Small angle slot divertor concept for long pulse advanced tokamaks

Guo, H. Y.; Sang, C. F.; Stangeby, P. C.; Lao, L. L.; Taylor, T. S.; Thomas, D. M.

doi:10.1088/1741-4326/aa5b46

Title: Small angle slot divertor concept for long pulse advanced tokamaks

Journal Article · Thu Feb 16 00:00:00 EST 2017 · Nuclear Fusion

DOI:https://doi.org/10.1088/1741-4326/aa5b46· OSTI ID:1561846

Guo, H. Y. ^[1]; Sang, C. F. ^[1]; Stangeby, P. C. ^[2]; Lao, L. L. ^[1]; Taylor, T. S. ^[1]; Thomas, D. M. ^[1]

General Atomics, San Diego, CA (United States)
Univ. of Toronto, Toronto, ON (Canada)

SOLPS-EIRENE edge code analysis shows that a gas-tight slot divertor geometry with a small-angle (glancing-incidence) target, named the Small Angle Slot (SAS) divertor, can achieve cold, dissipative/detached divertor conditions at relatively low values of plasma density at the outside midplane separatrix. SAS exhibits the following key features: (1) strong enhancement of the buildup of neutral density in a localized region near the plasma strike point on the divertor target; (2) spreading of the cooling front across the divertor target with the slot gradually flaring out from the strike point, thus effectively reducing both heat flux and erosion on the entire divertor target surface. As a result, such a divertor may potentially provide a power and particle handling solution for long pulse advanced tokamaks.

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Research Organization:: General Atomics, San Diego, CA (United States)

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

Grant/Contract Number:: FC02-04ER54698

OSTI ID:: 1561846

Journal Information:: Nuclear Fusion, Vol. 57, Issue 4; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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