First Observation Of ELM Pacing With Vertical Jogs In A Spherical Torus

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Experiments in a number of conventional aspect ratio tokamaks have been successful in pacing edge localized modes (ELMs) by rapid vertical jogging of the plasma. This paper demonstrates the first pacing of ELMs in a spherical torus plasma. Applied 30 Hz vertical jogs synchronized the ELMs with the upward motion of the plasma. 45 Hz jogs also lead to an increase in the ELM frequency, though the synchronization of the ELMs and jogs was unclear. A reduction in the ELM energy was observed at the higher driven ELM frequencies. __________________________________________________

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Gerhardt, S. P.; Canik, J. M.; Maingi, R.; Bell, R.; Gates, D.; Goldston, R. et al. July 15, 2010.

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Experiments in a number of conventional aspect ratio tokamaks have been successful in pacing edge localized modes (ELMs) by rapid vertical jogging of the plasma. This paper demonstrates the first pacing of ELMs in a spherical torus plasma. Applied 30 Hz vertical jogs synchronized the ELMs with the upward motion of the plasma. 45 Hz jogs also lead to an increase in the ELM frequency, though the synchronization of the ELMs and jogs was unclear. A reduction in the ELM energy was observed at the higher driven ELM frequencies. __________________________________________________

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191KB

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  • Nuclear Fusion (May 2010)

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  • Report No.: PPPL-4536
  • Grant Number: DE-ACO2--09CH11466
  • DOI: 10.2172/984470 | External Link
  • Office of Scientific & Technical Information Report Number: 984470
  • Archival Resource Key: ark:/67531/metadc1014964

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  • July 15, 2010

Added to The UNT Digital Library

  • Oct. 14, 2017, 8:36 a.m.

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  • Jan. 2, 2018, 1:27 p.m.

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Gerhardt, S. P.; Canik, J. M.; Maingi, R.; Bell, R.; Gates, D.; Goldston, R. et al. First Observation Of ELM Pacing With Vertical Jogs In A Spherical Torus, report, July 15, 2010; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc1014964/: accessed November 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.