
Johns Hopkins Univ., Baltimore, MD (United States)
Chinese Academy of Sciences, Anhui (China)
General Atomics, San Diego, CA (United States)
Anhui Univ. of Science and Technology, Huainan (China)
Chinese Academy of Sciences, Anhui (China); Key Lab. of Photovoltaic and Energy Conservation Materials, Hefei (China)

A reproducible, quasi-stationary edge localized mode (ELM)-suppressed scenario was obtained over a wide range of plasma parameters by continuous injection of boron (B) powder into an upper-single null discharge in the experimental advanced superconducting tokamak [Sun et al., Nucl. Fusion 61, 014002 (2021)]. This powder-induced ELM-absent regime is associated with an edge harmonic mode (EHM) that provides continuous particle exhaust to maintain constant density without confinement degradation and impurity accumulation, the latter of which is often observed in ELM-free regimes. A flow rate threshold of B powder injection, leading to a threshold intensity of the EHM, is necessary for full ELM suppression. The fundamental harmonic of the EHM exhibits a toroidal mode number n = 1. The mode is observable in the entire poloidal cross section with a peak near the upper X-point in an upper-single null configuration. Here, the EHM spans radially across the pedestal and scrape-off layer, peaking inside the separatrix. The EHM appears to be insensitive to q₉₅, heating power, plasma toroidal rotation, and pedestal collisionality.

View Accepted Manuscript (DOE)

Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: SC0016553; FC02-04ER54698; AC02-09CH11466

OSTI ID:: 1818374

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 8 Vol. 28; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

References (51)

