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Neoclassical transport analysis of titanium impurity in plasmas with strongly peaked density profiles

Technical Report:

Abstract

The full neoclassical multi-ion calculation required for the interaction between titanium and light impurities like carbon and oxygen is presented. Intrinsic titanium impurity behavior in pellet fuelled plasmas was studied by applying the neoclassical impurity transport calculation to temporal evolutions of Ti XX and Ti XXI spectroscopically observed. Ti impurity accumulates in the plasma core region, correlated with peaked density profile and the absence of sawtooth oscillation. Impurity accumulation is caused by a strong ion density gradient driving force and collisions with light impurities, as the neoclassical impurity transport theory predicts. This impurity behavior is well described by the combination of reduced anomalous diffusion and neoclassical transport in the plasma interior. The reduced anomalous diffusion at the central region inside the q=1 is estimated to be 0.2 m{sup 2}/s. The outer zones continue to be dominated by anomalous transport. (author).
Authors:
Hirayama, Toshio; Sugie, Tatsuo; Sakasai, Akira; Yoshino, Ryuuji; Kamada, Yutaka [1] 
  1. Japan Atomic Energy Research Inst., Naka, Ibaraki (Japan). Naka Fusion Research Establishment
Publication Date:
Oct 01, 1991
Product Type:
Technical Report
Report Number:
JAERI-M-91-169
Reference Number:
SCA: 700330; PA: JPN-91:012185; SN: 92000659219
Resource Relation:
Other Information: PBD: Oct 1991
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; JT-60 TOKAMAK; NEOCLASSICAL TRANSPORT THEORY; CHARGED-PARTICLE TRANSPORT; TITANIUM IONS; EMISSION SPECTRA; PLASMA DENSITY; SPATIAL DISTRIBUTION; PLASMA; PELLET INJECTION; PLASMA IMPURITIES; 700330; PLASMA KINETICS, TRANSPORT, AND IMPURITIES
OSTI ID:
10117064
Research Organizations:
Japan Atomic Energy Research Inst., Tokyo (Japan)
Country of Origin:
Japan
Language:
English
Other Identifying Numbers:
Other: ON: DE92768107; TRN: JP9112185
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
JPN
Size:
20 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Hirayama, Toshio, Sugie, Tatsuo, Sakasai, Akira, Yoshino, Ryuuji, and Kamada, Yutaka. Neoclassical transport analysis of titanium impurity in plasmas with strongly peaked density profiles. Japan: N. p., 1991. Web.
Hirayama, Toshio, Sugie, Tatsuo, Sakasai, Akira, Yoshino, Ryuuji, & Kamada, Yutaka. Neoclassical transport analysis of titanium impurity in plasmas with strongly peaked density profiles. Japan.
Hirayama, Toshio, Sugie, Tatsuo, Sakasai, Akira, Yoshino, Ryuuji, and Kamada, Yutaka. 1991. "Neoclassical transport analysis of titanium impurity in plasmas with strongly peaked density profiles." Japan.
@misc{etde_10117064,
title = {Neoclassical transport analysis of titanium impurity in plasmas with strongly peaked density profiles}
author = {Hirayama, Toshio, Sugie, Tatsuo, Sakasai, Akira, Yoshino, Ryuuji, and Kamada, Yutaka}
abstractNote = {The full neoclassical multi-ion calculation required for the interaction between titanium and light impurities like carbon and oxygen is presented. Intrinsic titanium impurity behavior in pellet fuelled plasmas was studied by applying the neoclassical impurity transport calculation to temporal evolutions of Ti XX and Ti XXI spectroscopically observed. Ti impurity accumulates in the plasma core region, correlated with peaked density profile and the absence of sawtooth oscillation. Impurity accumulation is caused by a strong ion density gradient driving force and collisions with light impurities, as the neoclassical impurity transport theory predicts. This impurity behavior is well described by the combination of reduced anomalous diffusion and neoclassical transport in the plasma interior. The reduced anomalous diffusion at the central region inside the q=1 is estimated to be 0.2 m{sup 2}/s. The outer zones continue to be dominated by anomalous transport. (author).}
place = {Japan}
year = {1991}
month = {Oct}
}