@article{7981,
  author = {G.P. Canal and T. Lunt and H. Reimerdes and B. P. Duval and B. Labit and W. A. J. Vijvers and TCV team},
  title = {Enhanced -->E*-->B drift effects in the TCV snowflake divertor},
  abstract = {Measurements of various plasma parameters at the divertor targets of snowflake (SF) and conventional single-null configurations indicate an enhanced effect of the -->E*-->B drift in the scrape-off layer of plasmas in the SF configuration. Plasma boundary transport simulations using the EMC3-Eirene code show that the poloidal gradients of the kinetic profiles in the vicinity of the null-point of a SF divertor are substantially larger than those of a conventional single-null configuration. These gradients are expected to drive larger -->E*-->B flows in the SF divertor and are thought to be responsible for the formation of the double-peaked particle and heat flux target profiles observed experimentally. Experiments in forward and reversed toroidal magnetic field directions further support this conclusion. The formation of such a double-peaked profiles is enhanced at higher plasma densities and may have beneficial effects on the divertor heat loads since they lead to broader target profiles and lower peak heat fluxes.
},
  year = {2015},
  journal = {Nuclear Fusion},
  volume = {55},
  pages = {123023},
  url = {http://pubman.mpdl.mpg.de/pubman/item/escidoc:2228391:2/component/escidoc:2391697/Canal_Enhanced.pdf},
  doi = {10.1088/0029-5515/55/12/123023},
  language = {eng},
}