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Study of density limit in JT-60 joule heated plasmas

Abstract

Impurities which mingle in tokamak plasmas cause dominant radiation loss in the high density regime and the energy balance of plasma is lost. This gives rise to MHD instability and results in major disruption. Density limit in joule heated plasmas has been studied by using one dimensional transport code combined with MHD instability analysis code. When the diffusion of impurity is taken into account, the numerically obtained density limit diagram or Hugill diagram quantitatively agrees well with that obtained in the experiment. It is also clarified that the corona-equilibrium model overestimates the density limit. (author).
Authors:
Shirai, Hiroshi; Shimizu, Katsuhiro; Takizuka, Tomonori; Hirayama, Toshio; Azumi, Masafumi [1] 
  1. Japan Atomic Energy Research Inst., Naka, Ibaraki (Japan). Naka Fusion Research Establishment
Publication Date:
Nov 01, 1995
Product Type:
Technical Report
Report Number:
JAERI-Research-95-079
Reference Number:
SCA: 700460; PA: JPN-96:002212; EDB-96:062638; NTS-96:018313; SN: 96001566359
Resource Relation:
Other Information: PBD: Nov 1995
Subject:
70 PLASMA PHYSICS AND FUSION; JT-60 TOKAMAK; PLASMA DENSITY; TEARING INSTABILITY; PLASMA; PLASMA PRODUCTION; JOULE HEATING; PLASMA IMPURITIES; PLASMA DISRUPTION; CHARGED-PARTICLE TRANSPORT; COMPUTERIZED SIMULATION; SAWTOOTH OSCILLATIONS
OSTI ID:
204958
Research Organizations:
Japan Atomic Energy Research Inst., Tokyo (Japan)
Country of Origin:
Japan
Language:
English
Other Identifying Numbers:
Other: ON: DE96742580; TRN: JP9602212
Availability:
INIS; OSTI as DE96742580
Submitting Site:
JPN
Size:
48 p.
Announcement Date:

Citation Formats

Shirai, Hiroshi, Shimizu, Katsuhiro, Takizuka, Tomonori, Hirayama, Toshio, and Azumi, Masafumi. Study of density limit in JT-60 joule heated plasmas. Japan: N. p., 1995. Web.
Shirai, Hiroshi, Shimizu, Katsuhiro, Takizuka, Tomonori, Hirayama, Toshio, & Azumi, Masafumi. Study of density limit in JT-60 joule heated plasmas. Japan.
Shirai, Hiroshi, Shimizu, Katsuhiro, Takizuka, Tomonori, Hirayama, Toshio, and Azumi, Masafumi. 1995. "Study of density limit in JT-60 joule heated plasmas." Japan.
@misc{etde_204958,
title = {Study of density limit in JT-60 joule heated plasmas}
author = {Shirai, Hiroshi, Shimizu, Katsuhiro, Takizuka, Tomonori, Hirayama, Toshio, and Azumi, Masafumi}
abstractNote = {Impurities which mingle in tokamak plasmas cause dominant radiation loss in the high density regime and the energy balance of plasma is lost. This gives rise to MHD instability and results in major disruption. Density limit in joule heated plasmas has been studied by using one dimensional transport code combined with MHD instability analysis code. When the diffusion of impurity is taken into account, the numerically obtained density limit diagram or Hugill diagram quantitatively agrees well with that obtained in the experiment. It is also clarified that the corona-equilibrium model overestimates the density limit. (author).}
place = {Japan}
year = {1995}
month = {Nov}
}