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Advanced tokamak physics in DIII-D

  • Author(s): Petty, CC
  • Luce, TC
  • Politzer, PA
  • Wade, MR
  • Allen, SL
  • Austin, ME
  • Bray, B
  • Burrell, KH
  • Casper, TA
  • Chu, MS
  • Ferron, JR
  • Fredrickson, ED
  • Garofalo, AM
  • Gohil, P
  • Gorelov, I
  • Greenfield, CM
  • Heidbrink, WW
  • Hsieh, CL
  • Hyatt, AW
  • Jayakumar, R
  • Johnson, LC
  • Kinsey, JE
  • La Haye, RJ
  • Lao, LL
  • Lasnier, CJ
  • Lazarus, EA
  • Leonard, AW
  • Lin-Liu, YR
  • Lohr, J
  • Mahdavi, MA
  • Makowski, MA
  • McKee, GR
  • Murakami, M
  • Navratil, GA
  • Okabayashi, M
  • Petrie, TW
  • Pinsker I, R
  • Prater, R
  • Rettig, CL
  • Rhodes, TL
  • Rice, BW
  • Scoville, JT
  • Staebler, GM
  • Strait, EJ
  • Taylor, TS
  • Watkins, JG
  • West, WP
  • Wolf, NS
  • Wong, KL
  • et al.
Abstract

Advanced tokamaks seek to achieve a high bootstrap current fraction without sacrificing fusion power density or fusion gain. Good progress has been made towards the DIII-D research goal of demonstrating a high-β advanced tokamak plasma in steady state with a relaxed, fully non-inductive current profile and a bootstrap current fraction greater than 50%. The limiting factors for transport, stability, and current profile control in advanced operating modes are discussed in this paper.

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