% IMPORTANT: The following is UTF-8 encoded. This means that in the presence % of non-ASCII characters, it will not work with BibTeX 0.99 or older. % Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or % “biber”. @ARTICLE{Reiser:827856, author = {Reiser, D. and Eich, T.}, title = {{D}rift-based scrape-off particle width in {X}-point geometry}, journal = {Nuclear fusion}, volume = {57}, number = {4}, issn = {1741-4326}, address = {Vienna}, publisher = {IAEA}, reportid = {FZJ-2017-01944}, pages = {046011 -}, year = {2017}, abstract = {The Goldston heuristic estimate of the scrape-off layer width (Goldston 2012 Nucl. Fusion 52 013009) is reconsidered using a fluid description for the plasma dynamics. The basic ingredient is the inclusion of a compressible diamagnetic drift for the particle cross field transport. Instead of testing the heuristic model in a sophisticated numerical simulation including several physical mechanisms working together, the purpose of this work is to point out basic consequences for a drift-dominated cross field transport using a reduced fluid model. To evaluate the model equations and prepare them for subsequent numerical solution a specific analytical model for 2D magnetic field configurations with X-points is employed. In a first step parameter scans in high-resolution grids for isothermal plasmas are done to assess the basic formulas of the heuristic model with respect to the functional dependence of the scrape-off width on the poloidal magnetic field and plasma temperature. Particular features in the 2D-fluid calculations—especially the appearance of supersonic parallel flows and shock wave like bifurcational jumps—are discussed and can be understood partly in the framework of a reduced 1D model. The resulting semi-analytical findings might give hints for experimental proof and implementation in more elaborated fluid simulations.}, cin = {IEK-4}, ddc = {530}, cid = {I:(DE-Juel1)IEK-4-20101013}, pnm = {174 - Plasma-Wall-Interaction (POF3-174)}, pid = {G:(DE-HGF)POF3-174}, typ = {PUB:(DE-HGF)16}, UT = {WOS:000405944200003}, doi = {10.1088/1741-4326/aa5ab7}, url = {https://juser.fz-juelich.de/record/827856}, }