Activities per year
Abstract
The mission of the spherical tokamak NSTX-U is to explore the physics that drives core and pedestal transport and stability at high-β and low collisionality, as part of the development of the spherical tokamak (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 power for 5 s. 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 parameter space that is relevant for both alpha-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. These studies have addressed issues in thermal plasma transport, macrostability, energetic particlet-driven instabilities at ion-cyclotron frequencies and below, and edge and divertor physics.
Original language | English |
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Article number | 112007 |
Number of pages | 16 |
Journal | Nuclear Fusion |
Volume | 59 |
Issue number | 11 |
DOIs | |
Publication status | Published - 5 Jun 2019 |
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Dive into the research topics of 'NSTX/NSTX-U theory, modeling and analysis results'. Together they form a unique fingerprint.Activities
- 3 Contribution or participation in a conference
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59th Annual Meeting of the APS Division of Plasma Physics
David Pfefferle (Keynote speaker/Invited speaker)
23 Oct 2017 → 27 Oct 2017Activity: Conferences and workshops › Contribution or participation in a conference
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Theory and Simulation of Disruptions Workshop
David Pfefferle (Keynote speaker/Invited speaker)
17 Jul 2017 → 19 Jul 2017Activity: Conferences and workshops › Contribution or participation in a conference
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Sherwood Fusion Theory Conference
David Pfefferle (Participant)
1 May 2017 → 3 May 2017Activity: Conferences and workshops › Contribution or participation in a conference