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Rapid change of hydrogen neutral energy distribution at L/H-transition in JFT-2M H-mode

Technical Report:

Abstract

Rapid changes of the main ion energy distribution at transitions from L-to-H, H-to-L and during ELMs are studied with the time of flight neutral measurement on the JFT-2M tokamak. At the L to H transition, 200-400{mu}s prior to the start of H{sub {alpha}} drop, an increase of the high energy outflux above an energy of 200eV is observed. An energy of more than 200eV for hydrogen corresponds to the collisionless condition {nu}*{sub i} < 1 just inside the separatrix. The change of the energy distribution precedes that of the H{sub {alpha}} signal and is also found for ELMs and the H to L transition. (author).
Authors:
Miura, Y; Okano, F; Suzuki, N; Mori, M; Hoshino, K; Maeda, H; Takizuka, T; [1]  Itoh, S; Itoh, K
  1. Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan). Tokai Research Establishment
Publication Date:
Feb 01, 1992
Product Type:
Technical Report
Report Number:
NIFS-134
Reference Number:
SCA: 700310; PA: JPN-92:011228; SN: 93000918633
Resource Relation:
Other Information: PBD: Feb 1992
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; JFT-2M TOKAMAK; H-MODE PLASMA CONFINEMENT; CHARGED-PARTICLE TRANSPORT; EDGE LOCALIZED MODES; PLASMA SCRAPE-OFF LAYER; CHARGE EXCHANGE; ENERGY SPECTRA; HYDROGEN; BALMER LINES; 700310; PLASMA CONFINEMENT
OSTI ID:
10111270
Research Organizations:
National Inst. for Fusion Science, Nagoya (Japan)
Country of Origin:
Japan
Language:
English
Other Identifying Numbers:
Other: ON: DE93753307; TRN: JP9211228
Availability:
OSTI; NTIS; INIS
Submitting Site:
JPN
Size:
22 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Miura, Y, Okano, F, Suzuki, N, Mori, M, Hoshino, K, Maeda, H, Takizuka, T, Itoh, S, and Itoh, K. Rapid change of hydrogen neutral energy distribution at L/H-transition in JFT-2M H-mode. Japan: N. p., 1992. Web.
Miura, Y, Okano, F, Suzuki, N, Mori, M, Hoshino, K, Maeda, H, Takizuka, T, Itoh, S, & Itoh, K. Rapid change of hydrogen neutral energy distribution at L/H-transition in JFT-2M H-mode. Japan.
Miura, Y, Okano, F, Suzuki, N, Mori, M, Hoshino, K, Maeda, H, Takizuka, T, Itoh, S, and Itoh, K. 1992. "Rapid change of hydrogen neutral energy distribution at L/H-transition in JFT-2M H-mode." Japan.
@misc{etde_10111270,
title = {Rapid change of hydrogen neutral energy distribution at L/H-transition in JFT-2M H-mode}
author = {Miura, Y, Okano, F, Suzuki, N, Mori, M, Hoshino, K, Maeda, H, Takizuka, T, Itoh, S, and Itoh, K}
abstractNote = {Rapid changes of the main ion energy distribution at transitions from L-to-H, H-to-L and during ELMs are studied with the time of flight neutral measurement on the JFT-2M tokamak. At the L to H transition, 200-400{mu}s prior to the start of H{sub {alpha}} drop, an increase of the high energy outflux above an energy of 200eV is observed. An energy of more than 200eV for hydrogen corresponds to the collisionless condition {nu}*{sub i} < 1 just inside the separatrix. The change of the energy distribution precedes that of the H{sub {alpha}} signal and is also found for ELMs and the H to L transition. (author).}
place = {Japan}
year = {1992}
month = {Feb}
}