ELM Suppression by Boron Powder Injection and Comparison with Lithium Powder Injection on EAST Maingi, R.; Hu, J. S.; Sun, Z. Journal of Fusion Energy https://doi.org/10.1007/s10894-020-00256-3	journal	October 2020
Influence of lithium coatings with large-area coverage on EAST plasma performance Sun, Z.; Hu, J. S.; Zuo, G. Z. Fusion Engineering and Design, Vol. 89, Issue 12 https://doi.org/10.1016/j.fusengdes.2014.06.016	journal	December 2014
Tomographic reconstruction of emissive profile in the divertor region for the visible light imaging diagnostic on Experimental Advanced Superconducting Tokamak Lu, Zhiyuan; Mao, Shifeng; Yang, Jianhua Fusion Engineering and Design, Vol. 163 https://doi.org/10.1016/j.fusengdes.2020.112149	journal	February 2021
Effects of ELMs on ITER divertor armour materials Zhitlukhin, A.; Klimov, N.; Landman, I. Journal of Nuclear Materials, Vol. 363-365 https://doi.org/10.1016/j.jnucmat.2007.01.027	journal	June 2007
Transition to ELM-free improved H-mode by lithium deposition on NSTX graphite divertor surfaces Mansfield, D. K.; Kugel, H. W.; Maingi, R. Journal of Nuclear Materials, Vol. 390-391 https://doi.org/10.1016/j.jnucmat.2009.01.203	journal	June 2009
Real-time wall conditioning by controlled injection of boron and boron nitride powder in full tungsten wall ASDEX Upgrade Bortolon, A.; Rohde, V.; Maingi, R. Nuclear Materials and Energy, Vol. 19 https://doi.org/10.1016/j.nme.2019.03.022	journal	May 2019
Integration of full divertor detachment with improved core confinement for tokamak fusion plasmas Wang, L.; Wang, H. Q.; Ding, S. Nature Communications, Vol. 12, Issue 1 https://doi.org/10.1038/s41467-021-21645-y	journal	March 2021
Quiescent double barrier high-confinement mode plasmas in the DIII-D tokamak Burrell, K. H.; Austin, M. E.; Brennan, D. P. Physics of Plasmas, Vol. 8, Issue 5 https://doi.org/10.1063/1.1355981	journal	May 2001
Advances in understanding quiescent H-mode plasmas in DIII-D Burrell, K. H.; West, W. P.; Doyle, E. J. Physics of Plasmas, Vol. 12, Issue 5 https://doi.org/10.1063/1.1894745	journal	May 2005
The resistive bolometer for radiated power measurement on EAST Duan, Y. M.; Hu, L. Q.; Mao, S. T. Review of Scientific Instruments, Vol. 83, Issue 9 https://doi.org/10.1063/1.4748859	journal	September 2012
Initial measurements of plasma current and electron density profiles using a polarimeter/interferometer (POINT) for long pulse operation in EAST (invited) Liu, H. Q.; Qian, J. P.; Jie, Y. X. Review of Scientific Instruments, Vol. 87, Issue 11 https://doi.org/10.1063/1.4963378	journal	October 2016
A multi-species powder dropper for magnetic fusion applications Nagy, A.; Bortolon, A.; Mauzey, D. M. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5039345	journal	October 2018
Enhanced particle flux due to localized divertor MHD instability in DIII-D tokamak Wang, H. Q.; Watkins, J. G.; Guo, H. Y. Physics of Plasmas, Vol. 27, Issue 2 https://doi.org/10.1063/1.5140354	journal	February 2020
Chapter 2: Plasma confinement and transport Transport, ITER Physics Expert Group on Confin; Database, ITER Physics Expert Group on Confin; Editors, ITER Physics Basis Nuclear Fusion, Vol. 39, Issue 12 https://doi.org/10.1088/0029-5515/39/12/302	journal	December 1999
Deuterium retention in liquid lithium Baldwin, M. J.; Doerner, R. P.; Luckhardt, S. C. Nuclear Fusion, Vol. 42, Issue 11 https://doi.org/10.1088/0029-5515/42/11/305	journal	October 2002
ELM frequency control by continuous small pellet injection in ASDEX Upgrade Lang, P. T.; Neuhauser, J.; Horton, L. D. Nuclear Fusion, Vol. 43, Issue 10 https://doi.org/10.1088/0029-5515/43/10/012	journal	September 2003
Chapter 4: Power and particle control Loarte, A.; Lipschultz, B.; Kukushkin, A. S. Nuclear Fusion, Vol. 47, Issue 6 https://doi.org/10.1088/0029-5515/47/6/S04	journal	June 2007
I-mode: an H-mode energy confinement regime with L-mode particle transport in Alcator C-Mod Whyte, D. G.; Hubbard, A. E.; Hughes, J. W. Nuclear Fusion, Vol. 50, Issue 10 https://doi.org/10.1088/0029-5515/50/10/105005	journal	August 2010
