Integrated modeling of high βN steady state scenario on DIII-D

Park, Jin Myung; Ferron, J. R.; Holcomb, Christopher T.; Buttery, Richard J.; Solomon, Wayne M.; Batchelor, D. B.; Elwasif, W.; Green, D. L.; Kim, K.; Meneghini, Orso; Murakami, M.; Snyder, Phil B.

doi:10.1063/1.5013021

Title: Integrated modeling of high β_N steady state scenario on DIII-D

Journal Article · Wed Jan 10 00:00:00 EST 2018 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.5013021· OSTI ID:1420378

Park, Jin Myung ^[1]; Ferron, J. R. ^[2]; Holcomb, Christopher T. ^[3]; Buttery, Richard J. ^[2];

^[2]; Batchelor, D. B. ^[1];

^[1];

^[1]; Kim, K. ^[4]; Meneghini, Orso ^[2]; Murakami, M. ^[1]; Snyder, Phil B. ^[2]

Oak Ridge National Lab., Oak Ridge, TN (United States)
General Atomics, San Diego, CA (United States)
Lawrence Livermore National Lab., Livermore, CA (United States)
Seoul National Univ., Seoul (South Korea)

Theory-based integrated modeling validated against DIII-D experiments predicts that fully non-inductive DIII-D operation with β_N > 4.5 is possible with certain upgrades. IPS-FASTRAN is a new iterative numerical procedure that integrates models of core transport, edge pedestal, equilibrium, stability, heating, and current drive self-consistently to find steady-state (d/dt = 0) solutions and reproduces most features of DIII-D high β_N discharges with a stationary current profile. Projecting forward to scenarios possible on DIII-D with future upgrades, the high q_min > 2 scenario achieves stable operation at β_N as high as 5 by using a very broad current density profile to improve the ideal-wall stabilization of low-n instabilities along with confinement enhancement from low magnetic shear. This modeling guides the necessary upgrades of the heating and current drive system to realize reactor-relevant high β_N steady-state scenarios on DIII-D by simultaneous optimization of the current and pressure profiles.

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Research Organization:: General Atomics, San Diego, CA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: FC02-04ER54698; AC02-05CH11231; AC05-00OR22725; FG02-95ER54309; FG02-95ER54698

OSTI ID:: 1420378

Alternate ID(s):: OSTI ID: 1416464; OSTI ID: 1502048; OSTI ID: 1649653

Report Number(s):: LLNL-JRNL-752091; TRN: US1801486

Journal Information:: Physics of Plasmas, Vol. 25, Issue 1; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 20 works

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