Evolution of toroidal Alfven eigenmode instability in TFTR

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The nonlinear behavior of the Toroidal Alfven Eigenmode (TAE) driven unstable by energetic ions in TFTR is studied. The evolution of instabilities can take on several scenarios: a single mode or several modes can be driven unstable at the same time, the spectrum can be steady or pulsating and there can be negligible or anomalous loss associated with the instability. This paper presents a comparison between experimental results and recently developed nonlinear theory. The authors find many features observed in experiment are compatible with the consequences of the nonlinear theory. Examples include the structure of the saturated pulse that emerges ... continued below

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39 p.

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Wong, K. L.; Majeski, R. & Petrov, M. July 1, 1996.

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Description

The nonlinear behavior of the Toroidal Alfven Eigenmode (TAE) driven unstable by energetic ions in TFTR is studied. The evolution of instabilities can take on several scenarios: a single mode or several modes can be driven unstable at the same time, the spectrum can be steady or pulsating and there can be negligible or anomalous loss associated with the instability. This paper presents a comparison between experimental results and recently developed nonlinear theory. The authors find many features observed in experiment are compatible with the consequences of the nonlinear theory. Examples include the structure of the saturated pulse that emerges from the onset of instability of a single mode and the decrease but persistence of TAE signals when the applied rf power is reduced or shut off.

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39 p.

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INIS; OSTI as DE96014771

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  • Other Information: PBD: Jul 1996

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  • Other: DE96014771
  • Report No.: DOE/ER/54346--753
  • Report No.: IFSR--753
  • Grant Number: FG03-96ER54346;AC02-76CH03073
  • DOI: 10.2172/373896 | External Link
  • Office of Scientific & Technical Information Report Number: 373896
  • Archival Resource Key: ark:/67531/metadc685373

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  • July 1, 1996

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  • July 25, 2015, 2:20 a.m.

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  • Aug. 10, 2016, 3:40 p.m.

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Wong, K. L.; Majeski, R. & Petrov, M. Evolution of toroidal Alfven eigenmode instability in TFTR, report, July 1, 1996; Austin, Texas. (digital.library.unt.edu/ark:/67531/metadc685373/: accessed January 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.