ISSN:0863-1042    

DOI:10.1002/ctpp.2150360202

出版商:WILEY‐VCH Verlag    

年代:1996

数据来源: WILEY

ISSN:0863-1042    

DOI:10.1002/ctpp.2150360203

出版商:WILEY‐VCH Verlag    

年代:1996

数据来源: WILEY

摘要:

AbstractWe present the status of comprehensive two‐dimensional (2‐D) transport modeling for the tokamak scrape‐off layer (SOL) using the UEDGE and B2.5 codes. These codes are now able to integrate a variety of physics, including coupling of plasma and neutral transport leading to detachment, complicated divertor‐plate geometries, multispecies impurities, and currents and E × B drifts. These new models are outlined and the capabilities are illustrated by a number of examples that emphasize the importance of including the 2‐

ISSN:0863-1042    

DOI:10.1002/ctpp.2150360204

出版商:WILEY‐VCH Verlag    

年代:1996

数据来源: WILEY

摘要:

AbstractThis paper reviews the present status of 2‐dimensional plasma edge codes with respect to simulation of electric fields and drift flows. Starting from experimental results and based on available simple analytic theories, different features of important mechanisms in the edge of a tokamak plasma are discussed and their availability in advanced numerical codes is establishe

ISSN:0863-1042    

DOI:10.1002/ctpp.2150360205

出版商:WILEY‐VCH Verlag    

年代:1996

数据来源: WILEY

摘要:

AbstractA comprehensive set of experiments has been carried out on the DIII‐D tokamak to measure the 2‐D (R,Z) structure of the divertor plasma in a systematic way using new diagnostics. Measurements cover the divertor radially from inside the X–‐point to the outer target plate and vertically from the target plate to above the X–‐point. Identical, repeatable shots were made, each having radial sweeps of the X–‐point and divertor strike points, to allow complete plasma and radiation profile measurements. Data have been obtained in ohmic, L–‐mode, ELMing H–‐mode, and reversed BToperation (ΔB drift away from the X–‐point). In addition, complete measurements were made of radiative divertor plasmas with a Partially Detached Divertor (PDD) induced by D2injection and with a Radiating Mantle induced by Impurity injection (MI) using neon and nitrogen. The data set includes first observations of the radial and poloidal profiles of the X‐point, inner and outer leg plasmas in PDD and RMI radiative divertor operation. Preliminary data analysis shows that intrinsic impurities play a critical role in determining t

ISSN:0863-1042    

DOI:10.1002/ctpp.2150360206

出版商:WILEY‐VCH Verlag    

年代:1996

数据来源: WILEY

摘要:

AbstractThe coupled core‐edge nonlinear transport codeCORSICA 2is introduced and the structure of its iterative coupling algorithm is briefly discussed. Selected application results are reported that reproduce equilibria in DIII‐D discharges with plasma profiles initialized from the experimental data. Simulations for an L‐H transition and for a gas puffing experiment in DIII‐D plasmas are pr

ISSN:0863-1042    

DOI:10.1002/ctpp.2150360207

出版商:WILEY‐VCH Verlag    

年代:1996

数据来源: WILEY

摘要:

AbstractWe have simulated detachment in Alcator C‐Mod, using an improved neutral fluid model. It features a parallel neutral momentum equation, fully coupled to the ions, allowing parallel plasma momentum to be converted into neutral momentum, which is dispersed to the material walls due to the high neutral viscosity. The simulations reproduce the pervasive experimental feature that the plasma detaches gradually, starting at the strike point, while always remaining attached above the nose of the divertor channel. The strike point heat flux and current drop by an order of magnitude as 0.5% of carbon is introduced to induce partial detachment. The plate temperature remains at or above about 1 eV all the way out to the divertor nose, in agreement with the experimental dat

ISSN:0863-1042    

DOI:10.1002/ctpp.2150360208

出版商:WILEY‐VCH Verlag    

年代:1996

数据来源: WILEY

ISSN:0863-1042    

DOI:10.1002/ctpp.2150360209

出版商:WILEY‐VCH Verlag    

年代:1996

数据来源: WILEY

ISSN:0863-1042    

DOI:10.1002/ctpp.2150360210

出版商:WILEY‐VCH Verlag    

年代:1996

数据来源: WILEY

摘要:

AbstractRecent work, both theoretical and computational, in the modelling of time‐dependent phenomena (Edge Localized Modes (ELMs)) in the plasma edge is reviewe

ISSN:0863-1042    

DOI:10.1002/ctpp.2150360211

出版商:WILEY‐VCH Verlag    

年代:1996

数据来源: WILEY