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Title: Progress Toward Attractive Stellarators

Abstract

The quasi-axisymmetric stellarator (QAS) concept offers a promising path to a more compact stellarator reactor, closer in linear dimensions to tokamak reactors than previous stellarator designs. Concept improvements are needed, however, to make it more maintainable and more compatible with high plant availability. Using the ARIES-CS design as a starting point, compact stellarator designs with improved maintenance characteristics have been developed. While the ARIES-CS features a through-the-port maintenance scheme, we have investigated configuration changes to enable a sector-maintenance approach, as envisioned for example in ARIES AT. Three approaches are reported. The first is to make tradeoffs within the QAS design space, giving greater emphasis to maintainability criteria. The second approach is to improve the optimization tools to more accurately and efficiently target the physics properties of importance. The third is to employ a hybrid coil topology, so that the plasma shaping functions of the main coils are shared more optimally, either with passive conductors made of high-temperature superconductor or with local compensation coils, allowing the main coils to become simpler. Optimization tools are being improved to test these approaches.

Authors:
; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1001680
Report Number(s):
PPPL-4589
TRN: US1100436
DOE Contract Number:  
DE-ACO2-09CH11466
Resource Type:
Conference
Resource Relation:
Conference: 23rd IAEA Fusion Energy Conference (October 2010)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AVAILABILITY; CONFIGURATION; DESIGN; DIMENSIONS; IAEA; MAINTENANCE; OPTIMIZATION; PHYSICS; PLASMA; STELLARATORS; SUPERCONDUCTORS; TARGETS; THERMONUCLEAR REACTORS; TOPOLOGY; Stellarators

Citation Formats

Neilson, G H, Brown, T G, Gates, D A, Lu, K P, Zarnstorff, M C, Boozer, A H, Harris, J H, Meneghini, O, Mynick, H E, Pomphrey, N, Reiman, A H, and Xanthopoulos, P. Progress Toward Attractive Stellarators. United States: N. p., 2011. Web.
Neilson, G H, Brown, T G, Gates, D A, Lu, K P, Zarnstorff, M C, Boozer, A H, Harris, J H, Meneghini, O, Mynick, H E, Pomphrey, N, Reiman, A H, & Xanthopoulos, P. Progress Toward Attractive Stellarators. United States.
Neilson, G H, Brown, T G, Gates, D A, Lu, K P, Zarnstorff, M C, Boozer, A H, Harris, J H, Meneghini, O, Mynick, H E, Pomphrey, N, Reiman, A H, and Xanthopoulos, P. Wed . "Progress Toward Attractive Stellarators". United States. https://www.osti.gov/servlets/purl/1001680.
@article{osti_1001680,
title = {Progress Toward Attractive Stellarators},
author = {Neilson, G H and Brown, T G and Gates, D A and Lu, K P and Zarnstorff, M C and Boozer, A H and Harris, J H and Meneghini, O and Mynick, H E and Pomphrey, N and Reiman, A H and Xanthopoulos, P},
abstractNote = {The quasi-axisymmetric stellarator (QAS) concept offers a promising path to a more compact stellarator reactor, closer in linear dimensions to tokamak reactors than previous stellarator designs. Concept improvements are needed, however, to make it more maintainable and more compatible with high plant availability. Using the ARIES-CS design as a starting point, compact stellarator designs with improved maintenance characteristics have been developed. While the ARIES-CS features a through-the-port maintenance scheme, we have investigated configuration changes to enable a sector-maintenance approach, as envisioned for example in ARIES AT. Three approaches are reported. The first is to make tradeoffs within the QAS design space, giving greater emphasis to maintainability criteria. The second approach is to improve the optimization tools to more accurately and efficiently target the physics properties of importance. The third is to employ a hybrid coil topology, so that the plasma shaping functions of the main coils are shared more optimally, either with passive conductors made of high-temperature superconductor or with local compensation coils, allowing the main coils to become simpler. Optimization tools are being improved to test these approaches.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {1}
}

Conference:
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