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Spectroscopic measurement of atomic and molecular deuterium fluxes in the DIII-D plasma edge

Molecular deuterium fluxes into the edge of deuterium-fuelled L-mode discharges are measured using passive visible spectroscopy of D2 emission lines. Comparison with the atomic deuterium influx…
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Measurements of impurity and heat dynamics during noble gas jet-initiated fast plasma shutdown for disruption mitigation in DIII-D

Impurity deposition and mixing during gas jet-initiated plasma shutdown is studied using a rapid (∼5 ms), massive (∼1022 particles) injection of neon or argon into stationary DIII-D H-mode…
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EDGE2D-EIRENE predictions of molecular emission in DIII-D high-recycling divertor plasmas

Abstract The contributions of deuterium molecular emission to the total deuterium radiation was assessed in DIII-D ohmically-confined plasmas in high-recycling divertor conditions. Radial profiles of…
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OEDGE modeling of the DIII-D double null 13CH4 puffing experiment

Abstract Unbalanced double null ELMy H-mode configurations in DIII-D are used to simulate the situation in ITER high triangularity, burning plasma magnetic equilibria, where the second X-point lies…
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Electron pressure balance in the SOL through the transition to detachment

Abstract Upgrades to core and divertor Thomson scattering (DTS) diagnostics at DIII-D have provided measurements of electron pressure profiles in the lower divertor from attached- to fully-detached…
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Studies of EC pre-ionization in DIII-D to support development of ITER plasma initiation

New experiments have been conducted at DIII-D to improve the physics understanding of plasma initiation assisted by electron cyclotron (EC) wave injection, allowing better extrapolation to ITER. This…
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Simulation of localized fast-ion heat loads in test blanket module simulation experiments on DIII-D

Infrared imaging of hot spots induced by localized magnetic perturbations using the test blanket module (TBM) mock-up on DIII-D is in good agreement with beam-ion loss simulations. The hot spots were…
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Far SOL transport and main wall plasma interaction in DIII-D

Far Scrape-Off Layer (SOL) and near-wall plasma parameters in DIII-D depend strongly on the discharge parameters and confinement regime. In L-mode discharges cross-field transport increases with the…
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Modeling of detachment experiments at DIII-D

Abstract Edge fluid–plasma/kinetic–neutral modeling of well-diagnosed DIII-D experiments is performed in order to document in detail how well certain aspects of experimental measurements are…
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Interpretations of the impact of cross-field drifts on divertor flows in DIII-D with UEDGE

Abstract Simulations using the multi-fluid code UEDGE indicates that, in low confinement (L-mode) plasmas in DIII-D, poloidal projection of the ionization driven flows dominate poloidal particle…
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