The Role of Lithium Conditioning in Achieving High Performance, Long Pulse H-mode Discharges in the NSTX and EAST Devices

Conference · Wed Oct 01 00:00:00 EDT 2014 · 25th IAEA Fusion Energy Conference Proceedings [EX/P6-54] on IAEA Physics website

OSTI ID:1182666

Maingi, Rajesh ^[1]; Mansfield, D. K. ^[1]; Gong, X. Z. ^[2]; Sun, Z. ^[2]; Bell, M. G. ^[1]

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1. PPPL
2. IPPCAS

In this paper, the role of lithium wall conditioning on the achievement of high performance, long pulse discharges in the National Spherical Torus Experiment (NSTX) and the Experimental Advanced Superconducting Tokamak (EAST) is documented. Common observations include recycling reduction and elimination of ELMs. In NSTX, lithium conditioning typically resulted in ELM-free operation with impurity accumulation, which was ameliorated e.g. with pulsed 3D fields to trigger controlled ELMs. Active lithium conditioning in EAST discharges has overcome this problem, producing an ELM-free Hmode with controlled density and impurities.

• Research Organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
• Sponsoring Organization: USDOE
• Contributing Organization: 1 Princeton Plasma Physics Laboratory, Receiving 3, Route 1 North, Princeton, NJ 08543 USA 2 Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031 China 3 General Atomics, PO Box 85608, San Diego, CA 92186, USA 4 Lawrence Livermore National Laboratory, 7000 East Ave, P.O. Box 808, Livermore CA 94551, USA
• DOE Contract Number: DE-AC02-09CH11466
• OSTI ID: 1182666
• Report Number(s): PPPL-5077
• Journal Information: 25th IAEA Fusion Energy Conference Proceedings [EX/P6-54] on IAEA Physics website, Conference: 25th IAEA Fusion Energy Conference, St. Petersburg, Russia, 13-18 October 2014.
• Publisher: IAEA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Divertors
Edge-localized Mode (ELM)
Lithium/ Scrape-off Layer (SOL)
Sperical Tokamak
Tokamaks
NSTX