Dynamic divertor control using resonant mixed toroidal harmonic magnetic fields during ELM suppression in DIII-D

Jia, M.; Sun, Y.; Paz-Soldan, C.; Nazikian, R.; Gu, S.; Liu, Y. Q.; Abrams, T.; Bykov, I.; Cui, L.; Evans, T.; Garofalo, A.; Guo, W.; Gong, X.; Lasnier, C.; Logan, N. C.; Makowski, M.; Orlov, D.; Wang, H. H.

doi:10.1063/1.5019777

Dynamic divertor control using resonant mixed toroidal harmonic magnetic fields during ELM suppression in DIII-D

Journal Article · Mon Mar 19 00:00:00 EDT 2018 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.5019777· OSTI ID:1468446

^[1]; ^[2]; ^[3]; Nazikian, R. ^[4]; Gu, S. ^[2]; Liu, Y. Q. ^[3]; ^[3]; Bykov, I. ^[5]; Cui, L. ^[4]; ^[3]; Garofalo, A. ^[3]; Guo, W. ^[2]; Gong, X. ^[2]; Lasnier, C. ^[6]; Logan, N. C. ^[4]; Makowski, M. ^[6]; Orlov, D. ^[5]; Wang, H. H. ^[2]

Chinese Academy of Sciences (CAS), Hefei (China). Inst. of Plasma Physics; Univ. of Science and Technology of China, Hefei (China); General Atomics, DIII-D, Technical Publications Dept.
Chinese Academy of Sciences (CAS), Hefei (China). Inst. of Plasma Physics
General Atomics, San Diego, CA (United States)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Univ. of California, San Diego, CA (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Experiments using Resonant Magnetic Perturbations (RMPs), with a rotating n = 2 toroidal harmonic combined with a stationary n = 3 toroidal harmonic, have validated predictions that divertor heat and particle flux can be dynamically controlled while maintaining Edge Localized Mode (ELM) suppression in the DIII-D tokamak. In this paper, n is the toroidal mode number. ELM suppression over one full cycle of a rotating n = 2 RMP that was mixed with a static n = 3 RMP field has been achieved. Prominent heat flux splitting on the outer divertor has been observed during ELM suppression by RMPs in low collisionality regime in DIII-D. Strong changes in the three dimensional heat and particle flux footprint in the divertor were observed during the application of the mixed toroidal harmonic magnetic perturbations. These results agree well with modeling of the edge magnetic field structure using the TOP2D code, which takes into account the plasma response from the MARS-F code. Finally, these results expand the potential effectiveness of the RMP ELM suppression technique for the simultaneous control of divertor heat and particle load required in ITER.

View Accepted Manuscript (DOE)

Research Organization:: Chinese Academy of Sciences (CAS), Hefei (China); General Atomics, San Diego, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Univ. of California, San Diego, CA (United States)

Sponsoring Organization:: National Natural Science Foundation of China (NSFC); USDOE; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)

Grant/Contract Number:: AC02-09CH11466; AC52-07NA27344; FC02-04ER54698; FG02-05ER54809

OSTI ID:: 1468446

Alternate ID(s):: OSTI ID: 1426847
OSTI ID: 1497943

Report Number(s):: LLNL-JRNL-758965

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 25; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

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