Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
3
datasets available to search
ShareScore release 0.9.0
Dataset results
3 results for “diii-d”
Effect of magnetic configuration on real-time wall conditioning in DIII-D
<p>Using EMC3-EIRENE modeling, the impact of parallel impurity forces on the edge transport of injected material and ionized impurities, including scrape-off layer (SOL) main ion flows, has been investigated. The study involved comparing impurity powder injections in different divertor configurations, namely DIII-D lower single null, upper single null, and double null configurations, with plasma edge transport and dust migration and ablation modeling. The injections, which were in powder and granular form, were conducted for real-time wall conditioning, ELM control, and divertor power exhaust at DIII-D [1]. Divertor configuration changes resulted in a redirection of SOL flows, which affected the conditioning of plasma-facing components on either the low field side or the high field side. Moreover, the injection location's poloidal shifts could modify the injected materials' penetration depths and trajectories in the plasma boundary. These changes had an impact on the local deposition of materials on plasma-facing components, which is essential for active conditioning and replenishment of functional coatings in future long-pulse scenarios.</p> <p>[1] F. Effenberg <em>et al</em> 2022 <em>Nucl. Fusion</em> <strong>62</strong> 106015 <strong>DOI</strong> 10.1088/1741-4326/ac899d</p>
The effect of pre-existing islands on disruption mitigation in MHD simulations of DIII-D
<p>Data underlying all figures. </p>
EMC3-EIRENE modeling of boron transport in DIII-D L-mode real-time wall conditioning experiments
<p>Observations from powder injection experiments in ASDEX-U and DIII-D showed improvements in the wall conditions in response to boron (B) or boron nitride (BN) injection in H-mode plasmas [1, 2]. Recent experiments have been performed in DIII-D to understand the physics of boron impurity transport during real-time wall conditioning via B powder injection. For this purpose, B powder was injected gravitationally in DIII-D at rates between 2-50 mg/s in 4 s flat top L-mode scenarios with the magnetic field in the unfavorable ∇B drift direction. Graphite and W-coated witness samples were introduced using the divertor material evaluation system (DiMES) for in-depth analysis of the deposited impurity layers.<br> Observations with a spectroscopically filtered camera showed evidence of striation patterns in the CII and BII emission on the divertor floor extending in the toroidal direction. Post-mortem analysis of the DiMES samples showed corresponding striation patterns alternating between strongly-coated and barely-coated regions. Secondary peaks in the divertor density and temperature obtained with Langmuir probes support the interpretation of a significant static magnetic perturbation affecting the scrape-off layer (SOL) background plasma and impurity transport during these experiments.<br> These effects visible in the SOL transport and plasma-surface interactions are investigated based on an analysis of potential error field effects and local source effects. First, the magnetic boundary and divertor footprints are analyzed based on equilibrium reconstruction, including static magnetic perturbations to account for known error fields. Then, the fully 3D plasma-fluid and kinetic edge neutral transport Monte-Carlo code EMC3-EIRENE is employed to resolve the effects of these error fields on SOL impurity transport and impurity fluxes onto the divertor. The structure and widths of the deposition patterns will be studied as a function of anomalous cross-field transport and impurity source location and compared with the experimental findings. This work will contribute to optimizing improvements in the wall conditions in response to B and BN powder injection recently observed on many confinement devices around the world [3, 4].</p> <p>[1] A. Bortolon et al., Nucl. Mater. and Energy, 384-389 (2019) 19</p> <p>[2] R. Lunsford et al., Nucl. Fusion 126034 (2019) 59</p> <p>[3] A. Nagy et al Rev. Sci. Instrum., 10K121 (2018) 89</p> <p>[4] R. Maingi et al., Nucl. Fusion, 024003 (2018) 58</p>
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.