NSTX/NSTX-U theory, modeling and analysis results

Kaye, Stanley M.; Battaglia, D. J.; Baver, D. A.; Belova, Elena; Berkery, J. W.; Duarte, Vinicius N.; Ferraro, N.; Fredrickson, Eric D.; Gorelenkov, Nikolai N.; Guttenfelder, Walter

doi:10.1088/1741-4326/ab023a

NSTX/NSTX-U theory, modeling and analysis results

Journal Article · Mon Jan 28 00:00:00 EST 2019 · Nuclear Fusion

DOI:https://doi.org/10.1088/1741-4326/ab023a· OSTI ID:1508617

Kaye, Stanley M. ^[1]; ^[1]; Baver, D. A. ^[2]; Belova, Elena ^[1]; Berkery, J. W. ^[3]; ^[1]; Ferraro, N. ^[1]; Fredrickson, Eric D. ^[1]; Gorelenkov, Nikolai N. ^[1]; ^[1]

Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Lodestar Research Corp., Boulder, CO (United States)
Columbia Univ., New York, NY (United States)

The mission of the spherical tokamak NSTX-U is to investigate the physics that drives core and pedestal transport and stability at high-β and low collisionality, as part of the development of the ST concept towards a compact, low-cost ST-based Pilot Plant. NSTX- U will ultimately operate at up to 2 MA and 1 T with up to 12 MW of Neutral Beam Injection (NBI) power for 5 seconds. NSTX-U will operate in a regime where electromagnetic instabilities are expected to dominate transport, and beam-heated NSTX-U plasmas will explore a portion of energetic particle (EP) parameter space that is relevant for both α-heated conventional and low aspect ratio burning plasmas. NSTX-U will also develop the physics understanding and control tools to ramp-up and sustain high performance plasmas in a fully- noninductive fashion. NSTX-U began research operations in 2016, but a failure of a divertor magnetic field coil after ten weeks of operation resulted in the suspension of operations and initiation of Recovery activities. During this period, there has been considerable work in the area of analysis, theory and modeling of data from both NSTX and NSTX-U, with a goal of understanding the underlying physics to develop predictive models that can be used for high-confidence projections for both ST and higher aspect ratio regimes. The studies have presented issues in thermal plasma transport, macrostability, energetic particlet-driven instabilities at ion-cyclotron frequencies and below, and edge and divertor physics.

View Accepted Manuscript (DOE)

Research Organization:: Lodestar Research Corp., Boulder, CO (United States); Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)

Grant/Contract Number:: AC02-09CH11466; FG02-02ER54678

OSTI ID:: 1508617

Alternate ID(s):: OSTI ID: 1594316
OSTI ID: 22930004

Journal Information:: Nuclear Fusion, Journal Name: Nuclear Fusion Journal Issue: 11 Vol. 59; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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Analytic stability boundaries for compressional and global Alfvén eigenmodes driven by fast ions. I. Interaction via ordinary and anomalous cyclotron resonances Lestz, J. B.; Gorelenkov, N. N.; Belova, E. V. Physics of Plasmas, Vol. 27, Issue 2 https://doi.org/10.1063/1.5127551	journal	February 2020
Analytic stability boundaries for compressional and global Alfvén eigenmodes driven by fast ions. II. Interaction via Landau resonance Lestz, J. B.; Gorelenkov, N. N.; Belova, E. V. Physics of Plasmas, Vol. 27, Issue 2 https://doi.org/10.1063/1.5127552	journal	February 2020
Analytic stability boundaries for compressional and global Alfvén eigenmodes driven by fast ions. II. Interaction via Landau resonance Lestz, J. B.; Gorelenkov, N. N.; Belova, E. V. arXiv https://doi.org/10.48550/arxiv.1909.05465	text	January 2019

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