Ion heat pulse after a sawtooth crash in the JAERI Fusion Torus-2M tokamak

Journal Article · Tue Oct 01 00:00:00 EDT 1996 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.872029· OSTI ID:383786

Miura, Y; Okano, F; Suzuki, N; Mori, M; Hoshino, K; Takizuka, T ^[1]; Itoh, K ^[2]; Itoh, S ^[3]

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1. Japan Atomic Energy Research Institute (JAERI), Naka, Naka, Ibaraki, 311-01 (Japan)
2. National Institute for Fusion Science, Nagoya 464-04 (Japan)
3. Institute for Applied Mechanics, Kyushu University, Kasuga 816 (Japan)

The ion heat pulse after a sawtooth crash is studied by a time-of-flight (TOF) neutral measurement. A rapid change of the bulk ion energy distribution near the edge is observed after a sawtooth crash. The delay time is measured, and the effective measuring position is estimated by a neutral transport code. Then a transient ion thermal conductivity, {chi}{sub {ital i}}{sup HP}, of about (7{endash}18) m{sup 2}/s is evaluated for the low confinement mode (L-mode) plasma. The simple diffusive model with constant {chi}{sub {ital i}}{sup HP}, however, does not explain the amplitude of the pulse in the ion energy distribution. {copyright} {ital 1996 American Institute of Physics.}

• OSTI ID: 383786
• Journal Information: Physics of Plasmas, Vol. 3, Issue 10; Other Information: PBD: Oct 1996
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION
JET TOKAMAK
TRANSIENTS
SAWTOOTH OSCILLATIONS
THERMAL DIFFUSIVITY
THERMAL CONDUCTIVITY
TIME-OF-FLIGHT METHOD
HYDROGEN
PLASMA DISRUPTION
PLASMA DIAGNOSTICS