Alpha-driven magnetohydrodynamics (MHD) and MHD-induced alpha loss in the Tokamak Fusion Test Reactor

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Alpha-driven toroidal Alfven eigenmodes (TAEs) are observed as predicted by theory in the post neutral beam phase in high central q (safety factor) deuterium-tritium (D-T) plasmas in the Tokamak Fusion Test Reactor (TFTR). The mode location, poloidal structure and the importance of q profile for TAE instability are discussed. So far no alpha particle loss due to these modes was detected due to the small mode amplitude. However, alpha loss induced by kinetic ballooning modes (KBMs) was observed in high confinement D-T discharges. Particle orbit simulation demonstrates that the wave-particle resonant interaction can explain the observed correlation between the increase ... continued below

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30 p.

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Chang, Z.; Nazikian, R. & Fu, G.Y. February 1, 1997.

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Alpha-driven toroidal Alfven eigenmodes (TAEs) are observed as predicted by theory in the post neutral beam phase in high central q (safety factor) deuterium-tritium (D-T) plasmas in the Tokamak Fusion Test Reactor (TFTR). The mode location, poloidal structure and the importance of q profile for TAE instability are discussed. So far no alpha particle loss due to these modes was detected due to the small mode amplitude. However, alpha loss induced by kinetic ballooning modes (KBMs) was observed in high confinement D-T discharges. Particle orbit simulation demonstrates that the wave-particle resonant interaction can explain the observed correlation between the increase in alpha loss and appearance of multiple high-n (n {ge} 6, n is the toroidal mode number) modes.

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30 p.

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Also available from the following url: http://www.pppl.gov. See PPPL reports section for full text.; OSTI as DE97051926

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  • Meeting of the Division of Plasma Physics of the American Physical Society, Denver, CO (United States), 11-15 Nov 1996

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  • Other: DE97051926
  • Report No.: PPPL--3231
  • Report No.: CONF-961102--
  • Grant Number: AC02-76CH03073
  • Office of Scientific & Technical Information Report Number: 304155
  • Archival Resource Key: ark:/67531/metadc674373

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Office of Scientific & Technical Information Technical Reports

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  • February 1, 1997

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  • July 25, 2015, 2:20 a.m.

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  • April 15, 2016, 8:03 p.m.

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Chang, Z.; Nazikian, R. & Fu, G.Y. Alpha-driven magnetohydrodynamics (MHD) and MHD-induced alpha loss in the Tokamak Fusion Test Reactor, article, February 1, 1997; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc674373/: accessed September 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.