TRANSPORT STUDY ON THE BOUNDARY PLASMA OF THE WENDELSTEIN 7-AS STELLARATOR

被引：8

作者：

SARDEI, F ^{[1
]}

GRIGULL, P ^{[1
]}

HERRE, G ^{[1
]}

HILDEBRANDT, D ^{[1
]}

PECH, P ^{[1
]}

WENZEL, U ^{[1
]}

WOLFF, H ^{[1
]}

BALDZUHN, J ^{[1
]}

BOMBA, B ^{[1
]}

BRAKEL, R ^{[1
]}

BURHENN, R ^{[1
]}

BUCHSE, R ^{[1
]}

CATTANEI, G ^{[1
]}

DODHY, A ^{[1
]}

DORST, D ^{[1
]}

ELSNER, A ^{[1
]}

ENDLER, M ^{[1
]}

ENGELHARDT, K ^{[1
]}

ERCKMANN, V ^{[1
]}

GASPARINO, U ^{[1
]}

GEISSLER, S ^{[1
]}

GIANNONE, L ^{[1
]}

GRIEGER, G ^{[1
]}

GRIGULL, P ^{[1
]}

HACKER, H ^{[1
]}

HARTFUSS, HJ ^{[1
]}

HILDEBRANDT, D ^{[1
]}

HOFMANN, J ^{[1
]}

JAENICKE, R ^{[1
]}

KARGER, F ^{[1
]}

KICK, M ^{[1
]}

KROISS, H ^{[1
]}

KUHNER, G ^{[1
]}

LAZAROS, A ^{[1
]}

MAASSBERG, H ^{[1
]}

MAHN, C ^{[1
]}

MCCORMICK, K ^{[1
]}

NIEDERMEYER, H ^{[1
]}

OHLENDORF, W ^{[1
]}

PECH, P ^{[1
]}

RINGLER, H ^{[1
]}

RUHS, N ^{[1
]}

SAFFERT, J ^{[1
]}

SARDEI, F ^{[1
]}

SATTLER, S ^{[1
]}

SCHNEIDER, F ^{[1
]}

SCHNEIDER, U ^{[1
]}

SILLER, G ^{[1
]}

STROTH, U ^{[1
]}

TUTTER, M ^{[1
]}

机构：

[1] UNIV STUTTGART,INST PLASMAFORSCH,W-7000 STUTTGART 80,GERMANY

来源：

JOURNAL OF NUCLEAR MATERIALS | 1992年 / 196卷

关键词：

D O I：

10.1016/S0022-3115(06)80075-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

For a limiter defined SOL, as given by small values of the rotational transform, the edge topology of W7-AS is characterized by large flux bundles distributed regularly over the poloidal angle. These bundles are poloidally decoupled to a good approximation, as indicated by 2D resolved Langmuir probe data. Therefore, for iota less-than-or-equal-to 0.4, a 1D radial plasma model is a reasonable first step to provide a qualitative description of the transport in the W7-AS boundary layer. The toroidal variation of the flux bundle geometry is taken into account by averaging the transport equations along the corresponding field lines. The effects of the neutral gas sources and the sensitivity of the diffusion coefficient to the unknown T(i) profile are discussed. A iota scan of the diffusion coefficient shows a minimum at iota congruent-to 0.35, where smooth magnetic surfaces exist throughout the SOL. This suggests that topological effects related to perturbations at the ''natural'' 5/m resonances may be responsible for the observed iota dependence of the diffusion coefficient.

引用

页码：443 / 447

页数：5

共 7 条

[1] THE IMPACT OF BOUNDARY PLASMA CONDITIONS ON THE PLASMA PERFORMANCE OF THE WENDELSTEIN 7-AS STELLARATOR [J].

GRIGULL, P ;

BEHRISCH, R ;

BRAKEL, R ;

BURHENN, R ;

ELSNER, A ;

HACKER, H ;

HARTFUSS, HJ ;

HERRE, G ;

HILDEBRANDT, D ;

JAENICKE, R ;

KISSLINGER, J ;

MAASSBERG, H ;

MAHN, C ;

NIEDERMEYER, H ;

PECH, P ;

RENNER, H ;

RINGLER, H ;

RAU, F ;

ROTH, J ;

SARDEI, F ;

SCHNEIDER, U ;

WAGNER, F ;

WELLER, A ;

WOBIG, H ;

WOLFF, H .

JOURNAL OF NUCLEAR MATERIALS, 1992, 196 :101-112

[2]

HEIFETZ DB, 1983, J COMPUT PHYS, V46, P309

[3] EDGE PLASMA STRUCTURE AND POWER BALANCE IN TOKAMAKS [J].

LINGERTAT, J ;

GUENTHER, K ;

DIETRICH, L .

PLASMA PHYSICS AND CONTROLLED FUSION, 1987, 29 (10A) :1365-1376

[4]

Post D. E., 1986, Physics of Plasma-Wall Interactions in Controlled Fusion. Proceedings of a NATO Advanced Study Institute, P627

[5] POLOIDAL AND RADIAL VARIATIONS IN PLASMA TRANSPORT IN A LIMITER SCRAPE-OFF LAYER IN DITE [J].

PROUDFOOT, G ;

HARBOUR, PJ ;

ALLEN, J ;

LEWIS, A .

JOURNAL OF NUCLEAR MATERIALS, 1984, 128 (DEC) :180-185

[6]

RENNER H, 1990, 13TH P INT C WASH, V2, P439

[7] PARTICLE AND ENERGY-TRANSPORT IN THE PLASMA SCRAPE-OFF ZONE AND ITS IMPACT ON LIMITER DESIGN [J].

ULRICKSON, M ;

POST, DE .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1983, 1 (02) :907-910

← 1 →