Investigation of transport in the DIII-D edge pedestal

Stacey, Weston M.

Title:

Investigation of transport in the DIII-D edge pedestal

dc.contributor.author	Stacey, Weston M.
dc.date.accessioned	2006-04-14T19:39:20Z
dc.date.available	2006-04-14T19:39:20Z
dc.date.issued	2004-04
dc.description	Reprinted by permission of American Institute of Physics, http://journals.aip.org	en
dc.description.abstract	A comparison of various heat conduction theories with data from several DIII-D [Luxon, Nucl. Fusion, 42, 614, 2002] shots indicates: 1) that neoclassical theory is in somewhat better agreement with experiment than is ion temperature gradient mode theory for the ion thermal conductivity in the edge pedestal, although both are in reasonable agreement with experiment for most discharges; and 2) that electron temperature gradient theory (k┴cs ≤ ωpe) is in much better agreement with experiment than is electron drift wave theory (k┴cs ≤ Ωi) for the electron thermal conductivity. New theoretical expressions derived from momentum balance are presented for: 1) a ‘diffusive-pinch’ particle flux, 2) an experimental determination of the momentum transfer frequency, and 3) the density gradient scale length. Neither atomic physics nor convection can account for the measured momentum transfer frequencies, but neoclassical gyroviscosity predictions are of the correct magnitude.
dc.format.extent	313856 bytes
dc.format.mimetype	application/msword
dc.identifier.citation	Physics of Plasmas, Vol. 11, no 4 (April 2004)p. 1511-1519
dc.identifier.uri	http://hdl.handle.net/1853/9307
dc.language.iso	en_US	en
dc.publisher	Georgia Institute of Technology	en
dc.publisher.original	American Institute of Physics
dc.subject	Doublet-3 device (DIII-D)
dc.subject	Electron temperature
dc.subject	Gyroviscosity
dc.subject	Heat conduction
dc.subject	Ion temperature
dc.subject	Momentum transfer
dc.subject	Neoclassical transport theory
dc.title	Investigation of transport in the DIII-D edge pedestal	en
dc.type	Text
dc.type.genre	Post-print
dspace.entity.type	Publication
local.contributor.author	Stacey, Weston M.
local.contributor.corporatename	George W. Woodruff School of Mechanical Engineering
local.contributor.corporatename	Fusion Research Center
relation.isAuthorOfPublication	c0f53c49-e84d-46a7-b831-23770e787081
relation.isOrgUnitOfPublication	c01ff908-c25f-439b-bf10-a074ed886bb7
relation.isOrgUnitOfPublication	0362cc39-e3e9-4cfb-be39-c6552423bdd2