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Title: Application of ECH to the study of transport in ITER baseline scenario-like discharges in DIII-D

Recent DIII-D experiments in the ITER Baseline Scenario (IBS) have shown strong increases in fluctuations and correlated reduction of confinement associated with entering the electron-heating-dominated regime with strong electron cyclotron heating (ECH). The addition of 3.2 MW of 110 GHz EC power deposited at ρ~0.42 to IBS discharges with ~3 MW of neutral beam injection causes large increases in low-k and medium-k turbulent density fluctuations observed with Doppler backscatter (DBS), beam emission spectroscopy (BES) and phase-contrast imaging (PCI) diagnostics, correlated with decreases in the energy, particle, and momentum confinement times. Power balance calculations show the electron heat diffusivity χ e increases significantly in the mid-radius region 0.4
Authors:
 [1] ;  [2] ;  [3] ;  [1] ;  [4] ;  [4] ;  [1] ;  [3] ;  [5] ;  [4] ;  [1] ;  [3] ;  [3] ;  [6] ;  [4] ;  [4] ;  [7]
  1. General Atomics, San Diego, CA (United States)
  2. Univ. of Texas at Austin, Austin, TX (United States)
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  4. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  5. Univ. of Wisconsin-Madison, Madison, WI (United States)
  6. Univ. of California, Los Angeles, CA (United States)
  7. Columbia Univ., New York, NY (United States)
Publication Date:
OSTI Identifier:
1214597
Grant/Contract Number:
AC02-09CH11466
Type:
Accepted Manuscript
Journal Name:
EPJ Web of Conferences
Additional Journal Information:
Journal Volume: 87; Journal ID: ISSN 2100-014X
Publisher:
EDP Sciences
Research Org:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY