Bulletin of the American Physical Society
63rd Annual Meeting of the APS Division of Plasma Physics
Volume 66, Number 13
Monday–Friday, November 8–12, 2021; Pittsburgh, PA
Session BP11: Poster Session I:
BEAMS - Coherent radiation and intense laser-driven x-ray sources; Laser-plasma ion accelerators; Relativistic high-energy-density physics and high field physics
MFE - Low Aspect Ratio Tokamaks
9:30 AM - 12:30 PM
Monday, November 8, 2021
Room: Hall A
Abstract: BP11.00021 : Analysis and sensitivity study of an HTS spherical tokamak pilot plant design using the PROCESS 0-D systems code*
Presenter:
Charles Swanson
(Princeton Plasma Physics Laboratory)
Authors:
Charles Swanson
(Princeton Plasma Physics Laboratory)
Walter Guttenfelder
(Princeton Plasma Physics Laboratory)
We benchmarked another design of Menard, a larger pilot plant design with a high-temperature superconducting (HTS) centerstack requiring less recirculating power. It has 3.0 meter major-radius, aspect ratio 2.0, 50 MW NBI power, Greenwald fraction 80%, and beta-normalized 4.2 %Tm/MA
We reproduced the plasma geometry, input and fusion power, plasma current, and bootstrap fraction, and Greenwald fraction to within 5%, but with beta-normalized (including alphas) 20% lower than the Menard value. This is similar to the earlier Muldrew benchmarking. We discuss this beta-N discrepancy.
The many user-selectable models available in PROCESS allow sensitivity studies to be performed. This includes models for profile type, bootstrap fraction, current drive efficiency, geometric relationships, and confinement. We quantify the sensitivity of the performance and optimality of a given design on these chosen assumptions.
*This work was supported by the U.S. Department of Energy under contract number DE-AC02-09CH11466. The United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes.
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