First observation of ELM pacing with vertical jogs in a spherical torus Gerhardt, S. P.; Ahn, J-W.; Canik, J. M. Nuclear Fusion, Vol. 50, Issue 6 https://doi.org/10.1088/0029-5515/50/6/064015	journal	May 2010
ELM mitigation by supersonic molecular beam injection into the H-mode pedestal in the HL-2A tokamak Xiao, W. W.; Diamond, P. H.; Zou, X. L. Nuclear Fusion, Vol. 52, Issue 11 https://doi.org/10.1088/0029-5515/52/11/114027	journal	October 2012
ELM control strategies and tools: status and potential for ITER Lang, P. T.; Loarte, A.; Saibene, G. Nuclear Fusion, Vol. 53, Issue 4 https://doi.org/10.1088/0029-5515/53/4/043004	journal	March 2013
Enhanced confinement scenarios without large edge localized modes in tokamaks: control, performance, and extrapolability issues for ITER Maingi, R. Nuclear Fusion, Vol. 54, Issue 11 https://doi.org/10.1088/0029-5515/54/11/114016	journal	November 2014
Divertor studies in nitrogen induced completely detached H-modes in full tungsten ASDEX Upgrade Reimold, F.; Wischmeier, M.; Bernert, M. Nuclear Fusion, Vol. 55, Issue 3 https://doi.org/10.1088/0029-5515/55/3/033004	journal	February 2015
Enhanced H-mode pedestals with lithium injection in DIII-D Osborne, T. H.; Jackson, G. L.; Yan, Z. Nuclear Fusion, Vol. 55, Issue 6 https://doi.org/10.1088/0029-5515/55/6/063018	journal	May 2015
High frequency pacing of edge localized modes by injection of lithium granules in DIII-D H-mode discharges Bortolon, A.; Maingi, R.; Mansfield, D. K. Nuclear Fusion, Vol. 56, Issue 5 https://doi.org/10.1088/0029-5515/56/5/056008	journal	April 2016
Impact of impurity seeding and divertor conditions on transitions, pedestal structure and ELMs Dunne, M. G. Nuclear Fusion, Vol. 57, Issue 2 https://doi.org/10.1088/0029-5515/57/2/025002	journal	October 2016
Edge localized modes (ELMs) Zohm, H. Plasma Physics and Controlled Fusion, Vol. 38, Issue 2 https://doi.org/10.1088/0741-3335/38/2/001	journal	February 1996
Studies of EDA H-mode in Alcator C-Mod Greenwald, M.; Boivin, R.; Bonoli, P. Plasma Physics and Controlled Fusion, Vol. 42, Issue 5A https://doi.org/10.1088/0741-3335/42/5A/331	journal	May 2000
Overview of the present progress and activities on the CFETR Wan, Yuanxi; Li, Jiangang; Liu, Yong Nuclear Fusion, Vol. 57, Issue 10 https://doi.org/10.1088/1741-4326/aa686a	journal	June 2017
A stationary long-pulse ELM-absent H-mode regime in EAST Ye, Y.; Xu, G. S.; Wan, B. N. Nuclear Fusion, Vol. 57, Issue 8 https://doi.org/10.1088/1741-4326/aa7809	journal	July 2017
Investigation of impurity confinement in lower hybrid wave heated plasma on EAST tokamak Xu, Z.; Wu, Z. W.; Zhang, L. Nuclear Fusion, Vol. 58, Issue 1 https://doi.org/10.1088/1741-4326/aa8e06	journal	November 2017
ELM elimination with Li powder injection in EAST discharges using the tungsten upper divertor Maingi, R.; Hu, J. S.; Sun, Z. Nuclear Fusion, Vol. 58, Issue 2 https://doi.org/10.1088/1741-4326/aa9e3f	journal	January 2018
Injected mass deposition thresholds for lithium granule instigated triggering of edge localized modes on EAST Lunsford, R.; Sun, Z.; Maingi, R. Nuclear Fusion, Vol. 58, Issue 3 https://doi.org/10.1088/1741-4326/aaa2ac	journal	January 2018
Control of edge localized modes by pedestal deposited impurity in the HL-2A tokamak Zhang, Y. P.; Mazon, D.; Zou, X. L. Nuclear Fusion, Vol. 58, Issue 4 https://doi.org/10.1088/1741-4326/aaae81	journal	February 2018
Access and sustainment of naturally ELM-free and small-ELM regimes Viezzer, E. Nuclear Fusion, Vol. 58, Issue 11 https://doi.org/10.1088/1741-4326/aac222	journal	September 2018
Recent advances in EAST physics experiments in support of steady-state operation for ITER and CFETR Wan, B. N.; Liang, Y.; Gong, X. Z. Nuclear Fusion, Vol. 59, Issue 11 https://doi.org/10.1088/1741-4326/ab0396	journal	June 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
Characterisation of highly radiating neon seeded plasmas in JET-ILW Glöggler, S.; Wischmeier, M.; Fable, E. Nuclear Fusion, Vol. 59, Issue 12 https://doi.org/10.1088/1741-4326/ab3f7a	journal	October 2019
