IMPURITY GENERATION MECHANISM AND REMOTE RADIATIVE COOLING IN JT-60U DIVERTOR DISCHARGES

被引:26
作者
KUBO, H
SHIMADA, M
SUGIE, T
HOSOGANE, N
ITAMI, K
TSUJI, S
NAKAMURA, H
ASAKURA, N
SAKASAI, A
KAWANO, Y
机构
[1] Japan Atomic Energy Research Institute, Naka-gun, Ibaraki-ken, 311-01, Mukoyama
关键词
D O I
10.1016/S0022-3115(06)80013-9
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The impurity behavior and the remote radiative cooling have been studied in the JT-60U divertor discharges with high power NB heating. NB at a power level of 20 MW was injected for 2 s, and no carbon bloom has been observed. For the first time, the measurement and the calculation for the carbon influx from the divertor plates are compared quantitatively. The carbon generation mechanism can be explained by the sputtering with deuterium (physical sputtering), oxygen and carbon. It is found that the contribution of the chemical sputtering with deuterium is small and that of the sputtering with oxygen is important. Remote radiative cooling can reduce the heat flux onto divertor plates. The dependence of the radiative cooling power on the electron density and the safety factor is presented. The favorable operation regime for discharges with high power auxiliary heating is discussed based on the experimental results.
引用
收藏
页码:71 / 79
页数:9
相关论文
共 30 条
  • [1] SPECTROSCOPIC DETERMINATION OF IMPURITY INFLUX FROM LOCALIZED SURFACES
    BEHRINGER, K
    SUMMERS, HP
    DENNE, B
    FORREST, M
    STAMP, M
    [J]. PLASMA PHYSICS AND CONTROLLED FUSION, 1989, 31 (14) : 2059 - 2099
  • [2] SPECTROSCOPIC STUDIES OF PLASMA WALL INTERACTION AND IMPURITY BEHAVIOR IN TOKAMAKS
    BEHRINGER, KH
    [J]. JOURNAL OF NUCLEAR MATERIALS, 1987, 145 : 145 - 153
  • [3] THE ENERGY-BALANCE OF DIVERTOR DISCHARGES IN THE PDX TOKAMAK
    BELL, MG
    FONCK, RJ
    GREK, B
    JAEHNIG, KP
    KAITA, R
    KAYE, SM
    MCBRIDE, T
    MUELLER, D
    OWENS, DK
    SCHMIDT, GL
    [J]. JOURNAL OF NUCLEAR MATERIALS, 1984, 121 : 132 - 137
  • [5] EROSION OF GRAPHITE BY HIGH-FLUX HYDROGEN PLASMA BOMBARDMENT
    GOEBEL, DM
    BOHDANSKY, J
    CONN, RW
    HIROOKA, Y
    LABOMBARD, B
    LEUNG, WK
    NYGREN, RE
    ROTH, J
    TYNAN, GR
    [J]. NUCLEAR FUSION, 1988, 28 (06) : 1041 - 1052
  • [6] DESIGN AND DEVELOPMENT OF JT-60 UPGRADE - VACUUM VESSEL AND 1ST WALL
    HORIIKE, H
    ANDO, T
    KUSHIMA, T
    MATSUKAWA, M
    NEYATANI, Y
    NINOMIYA, H
    YAMAMOTO, M
    [J]. FUSION ENGINEERING AND DESIGN, 1991, 16 : 285 - 292
  • [7] CHARACTERISTICS OF DIVERTOR PLASMA AND SCRAPE-OFF LAYER IN JT-60U
    ITAMI, K
    SHIMADA, M
    HOSOGANE, N
    [J]. JOURNAL OF NUCLEAR MATERIALS, 1992, 196 : 755 - 758
  • [8] JANEV RK, 1991, NUCL FUSION S, P123
  • [9] IONIZATION, RECOMBINATION, AND POPULATION OF EXCITED-LEVELS IN HYDROGEN PLASMAS
    JOHNSON, LC
    HINNOV, E
    [J]. JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER, 1973, 13 (04) : 333 - 358
  • [10] SPECTROSCOPIC STUDY OF IMPURITIES IN NEUTRAL BEAM HEATED AND OHMICALLY HEATED JT-60 DISCHARGES
    KUBO, H
    SUGIE, T
    SAKASAI, A
    KOIDE, Y
    NISHINO, N
    HIRAYAMA, T
    NISHITANI, T
    NAGASHIMA, K
    AKAOKA, N
    TAKEUCHI, H
    [J]. NUCLEAR FUSION, 1989, 29 (04) : 571 - 582