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Title: Phase-locking of magnetic islands diagnosed by ECE-imaging

Millimeter-wave imaging diagnostics identify phase-locking and the satisfaction of 3-wave coupling selection criteria amongst multiple magnetic island chains by providing a localized, internal measurement of the 2D power spectral density, S(ω, k pol). In high-confinement tokamak discharges, these interactions impact both plasma rotation and tearing stability. Here, nonlinear coupling amongst neoclassical tearing modes (NTMs) of different n-number, with islands not satisfying the poloidal mode number selection criterion {m, m ', m - m ' }, contributes to a reduction in core rotation and flow shear in the vicinity of the modes.
 [1] ;  [1] ;  [2] ;  [2] ;  [2] ;  [2] ;  [3] ;  [3] ;  [4]
  1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  2. Univ. of California, Davis, CA (United States)
  3. Univ. of Colorado, Boulder, CO (United States)
  4. Dutch Inst. for Fundamental Energy Research (Netherlands)
Publication Date:
Report Number(s):
Journal ID: ISSN 0034-6748; RSINAK; TRN: US1600660
Grant/Contract Number:
AC02-09CH11466; FC02-04ER54698
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 85; Journal Issue: 11; Conference: 20th Topical Conference on High-Temperature Plasma Diagnostics, Atlanta, GA (United States), Jun 2014; Related Information: © 2014 AIP Publishing LLC; Journal ID: ISSN 0034-6748
American Institute of Physics (AIP)
Research Org:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); General Atomics, La Jolla, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
Country of Publication:
United States
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; magnetohydrodynamics (MHD); tokamaks; tearing instability
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1367160