Penetration of filamentary structures into the divertor region of spherical tokamaks

Baver, D. A.; Myra, J. R.

doi:10.1063/1.5065390

Penetration of filamentary structures into the divertor region of spherical tokamaks

Journal Article · Mon Feb 04 00:00:00 EST 2019 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.5065390· OSTI ID:1493608

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Lodestar Research Corp., Boulder, CO (United States); Lodestar Research Corporation
Lodestar Research Corp., Boulder, CO (United States)

Understanding the penetration from the midplane region towards the divertor plate of filamentary structures in the main scrape-off layer of spherical tokamaks is of interest for divertor design and plasma material interaction. Insight into this problem is gained by studying the closely related problem of the parallel structure of resistive ballooning modes, localized to a particular flux surface by a perturbed blob-like density profile. The resulting linearized equations are solved using the Arbitrary Topology Equation Reader (ArbiTER) code. A metric applied to the spatial structure of the dominant eigenmode quantifies mode penetration. Trends in this quantity are then measured by performing parameter scans over temperature and density. Furthermore, the results of this study are consistent with the dominant role of collisionality in limiting mode interaction with the divertor plate.

View Accepted Manuscript (DOE)

Research Organization:: Lodestar Research Corp., Boulder, CO (United States)

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

Contributing Organization:: Princeton Plasma Physics Laboratory

Grant/Contract Number:: FG02-02ER54678

OSTI ID:: 1493608

Report Number(s):: DOE-ER/54678--13; LRC--18-178

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 2 Vol. 26; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Disconnection of scrape off layer turbulence between the outer midplane and divertor target plate in NSTX Scotti, F.; Zweben, S.; Myra, J. Nuclear Fusion, Vol. 60, Issue 2 https://doi.org/10.1088/1741-4326/ab5886	journal	December 2019

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