Exploration of one-dimensional plasma current density profile for K-DEMO steady-state operation

Kang, Junsu; Jung, L.; Byun, Cheol-Sik; Na, D.H.; Na, Y.-S.; Hwang, Y.S.

doi:10.1016/j.fusengdes.2016.02.011

Cited by 1 publication

(2 citation statements)

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“…Overall burning plasma characteristics are assumed to be similar to those observed in present tokamak experiments and modeling results. A 0D system analysis has been executed which identified fusion performance and operation regime of K-DEMO in density/ temperature space [7]. Furthermore, a self-consistent integrated modeling was also conducted to appropriately contain an alpha heating deposition and bootstrap current from profile effect.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, a self-consistent integrated modeling was also conducted to appropriately contain an alpha heating deposition and bootstrap current from profile effect. 1D pressure and current density profile for K-DEMO was addressed by scanning control knobs such as injection location, beam number, and beam power assuming stable equilibria [7]. However, previous studies were not optimized in terms of integration of equilibrium, confinement, stability, and heating/current drive (H/CD), self-consistently.…”

Section: Introductionmentioning

confidence: 99%

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Development of a systematic, self-consistent algorithm for the K-DEMO steady-state operation scenario

Kang¹,

Park²,

Jung³

et al. 2017

Nucl. Fusion

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An optimum plasma pressure/current density profile and corresponding heating/current drive (H/CD) determination scheme is newly developed by integrating equilibrium, stability, confinement, and H/CD, self-consistently subject to maximize the fusion gain for Korean fusion demonstration reactor (K-DEMO) steady-state operation scenarios. The integrated plasma modeling package, FASTRAN/IPS, is adopted for the integrated numerical apparatus. The target pressure profile with a pedestal structure is investigated by varying its peaking, pedestal height and width as a first step. Formation of stable equilibria is evaluated by solving the Grad–Shafranov equation and checking linear MHD stability. For the case of potentially stable equilibrium, required external heating distribution is calculated by considering both power balance and external current drive alignment to reproduce the pressure profile of the stable equilibrium. Electron/ion temperature and poloidal flux evolutions are solved with the derived heating configuration to find a steady-state scenario and achieve self-consistent plasma profiles. A self-consistent target steady-state pressure and current profile parameters are proposed through designed systematic algorithm with fusion power PF = 2070 MW, fusion gain Q = 19.7, and normalized beta βN = 2.8 at toroidal field BT = 7.4 T and plasma current IP = 15.5 MA. Feasibility of fusion power PF = 3000 MW operation is also explored with enhanced density and temperature limit assumption.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%