Active conditioning of ASDEX Upgrade tungsten plasma-facing components and discharge enhancement through boron and boron nitride particulate injection Lunsford, R.; Rohde, V.; Bortolon, A. Nuclear Fusion, Vol. 59, Issue 12 https://doi.org/10.1088/1741-4326/ab4095	journal	October 2019
Stationary high-performance grassy ELM regime in EAST Yang, Q. Q.; Xu, G. S.; Yan, N. Nuclear Fusion, Vol. 60, Issue 7 https://doi.org/10.1088/1741-4326/ab8e0f	journal	June 2020
Suppression of edge localized modes with real-time boron injection using the tungsten divertor in EAST Sun, Z.; Diallo, A.; Maingi, R. Nuclear Fusion, Vol. 61, Issue 1 https://doi.org/10.1088/1741-4326/abc763	journal	December 2020
X-point radiation, its control and an ELM suppressed radiating regime at the ASDEX Upgrade tokamak Bernert, M.; Janky, F.; Sieglin, B. Nuclear Fusion, Vol. 61, Issue 2 https://doi.org/10.1088/1741-4326/abc936	journal	December 2020
Impurity mode induced turbulent particle transport and its temperature screening effect Han, M. K.; Zhong, W. L.; Dong, J. Q. Nuclear Fusion, Vol. 61, Issue 4 https://doi.org/10.1088/1741-4326/abcdb8	journal	March 2021
Type-I ELM mitigation by continuous lithium granule gravitational injection into the upper tungsten divertor in EAST Sun, Z.; Qian, Y. Z.; Maingi, R. Nuclear Fusion, Vol. 61, Issue 6 https://doi.org/10.1088/1741-4326/abf855	journal	May 2021
Line identification of extreme ultraviolet (EUV) spectra from low-Z impurity ions in EAST tokamak plasmas Li, Lei; Zhang, Ling; Xu, Zong Plasma Science and Technology, Vol. 23, Issue 7 https://doi.org/10.1088/2058-6272/abfea2	journal	May 2021
Quiescent H-Mode Plasmas with Strong Edge Rotation in the Cocurrent Direction Burrell, K. H.; Osborne, T. H.; Snyder, P. B. Physical Review Letters, Vol. 102, Issue 15 https://doi.org/10.1103/PhysRevLett.102.155003	journal	April 2009
Edge-Localized-Mode Suppression through Density-Profile Modification with Lithium-Wall Coatings in the National Spherical Torus Experiment Maingi, R.; Osborne, T. H.; LeBlanc, B. P. Physical Review Letters, Vol. 103, Issue 7 https://doi.org/10.1103/PhysRevLett.103.075001	journal	August 2009
New Steady-State Quiescent High-Confinement Plasma in an Experimental Advanced Superconducting Tokamak Hu, J. S.; Sun, Z.; Guo, H. Y. Physical Review Letters, Vol. 114, Issue 5 https://doi.org/10.1103/PhysRevLett.114.055001	journal	February 2015
Regime of Improved Confinement and High Beta in Neutral-Beam-Heated Divertor Discharges of the ASDEX Tokamak Wagner, F.; Becker, G.; Behringer, K. Physical Review Letters, Vol. 49, Issue 19 https://doi.org/10.1103/PhysRevLett.49.1408	journal	November 1982
Suppression of Large Edge-Localized Modes in High-Confinement DIII-D Plasmas with a Stochastic Magnetic Boundary Evans, T. E.; Moyer, R. A.; Thomas, P. R. Physical Review Letters, Vol. 92, Issue 23 https://doi.org/10.1103/PhysRevLett.92.235003	journal	June 2004
Upgrade Design of Lower Divertor Langmuir Probe Diagnostic System in the EAST Tokamak Xu, J. C.; Wang, L.; Xu, G. S. IEEE Transactions on Plasma Science, Vol. 46, Issue 5 https://doi.org/10.1109/TPS.2018.2794533	journal	May 2018

Cited By (1)

Enhancement of edge turbulence concomitant with ELM suppression during boron powder injection in EAST Sun, Zhen; Maingi, Rajesh; Diallo, Ahmed Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States) https://doi.org/10.11578/1814960	dataset	January 2021

Similar Records

ELM Suppression by Boron Powder Injection and Comparison with Lithium Powder Injection on EAST

Journal Article · Mon Oct 12 00:00:00 EDT 2020 · Journal of Fusion Energy · OSTI ID:1779613

Suppression of edge localized modes with real-time boron injection using the tungsten divertor in EAST

Journal Article · Sun Dec 13 23:00:00 EST 2020 · Nuclear Fusion · OSTI ID:1818375

Type-I ELM mitigation by continuous lithium granule gravitational injection into the upper tungsten divertor in EAST

Dataset · Thu May 06 00:00:00 EDT 2021 · OSTI ID:1814955

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Plasma confinement
Plasma fluctuations
Tokamaks

Enhancement of edge turbulence concomitant with ELM suppression during boron powder injection in EAST

Citation Formats

References (51)

Cited By (1)

Similar Records

Related Subjects