2018
DOI: 10.1088/1741-4326/aa9e3f
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ELM elimination with Li powder injection in EAST discharges using the tungsten upper divertor

Abstract: We report the first successful use of lithium (Li) to eliminate edge-localized modes (ELMs) with tungsten divertor plasma-facing components in the EAST device. Li powder injected into the scrape-off layer of the tungsten upper divertor successfully eliminated ELMs for 3–5 s in EAST. The ELM elimination became progressively more effective in consecutive discharges at constant lithium delivery rates, and the divertor Dα baseline emission was reduced, both signatures of improved wall conditioning. A modest decrea… Show more

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Cited by 50 publications
(40 citation statements)
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References 45 publications
(53 reference statements)
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“…In the following we briefly discuss the various terms considered in Eqs. (1)(2)(3)(4), namely the forces, currents, particles and heat fluxes on the dust grain. The expressions for these quantities, taken mainly from Refs.…”
Section: Numerical Modelmentioning
confidence: 99%
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“…In the following we briefly discuss the various terms considered in Eqs. (1)(2)(3)(4), namely the forces, currents, particles and heat fluxes on the dust grain. The expressions for these quantities, taken mainly from Refs.…”
Section: Numerical Modelmentioning
confidence: 99%
“…The dust grain has an initial velocity directed downwards, v 0 = v 0 e z , with v 0 = −10 m/s. This scenario mimics impurity powder injection experiments [3,4,5,6]. The chosen poloidal position maximizes the dwelling of the dust grains into the plasma, while ensuring that the trajectory is contained in the SOL and does not cross the LCFS, where the turbulence characteristics are qualitatively different from the SOL.…”
Section: Example Of Dust Grain Trajectorymentioning
confidence: 99%
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“…As another Li wall conditioning method, the real-time Li aerosol injection technique is also developed on EAST and actively supports the achievement of long-pulse ELMfree H modes [26,27]. The edge impurity levels and particle recycling can be reduced by real-time Li injection, thus improving plasma performances.…”
Section: Control Of W Sputtering Sourcementioning
confidence: 99%
“…More recently, the injection of low-Z solid materials in powder, dust or small granule form was introduced as a novel technique for various real-time applications. First applications focused on disruption mitigation, real-time wall conditioning, mitigation of edge localized modes (ELMs), and confinement improvement with boron, boron nitride (BN), and lithium powders at T-10, DIII-D, EAST, ASDEX Upgrade, KSTAR, LHD, and W7-X [24,25,26,27,28,29,30,31,32].…”
Section: Introductionmentioning
confidence: 99%