Nature of Monster Sawteeth and Their Relationship to Alfven Instabilities in Tokamaks

Journal Article · Mon Feb 07 00:00:00 EST 2000 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.84.1212· OSTI ID:20215534

Bernabei, S ^[1]; Bell, M G ^[1]; Budny, R V ^[1]; Fredrickson, E D ^[1]; Gorelenkov, N N ^[1]; Hosea, J C ^[1]; Majeski, R ^[1]; Mazzucato, E ^[1]; Phillips, C K ^[1]; Schilling, G ^[1]

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1. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)

A correlation is explored between the presence of energetic particle modes (EPM) and long-period sawtooth oscillations in tokamak plasmas heated by rf waves. The eventual crash of these sawteeth is explained in terms of the loss of the stabilizing fast particles due to the EPM. The absence of long-period sawteeth in high q{sub a} discharges is explained in terms of ion loss due to toroidal Alfven eigenmodes. (c) 2000 The American Physical Society.

• OSTI ID: 20215534
• Journal Information: Physical Review Letters, Vol. 84, Issue 6; Other Information: PBD: 7 Feb 2000; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALFVEN WAVES
SAWTOOTH OSCILLATIONS
PLASMA HEATING
TFTR TOKAMAK
EXPERIMENTAL DATA