title: Edge temperature gradient as intrinsic rotation drive in Alcator C-Mod tokamak plasmas.
abstract: Intrinsic rotation has been observed in I-mode plasmas from the C-Mod tokamak, and is found to be similar to that in H mode, both in its edge origin and in the scaling with global pressure. Since both plasmas have similar edge ∇T, but completely different edge ∇n, it may be concluded that the drive of the intrinsic rotation is the edge ∇T rather than ∇P. Evidence suggests that the connection between gradients and rotation is the residual stress, and a scaling for the rotation from conversion of free energy to macroscopic flow is calculated.
authors.affiliation: PSFC, MIT, Cambridge, Massachusetts 02139, USA.
authors.forename: J E
authors.initials: JE
authors.lastname: Rice
authors.forename: J W
authors.initials: JW
authors.lastname: Hughes
authors.forename: P H
authors.initials: PH
authors.lastname: Diamond
authors.forename: Y
authors.initials: Y
authors.lastname: Kosuga
authors.forename: Y A
authors.initials: YA
authors.lastname: Podpaly
authors.forename: M L
authors.initials: ML
authors.lastname: Reinke
authors.forename: M J
authors.initials: MJ
authors.lastname: Greenwald
authors.forename: Ö D
authors.initials: ÖD
authors.lastname: Gürcan
authors.forename: T S
authors.initials: TS
authors.lastname: Hahm
authors.forename: A E
authors.initials: AE
authors.lastname: Hubbard
authors.forename: E S
authors.initials: ES
authors.lastname: Marmar
authors.forename: C J
authors.initials: CJ
authors.lastname: McDevitt
authors.forename: D G
authors.initials: DG
authors.lastname: Whyte