Survey of heating and current drive for K-DEMO

Mikkelsen, D. R.; Kessel, C. E.; Poli, F. M.; Bertelli, N.; Kim, K.

doi:10.1088/1741-4326/aaa4d2

Title: Survey of heating and current drive for K-DEMO

Journal Article · Mon Jan 22 00:00:00 EST 2018 · Nuclear Fusion

DOI:https://doi.org/10.1088/1741-4326/aaa4d2· OSTI ID:1419798

^[1];

^[1]; Bertelli, N. ^[1]; Kim, K. ^[2]

Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
National Fusion Research Institute, Daejeon (Republic of Korea)

Here, we present calculations of heating and current drive by neutral injection and by electromagnetic waves in the ion cyclotron, helicon, lower hybrid, and electron cyclotron frequency ranges for the steady state burn conditions in a K-DEMO configuration with $$I_{\rm p}=12.3$$ MA, a = 2.1 m, $$R_{\rm o}=6.8$$ m, $$B_{\rm o}=7.4$$ T, $$ \newcommand{\nebar}{{\overline{n}_{\rm e}}} \nebar=1.1 \times 10^{20}$$ m–3, $T(0)=40$ keV, and $$Z_{\rm eff}=1.5$$ . Lower hybrid wave current drive calculations comprise a 2D scan over poloidal launcher location and launched $$ \newcommand{\Nparallel}{{n_{\Vert}}} \Nparallel$$ , at a fixed frequency of 5 GHz. An ICRF frequency scan over 50–100 MHz is based on an ITER-like ICRF midplane antenna; the absorption calculation includes thermal D, T, He, Ar, and W as well as suprathermal beam ions and alphas. Helicon fast wave performance is surveyed by varying frequency over 0.6–2.5 GHz, launched $$ \newcommand{\Nparallel}{{n_{\Vert}}} \Nparallel$$ from –1.6 to –3, and launcher position from top to bottom on the low-field side. An ITER-like 1 MeV neutral beam system with quasi-tangential geometry is scanned over elevation to vary the targeted minor radius. The electron cyclotron survey varies the frequency (190–300 GHz), launcher poloidal location, and the poloidal and toroidal direction of the launched waves. We report for each system the range of minor radius in which current is driven, the current drive efficiency, the optimal system parameters, and typical profiles of driven current. Electron and ion heating profiles are reported for the ICRF and NBI systems.

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Research Organization:: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-09CH11466

OSTI ID:: 1419798

Journal Information:: Nuclear Fusion, Vol. 58, Issue 3; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 13 works

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Cited By (3)

Synergy effect of the Ohkawa current drive of electron cyclotron waves and the lower hybrid current drive: a new mechanism Zheng, P. W.; Gong, X. Y.; Yin, X. H. Nuclear Fusion, Vol. 59, Issue 5 https://doi.org/10.1088/1741-4326/ab110c	journal	April 2019
Integrated Tokamak modeling: When physics informs engineering and research planning Poli, Francesca Maria Physics of Plasmas, Vol. 25, Issue 5 https://doi.org/10.1063/1.5021489	journal	May 2018
On Synergy effect of Ohkawa Current Drive of Electron Cyclotron Waves and Lower Hybrid Current Drive: A New Mechanism Zheng, P. W.; Gong, X. Y.; Lu, X. Q. arXiv https://doi.org/10.48550/arxiv.1807.11656	text	January 2018

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Title: Survey of heating and current drive for K-DEMO

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